Startup disk partition map repair difficulties

Disk Utility is reporting that "The partition map needs to be repaired because there's a problem with the EFI system partition's file system." However, after booting into the Recovery HD and attempting to repair this, I keep getting the error, "Live file system repair is not supported." And yet I can verify that I am definitely not booting from the startup disk so I don't know why or how this is happening. Any ideas on next steps short of backing up, reformatting and wiping the drive?
Thanks in advance for any guidance!

Hi Richard,
If you are having issues resolving a disk issue when booted to the Recovery partition on the internal hard drive, especially issues regarding partitions themselves, you may want to try creating a Recovery System on an external volume, as outlined in the following article:
OS X: About Recovery Disk Assistant
Regards,
- Brenden

Similar Messages

  • My time machine 3 TB HD was encryption enabled and it took forever.  I tried reformattiing, it is online, but, get this Partition map repair failed while adjusting structures to fit current whole disk size.  Any comments appreciated.

    My time machine 3 TB HD was encryption enabled and it took forever.  I tried reformattiing, it is online, but, get this Partition map repair failed while adjusting structures to fit current whole disk size.  Any comments appreciated.

    This issue has been in discussion (actively) since last August here:
    https://discussions.apple.com/thread/4218970?start=0&tstart=0
    After months and months of new reports, it's pretty clear that this is an Apple Mountain Lion problem and one that Apple needs to address.  As one frsutrated user noted :
    >>There is no consistent solution for a user.  Apple has to supply it.  All you can do is submit a bug report to
    >> http://www.apple.com/feedback    
    Please, if you are encountering this problem you will save yourself a lot of wasted time and energey simple by joining me and others in asking Apple to fix this problem: Make a bug report.
    Thanks!

  • Disk utility gives "Error: Partition map repair failed while adjusting structures to fit current whole disk size"

    I am getting the following error when running Disk Utility (under ML) on an exteral USB hard drive:
    Error: Partition map repair failed while adjusting structures to fit current whole disk size.
    I get thsi when I ask Disk Utility to "Repair Disk" at the top level of the disk hierarchy (i.e. not on one of the partitions within the disk but on the disk itself).  I was not getting this error with Lion on the same disk before I upgraded from Lion to ML.
    It seems like a bug in ML.  I found websites where they suggest that you just run Lion's Disk Utility and it will show the disk to be fine.
    Any thoughts?

    So, I finally seemed to have resolved things with the Seagate 4TB Firewire external drive.  If you Google about, you will find a thread on Seagate's own support forum that describes how to disable the sleep function on the drive.  You CANNOT ALLOW THE DRIVE TO SLEEP WHILE CONNECTED TO YOUR MAC.
    After a lot of reading, here's what I think is happening: the drive goes to sleep, after some period of inactivity, and when you shutdown your Mac, OS X tries to write something to the drive as part of the dismount / disconnect / shutdown process.  That fails in some manner, leaving the drive 'corrupted' at the filesystem or partition level.
    Then, on the next boot-up, Mountain Lion tells you that it cannot repair the drive and it mounts as read only.  Your only fix at that point is to re-partition / re-format and start over (which is big fun with 3TB of data to copy back on to the drive).
    If you prevent the drive from sleeping, whenever it's connected to the MacBook, then the above process doesn't occur and voila, the drive just works.  So far, I haven't had any problems with about a week of starting / shutting down my MacBook connected to the offending drive (translation: I was going to return the drive, but the problem is clearly with Mac OS X Mountain Lion).

  • DISK UTILITY Error: Partition map repair failed...

    Hi all,
    I purchased a new SEAGATE BACKUP PLUS 3T USB3.0 drive - and formatted GUID 1 partition - then ran repair disk and it showed with = "Error: Partition map repair failed while adjusting structures to fit current whole disk size"
    And I also tried 4 partitions but no help
    And I also tried formatting same on older 10.6 mac with no errors - then came back to 10.8 and error shows there...
    Can some folks please try this on there own setups to see how widespread this is...
    Criteria...
    1 - ML 10.8.2
    2 - Large external drive 2T or greater
    Q: Has anyone experienced this and has a possible solution?
    Thanks

    HI all,
    This issue has been in discussion (actively) since last August here:
    https://discussions.apple.com/thread/4218970?start=0&tstart=0
    After months and months of new reports, it's pretty clear that this is an Apple Mountain Lion problem and one that Apple needs to address.  As one frustrated user noted :
    >>There is no consistent solution for a user.  Apple has to supply it.  All you can do is submit a bug report to
    >> http://www.apple.com/feedback    
    Please, if you are encountering this problem you will save yourself a lot of wasted time and energy simply by joining me and others in asking Apple to fix this problem: Make a bug report.
    Thanks!

  • TS1550 Error message: Backup Failed.  However if the startup disk permissions are repaired one only backup will succeed before the permissions are again repaired.  How is this to be fixed?

    Error message: Backup Failed.  However if the startup disk permissions are repaired one backup will succeed before the permissions are again repaired.  How is this to be fixed?

    Hi,
    Bootup holding CMD+r, or the Option/alt key to boot from the Restore partition & use Disk Utility from there to Repair the Disk, then Repair Permissions.
    Then Repair the backup Disk... any change?

  • Unable to repair disk (Partition map) Please HELP !

    Hi,
    I have the weirdest problem with my 15" retina macbook pro.
    Earlier today, OS X automatically rebooted after some kind of bug. I was then unable to start the computer, wether it was through recovery or as usual.
    Started in Safe mode, Backed up with time machine, and restored system.
    I'm now able to boot as usual but when I launch Disk Utility, I detects an error. Please find DU log at end of this message.
    When I click Repair Disk, I continuously get the same error message (this disk needs to be repaired).
    Any ideas how I can get this error fixed ?
    Thanks so much !
    2015-02-14 19:10:03 +0100: Verifying and repairing partition map for “APPLE SSD SM1024F Media”
    2015-02-14 19:10:03 +0100: Starting repair tool:
    2015-02-14 19:10:03 +0100: Checking prerequisites
    2015-02-14 19:10:03 +0100: Checking the partition list
    2015-02-14 19:10:03 +0100: Adjusting partition map to fit whole disk as required
    2015-02-14 19:10:03 +0100: Checking for an EFI system partition
    2015-02-14 19:10:03 +0100: Checking the EFI system partition’s size
    2015-02-14 19:10:03 +0100: Checking the EFI system partition’s file system
    2015-02-14 19:10:03 +0100: Checking all HFS data partition loader spaces
    2015-02-14 19:10:03 +0100: Checking booter partitions
    2015-02-14 19:10:03 +0100: Checking booter partition disk0s3
    2015-02-14 19:10:03 +0100: Repairing file system.
    2015-02-14 19:10:03 +0100: Checking Journaled HFS Plus volume.
    2015-02-14 19:10:03 +0100: Invalid number of allocation blocks
    2015-02-14 19:10:03 +0100: The volume   could not be verified completely.
    2015-02-14 19:10:03 +0100: File system check exit code is 8.
    2015-02-14 19:10:03 +0100: Updating boot support partitions for the volume as required.
    2015-02-14 19:10:03 +0100: Reviewing boot support loaders
    2015-02-14 19:10:03 +0100: Checking Core Storage Physical Volume partitions
    2015-02-14 19:10:04 +0100: Updating Windows boot.ini files as required
    2015-02-14 19:10:04 +0100: Problems were encountered during repair of the partition map
    2015-02-14 19:10:04 +0100: Error: This disk needs to be repaired. Click Repair Disk.

    If you have a backup (for both OS's: OS X and Windows) you might try with booting to single user mode and use fsck tool: Resolve startup issues and perform disk maintenance with Disk Utility and fsck - Apple Support
    But if that would be my own mac i would probably create myself a Recovery USB Disk or Bootable OS Yosemite Installer Disk and repartition my Hard Drive and then reinstall OS X and restore data to it. If Disk Utility is reporting an issue with Partition Map Scheme i would be a bit anxious about my data stored on this drive...
    Mac Basics: Time Machine backs up your Mac - Apple Support
    OS X: About Recovery Disk Assistant - Apple Support
    Create a bootable installer for OS X Mavericks or Yosemite - Apple Support
    How to move data to your new Mac using Mountain Lion and earlier - Apple Support also Yosemite

  • Hard time for selecting Startup Disk (partition) in Mac Classic II.

    Dear coleagues, I'd like your help to understand and solve a tricky trouble. I'm sorry for the long text, but the issue is probably living in a small detail.
    The issue regards a Mac Classic II with internal and external HDDs. Internal HDD has two partitions, a smaller with System 7.1 (first) and a larger with System 7.5.3 (second). This one is installed there since 5 years ago, working fine.
    The (just installed) external HDD has 6 partitions (because of its size 9 Gb). It has been formated runing VCP in this Classic II itself and all partitions are initialized with HFS. It is intended to be a backup for my Classic II as well as my Mac Plus. I've started Installing System 7.5.3 in its third partition. Other partitions remain still empty.
    Using only internal HDD I can already perceive that "Startup Disk" control panel is unable to change the boot partition attribute between partitions in the same drive. When I open "Startup Disk" it usualy both partitions of internal HDD are highlighted. I can select a Zip Drive, for instance, and it will boot from Zip. But, when I switch it back to HDD, doesn't bother wich partition I select, it will always boot with the same partition (usually 7.5.3). Then, If i open Startup Disk CP again, both partitions are again highlighted.
    To switch between partitions in the same drive, I use Lido 7.5.6 PMount and there I select the boot partition. Then every time I select my HDD, that'll be the default boot partition.
    My conclusion is that in Mac Classic II the Startup Disk CP is unable to set a partition within a drive, it selects the drive only. The boot will obey the drive's partition table flag. That's why I can do it whith Lido, writing directly at HDD's flags.
    Now, attaching the external HDD, I can see all its partitions in Startup Disk CP and then I select one of them (the 3rd, with 7.5.3). Before rebooting, I close and open again the Startup Disk CP, then I can see all its 6 partitions highlighted. Just like I've been doing with the internal HDD, probably the solution to set a specific boot partition would be through Lido 7.5.6 PMount again. But Lido is unable to handle this drive. It appears gray in the drives list.
    What does it sound to you? What would you recommend to test? Is there an alternative for Startup Disk CP?
    Thank you.
    Regards, Ciro (Brazil)

    Dear Jan, good Evening.
    Thank you for your time.
    In fact I can select a specific partition, but by closing and reopenning Startup Disk CP I realize that the selection has been attributed to the physical drive (all partitions highlighted).
    I have tried Startup Disk CP in both System 7.1 and System 7.5.3. They do the same way.
    Internal HDD has been formated, partitioned and initialized with Apple HD CS Setup.
    This external HDD in a different way. Apple HD SC Setup hasn't been able to "see" it, probably because of its prior format system. Lido neither. That's why I went to VCP. Moreover, as it is too big for 68030, I had to format it attached to a Performa 6360. After formating, I've let VCP make set the partitions in HFS mode (partitions with 512, 1024 and 2032 Mb).
    I've mounted VCP in Mini VMac to get some screenshots for you:
    Bringing it back to Mac Classic II, it could be mounted with Lido, but System 7 has asked to initialize all partitions again. I've accepted, installed system 7 on it, and it didn't boot. Then I've repeated the partitioning and initializing procedures using Apple HD SC Setup (since now there's a Mac HDD with "small" logical drives). Nothing changed.
    I'm following your tip about System Picker. I've downloaded the sit file and read about it. It seems to be able to overlay the problem. I'm gonna try it and report back here.
    But I feel still uncomfortable not to be able to do things the regular way. As far as I know, the boot partition is an attribute of a drive partition in partition map, just like the "Active Partition" found in FAT systems. I should be able to write there as I can do with Lido in internal HDD.
    Thank you, Jan.
    Best regards,
    Ciro Bruno.

  • Increase startup disk partition size

    Greetings,
    I need a simple way to increase the size of my startup drive.  Currently my SSD drive has 2 equal partitions of approximately 250GB.  The top partition has no data or applications, it is empty and can be eliminated.  The lower partition is 95% full with applications only.  The operating system is 10.8.5.
    Can I simply copy everything from my Home Folder (all my applications and operating system) to a secondary drive, then reformat the impacted original startup drive to one partition, then copy the Home Folder back?  Will the operating system work properly?  Will applications work properly?  Sorry for these basic questions, but I would sincerely appreciate any knowledge on this topic.
    Thanks, Scott

    Use a program such as the Disk Utility, Carbon Copy Cloner, or SuperDuper to clone the contents of the bottom partition to the top one, restart from the top one, delete the bottom one, and then resize the remaining partition to the size of the drive.
    If your computer is authorized to play protected iTunes Store content, deauthorize it first.
    (91890)

  • Boot Camp Startup Disk Partition Problem

    Hi,
    I am using MacBook Pro (13-inch, Mid 2012).
    I'm trying to install Windows 8.1 through Boot Camp Assistant ver. 5.1.3.
    I get the follow error message when I open Boot Camp Assistant
    This is the screenshot of my DU's partition tab
    It seems like the problem is because I have two partitions, but I don't know why I have disk0s1.
    I've never touched DU before.
    Is it safe to delete disk0s1?

    Hi, I am indeed using Yosemite.
    Please see my output below
    diskutil list
    /dev/disk0
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:      GUID_partition_scheme                        *750.2 GB   disk0
       1:                  Apple_HFS                         209.7 MB   disk0s1
       2:          Apple_CoreStorage                         749.3 GB   disk0s2
       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
    /dev/disk1
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:                  Apple_HFS Macintosh HD           *748.9 GB   disk1
                                     Logical Volume on disk0s2
                                     B431B5DA-5653-4555-B698-B49FF0EBE308
                                     Unlocked Encrypted
    /dev/disk2
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:     FDisk_partition_scheme                        *8.1 GB     disk2
       1:                 DOS_FAT_32 WININSTALL              8.1 GB     disk2s1
    diskutil cs list
    CoreStorage logical volume groups (1 found)
    |
    +-- Logical Volume Group 44DD3F84-BCDD-4C47-A70C-6AEDA2F1664E
        =========================================================
        Name:         Macintosh HD
        Status:       Online
        Size:         749296615424 B (749.3 GB)
        Free Space:   18939904 B (18.9 MB)
        |
        +-< Physical Volume 4A4380C6-6005-4F15-A705-F7F3D13575B1
        |   ----------------------------------------------------
        |   Index:    0
        |   Disk:     disk0s2
        |   Status:   Online
        |   Size:     749296615424 B (749.3 GB)
        |
        +-> Logical Volume Family F353CD2D-8D25-4009-B483-8E7AF98117BC
            Encryption Status:       Unlocked
            Encryption Type:         AES-XTS
            Conversion Status:       Complete
            Conversion Direction:    -none-
            Has Encrypted Extents:   Yes
            Fully Secure:            Yes
            Passphrase Required:     Yes
            |
            +-> Logical Volume B431B5DA-5653-4555-B698-B49FF0EBE308
                Disk:                  disk1
                Status:                Online
                Size (Total):          748925353984 B (748.9 GB)
                Conversion Progress:   -none-
                Revertible:            Yes (unlock and decryption required)
                LV Name:               Macintosh HD
                Volume Name:           Macintosh HD
                Content Hint:          Apple_HFS
    sudo gpt -vv -r show /dev/disk0
    gpt show: /dev/disk0: mediasize=750156374016; sectorsize=512; blocks=1465149168
    gpt show: /dev/disk0: PMBR at sector 0
    gpt show: /dev/disk0: Pri GPT at sector 1
    gpt show: /dev/disk0: Bad CRC in GPT table at sector 1465149135
           start        size  index  contents
               0           1         PMBR
               1           1         Pri GPT header
               2          32         Pri GPT table
              34           6        
              40      409600      1  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
          409640  1463469952      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC
      1463879592     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
      1465149128          40 
    sudo fdisk /dev/disk0
    Disk: /dev/disk0 geometry: 91201/255/63 [1465149168 sectors]
    Signature: 0xAA55
             Starting       Ending
    #: id  cyl  hd sec -  cyl  hd sec [     start -       size]
    1: EE 1023 254  63 - 1023 254  63 [         1 - 1465149166] <Unknown ID>
    2: 00    0   0   0 -    0   0   0 [         0 -          0] unused     
    3: 00    0   0   0 -    0   0   0 [         0 -          0] unused     
    4: 00    0   0   0 -    0   0   0 [         0 -          0] unused  

  • Increase System Volume/Startup Disk Partition Size

    Hi,
    I don't know much about Macs or OSX so bear with me.. I have been searching for a simple way to increase the size of the System Volume on my daughters MacBook running Maverick. She keeps getting a warning to say that the start-up disk is full or nearly full. I have used drive magic to clear some of the temp files and also used monolingual which has helped.
    The trouble is that the System Volume only has 74 MB of free space whilst the User Data partition has 172GB of free space. I have tried to clean the disk using utilities and have moved the User folder to the User Data partition but that is not really helping..
    Is there a way to expand/extend the System Volume area so that it doesn’t constantly run out of space without losing the User Data?
    I can’t update applications because if I try I get told there is not enough disk space available…
    I have uploaded some screenshots that may help:
    System Volume:
    https://dl.dropboxusercontent.com/u/7548959/sv.jpg
    User Data:
    https://dl.dropboxusercontent.com/u/7548959/ud.jpg
    If there is some software that I can purchased that could be used to do this then let me know.
    Cheers
    M

    Everything there looks ok in that screenshot (I was looking to see if there was any [Backup] data, but you only have 400MB in the User Data partition)
    I would suggest that you just have one partiton (usually named Macistosh HD, but you can name is anything you want. (Is there a reason why you have it partitoned this way?)
    To expand the System Volume partiton, you first need to delete the User Data partiton.
    BACK UP ALL DATA
    Copy all files from the User Data Partion to an external HD (or flash drive)
    In Disk Utility, select the Partiton Tab, click the User Data Partiton and click [-] to Remove
    Drag the Right Corner of the System Data partiton to expand the partiton
    OPTIONAL
               a) Click [+] to Add Back the User Data partiton
               b) Move the slider between the partitons to re-size
        6. Click [Apply]
        7. Copy back the User Data from the External Drive (or flash drive]
    For more info see: Disk Utility - Add, Delete, and Resize Existing Volumes

  • Losing disk partition after choosing startup disk

    Hi,
    I'm using MB Pro retina 2012, I have 3 disk partitions. 1 for Mac osx, 1 for windows (bothcamp) and 1 for data (ExFAT). I using it normally until I change startup disk to Windows. After that, data drive is not show anymore. I have more than 100GB important data on this drive. What happend? How to restore them? I cant repair disk, it doesnt work for me. It show like this on disk utility.
    I've tried to mount it, repair, verify but not successful. This is the log:
    2013-07-18 15:39:32 +0700: Disk Utility started.
    2013-07-18 15:44:53 +0700: Verifying partition map for “APPLE SSD SM512E Media”
    2013-07-18 15:44:53 +0700: Starting verification tool:
    2013-07-18 15:44:53 +0700: Checking prerequisites
    2013-07-18 15:44:53 +0700: Checking the partition list
    2013-07-18 15:44:53 +0700: Checking for an EFI system partition
    2013-07-18 15:44:53 +0700: Checking the EFI system partition’s size
    2013-07-18 15:44:53 +0700: Checking the EFI system partition’s file system
    2013-07-18 15:44:53 +0700: Checking all HFS data partition loader spaces
    2013-07-18 15:44:53 +0700: Checking Core Storage Physical Volume partitions
    2013-07-18 15:44:53 +0700: The partition map appears to be OK
    2013-07-18 15:44:53 +0700:
    2013-07-18 15:44:53 +0700:
    2013-07-18 15:44:55 +0700: Verifying and repairing partition map for “APPLE SSD SM512E Media”
    2013-07-18 15:44:55 +0700: Starting repair tool:
    2013-07-18 15:44:55 +0700: Checking prerequisites
    2013-07-18 15:44:55 +0700: Checking the partition list
    2013-07-18 15:44:55 +0700: Adjusting partition map to fit whole disk as required
    2013-07-18 15:44:55 +0700: Checking for an EFI system partition
    2013-07-18 15:44:55 +0700: Checking the EFI system partition’s size
    2013-07-18 15:44:55 +0700: Checking the EFI system partition’s file system
    2013-07-18 15:44:55 +0700: Checking all HFS data partition loader spaces
    2013-07-18 15:44:55 +0700: Reviewing boot support loaders
    2013-07-18 15:44:55 +0700: Checking Core Storage Physical Volume partitions
    2013-07-18 15:44:55 +0700: Updating Windows boot.ini files as required
    2013-07-18 15:44:55 +0700: The partition map appears to be OK
    2013-07-18 15:44:55 +0700:
    2013-07-18 15:44:55 +0700:
    2013-07-18 15:51:33 +0700: Disk Utility started.
    2013-07-18 15:59:19 +0700: Disk Utility started.
    2013-07-18 15:59:36 +0700: Preparing to remove partition from disk: “APPLE SSD SM512E Media”
    2013-07-18 15:59:36 +0700:           Partition Scheme: GUID Partition Table
    2013-07-18 15:59:36 +0700:           1 partition will be removed
    2013-07-18 15:59:36 +0700:           1 partition will not be changed
    2013-07-18 15:59:36 +0700:
    2013-07-18 15:59:36 +0700:           Partition 1
    2013-07-18 15:59:36 +0700:                     Name                    : “Mac”
    2013-07-18 15:59:36 +0700:                     Size                    : 101.93 GB
    2013-07-18 15:59:36 +0700:                     File system          : Mac OS Extended (Journaled)
    2013-07-18 15:59:36 +0700:                     Do not erase contents
    2013-07-18 15:59:36 +0700:
    2013-07-18 15:59:36 +0700:           Partition 2
    2013-07-18 15:59:36 +0700:                     Size                    : 398 GB
    2013-07-18 15:59:36 +0700:                     File system          : Free Space
    2013-07-18 15:59:36 +0700:
    2013-07-18 15:59:36 +0700: Beginning partition operations
    2013-07-18 15:59:36 +0700: Unmounting disk
    2013-07-18 15:59:36 +0700: Finishing partition modifications
    2013-07-18 15:59:36 +0700: Waiting for the disks to reappear
    2013-07-18 15:59:36 +0700: Partition complete.
    2013-07-18 15:59:36 +0700:
    2013-07-18 15:59:42 +0700: Preparing to partition disk: “APPLE SSD SM512E Media”
    2013-07-18 15:59:42 +0700:           Partition Scheme: GUID Partition Table
    2013-07-18 15:59:42 +0700:           1 partition will be created
    2013-07-18 15:59:42 +0700:
    2013-07-18 15:59:42 +0700:           Partition 1
    2013-07-18 15:59:42 +0700:                     Name                    : “Mac”
    2013-07-18 15:59:42 +0700:                     Size                    : 499.93 GB
    2013-07-18 15:59:42 +0700:                     File system          : Mac OS Extended (Journaled)
    2013-07-18 15:59:42 +0700:                     Do not erase contents
    2013-07-18 15:59:42 +0700:
    2013-07-18 15:59:42 +0700: Beginning partition operations
    2013-07-18 15:59:42 +0700: Verifying the disk
    2013-07-18 15:59:42 +0700: Checking file system
    2013-07-18 15:59:42 +0700: Performing live verification.
    2013-07-18 15:59:42 +0700: Checking Journaled HFS Plus volume.
    2013-07-18 15:59:42 +0700: Checking extents overflow file.
    2013-07-18 15:59:42 +0700: Checking catalog file.
    2013-07-18 15:59:53 +0700: Checking multi-linked files.
    2013-07-18 15:59:53 +0700: Checking catalog hierarchy.
    2013-07-18 15:59:53 +0700: Checking extended attributes file.
    2013-07-18 15:59:53 +0700: Checking volume bitmap.
    2013-07-18 15:59:53 +0700: Checking volume information.
    2013-07-18 15:59:53 +0700: The volume Mac appears to be OK.
    2013-07-18 15:59:53 +0700: Unmounting disk
    2013-07-18 15:59:53 +0700: Finishing partition modifications
    2013-07-18 15:59:53 +0700: Waiting for the disks to reappear
    2013-07-18 15:59:53 +0700: Growing disk
    2013-07-18 15:59:54 +0700: Partition complete.
    2013-07-18 15:59:54 +0700:
    2013-07-18 16:36:53 +0700: Disk Utility started.
    2013-07-18 16:37:07 +0700: Preparing to partition disk: “APPLE SSD SM512E Media”
    2013-07-18 16:37:07 +0700:           Partition Scheme: GUID Partition Table
    2013-07-18 16:37:07 +0700:           3 partitions will be created
    2013-07-18 16:37:07 +0700:
    2013-07-18 16:37:07 +0700:           Partition 1
    2013-07-18 16:37:07 +0700:                     Name                    : “Mac”
    2013-07-18 16:37:07 +0700:                     Size                    : 100 GB
    2013-07-18 16:37:07 +0700:                     File system          : Mac OS Extended (Journaled)
    2013-07-18 16:37:07 +0700:                     Do not erase contents
    2013-07-18 16:37:07 +0700:
    2013-07-18 16:37:07 +0700:           Partition 2
    2013-07-18 16:37:07 +0700:                     Name                    : “Mac 2”
    2013-07-18 16:37:07 +0700:                     Size                    : 298.93 GB
    2013-07-18 16:37:07 +0700:                     File system          : Mac OS Extended (Journaled)
    2013-07-18 16:37:07 +0700:
    2013-07-18 16:37:07 +0700:           Partition 3
    2013-07-18 16:37:07 +0700:                     Name                    : “BOOTCAMP”
    2013-07-18 16:37:07 +0700:                     Size                    : 101 GB
    2013-07-18 16:37:07 +0700:                     File system          : Windows NT File System (NTFS)
    2013-07-18 16:37:07 +0700:                     Do not erase contents
    2013-07-18 16:37:07 +0700:
    2013-07-18 16:37:07 +0700: Beginning partition operations
    2013-07-18 16:37:07 +0700: Verifying the disk
    2013-07-18 16:37:07 +0700: Checking file system
    2013-07-18 16:37:07 +0700: Performing live verification.
    2013-07-18 16:37:07 +0700: Checking Journaled HFS Plus volume.
    2013-07-18 16:37:07 +0700: Checking extents overflow file.
    2013-07-18 16:37:18 +0700: Checking catalog file.
    2013-07-18 16:37:19 +0700: Checking multi-linked files.
    2013-07-18 16:37:19 +0700: Checking catalog hierarchy.
    2013-07-18 16:37:19 +0700: Checking extended attributes file.
    2013-07-18 16:37:19 +0700: Checking volume bitmap.
    2013-07-18 16:37:19 +0700: Checking volume information.
    2013-07-18 16:37:19 +0700: The volume Mac appears to be OK.
    2013-07-18 16:37:19 +0700: Shrinking the disk
    2013-07-18 16:37:19 +0700: Unmounting disk
    2013-07-18 16:37:19 +0700: Finishing partition modifications
    2013-07-18 16:37:19 +0700: Waiting for the disks to reappear
    2013-07-18 16:37:20 +0700: Formatting disk0s5 as Mac OS Extended (Journaled) with name Mac 2
    2013-07-18 16:37:21 +0700: Initialized /dev/rdisk0s5 as a 278 GB HFS Plus volume with a 24576k journal
    2013-07-18 16:37:21 +0700: Mounting disk
    2013-07-18 16:37:21 +0700: Partition complete.
    2013-07-18 16:37:21 +0700:
    2013-07-18 16:37:35 +0700: Preparing to erase : “Data”
    2013-07-18 16:37:35 +0700:           Partition Scheme: GUID Partition Table
    2013-07-18 16:37:35 +0700:           1 volume will be erased
    2013-07-18 16:37:35 +0700:                     Name                    : “Data”
    2013-07-18 16:37:35 +0700:                     Size                    : 298.8 GB
    2013-07-18 16:37:35 +0700:                     File system          : ExFAT
    2013-07-18 16:37:35 +0700: Unmounting disk
    2013-07-18 16:37:35 +0700: Erasing
    2013-07-18 16:37:35 +0700: Volume name      : Data
    Partition offset : 195984280 sectors (100343951360 bytes)
    Volume size      : 583593064 sectors (298799648768 bytes)
    Bytes per sector : 512
    Bytes per cluster: 131072
    FAT offset       : 2048 sectors (1048576 bytes)
    # FAT sectors    : 18432
    Number of FATs   : 1
    Cluster offset   : 20480 sectors (10485760 bytes)
    # Clusters       : 2279580
    Volume Serial #  : 51e7b75f
    Bitmap start     : 2
    Bitmap file size : 284948
    Upcase start     : 5
    Upcase file size : 5836
    Root start       : 6
    2013-07-18 16:37:35 +0700: Mounting disk
    2013-07-18 16:37:35 +0700: Erase complete.
    2013-07-18 16:37:35 +0700:
    2013-11-07 13:52:44 +0700: Disk Utility started.
    2013-11-07 14:04:32 +0700:
              Name :           disk0s3
              Type :           Partition
              Disk Identifier :           disk0s3
              Mount Point :           Not mounted
              File System :           MS-DOS (FAT)
              Connection Bus :           SATA
              Device Tree :           IODeviceTree:/PCI0@0/SATA@1F,2/PRT0@0/PMP@0
              Writable :           Yes
              Capacity :           298.8 GB (298,799,648,768 Bytes)
              Owners Enabled :           No
              Can Turn Owners Off :           No
              Can Be Formatted :           Yes
              Bootable :           No
              Supports Journaling :           No
              Journaled :           No
              Disk Number :           0
              Partition Number :           3
    2013-11-07 14:26:36 +0700: Disk Utility started.
    2013-11-07 14:26:47 +0700: Verify and Repair volume “disk0s3”
    2013-11-07 14:26:47 +0700: Starting repair tool:
    2013-11-07 14:26:47 +0700: Checking file system2013-11-07 14:26:47 +0700: ** /dev/disk0s3
    2013-11-07 14:26:47 +0700: Invalid sector size: 0
    2013-11-07 14:26:47 +0700: Volume repair complete.2013-11-07 14:26:47 +0700: Updating boot support partitions for the volume as required.2013-11-07 14:26:47 +0700: Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.2013-11-07 14:26:47 +0700:
    2013-11-07 14:26:47 +0700: Disk Utility stopped repairing “disk0s3”: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
    2013-11-07 14:26:47 +0700:
    2013-11-07 14:27:21 +0700: Verifying volume “disk0s3”
    2013-11-07 14:27:21 +0700: Starting verification tool:
    2013-11-07 14:27:21 +0700: Checking file system2013-11-07 14:27:21 +0700: ** /dev/disk0s3
    2013-11-07 14:27:21 +0700: Invalid sector size: 0
    2013-11-07 14:27:21 +0700: Error: This disk needs to be repaired. Click Repair Disk.2013-11-07 14:27:21 +0700:
    2013-11-07 14:27:21 +0700: Disk Utility stopped verifying “disk0s3”: This disk needs to be repaired. Click Repair Disk.
    2013-11-07 14:27:21 +0700:
    2013-11-07 14:27:30 +0700: Verify and Repair volume “disk0s3”
    2013-11-07 14:27:30 +0700: Starting repair tool:
    2013-11-07 14:27:30 +0700: Checking file system2013-11-07 14:27:30 +0700: ** /dev/disk0s3
    2013-11-07 14:27:30 +0700: Invalid sector size: 0
    2013-11-07 14:27:30 +0700: Volume repair complete.2013-11-07 14:27:30 +0700: Updating boot support partitions for the volume as required.2013-11-07 14:27:30 +0700: Error: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.2013-11-07 14:27:30 +0700:
    2013-11-07 14:27:30 +0700: Disk Utility stopped repairing “disk0s3”: Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
    2013-11-07 14:27:30 +0700:
    2013-11-07 14:32:17 +0700:
              Name :           APPLE SSD SM512E Media
              Type :           Disk
              Partition Map Scheme :           GUID Partition Table
              Disk Identifier :           disk0
              Media Name :           APPLE SSD SM512E Media
              Media Type :           Generic
              Connection Bus :           SATA
              Device Tree :           IODeviceTree:/PCI0@0/SATA@1F,2/PRT0@0/PMP@0
              Writable :           Yes
              Ejectable :           No
              Location :           Internal
              Solid State Disk :           Yes
              Total Capacity :           500.28 GB (500,277,790,720 Bytes)
              Disk Number :           0
              Partition Number :           0
              S.M.A.R.T. Status :           Verified
              Raw Read Error :           000000000000
              Reallocated Sector Count :           000000000000
              Power On Hours :           0000000003B2
              Power Cycle :           000000000DD0
              Temperature :           004F00040027
              UDMA CRC Error (PATA only) :           000000000000
    2013-11-07 14:39:58 +0700:
              Name :           disk0s3
              Type :           Partition
              Disk Identifier :           disk0s3
              Mount Point :           Not mounted
              File System :           MS-DOS (FAT)
              Connection Bus :           SATA
              Device Tree :           IODeviceTree:/PCI0@0/SATA@1F,2/PRT0@0/PMP@0
              Writable :           Yes
              Capacity :           298.8 GB (298,799,648,768 Bytes)
              Owners Enabled :           No
              Can Turn Owners Off :           No
              Can Be Formatted :           Yes
              Bootable :           No
              Supports Journaling :           No
              Journaled :           No
              Disk Number :           0
              Partition Number :           3
    2013-11-07 14:43:11 +0700: Disk Utility started.
    Thanks for help

    You CAN'T have 3 partitions on your Mac and have the Windows install work. Windows only allows 4 Primary partitions on any one physical hard drive. Since you created a exFAT partition you have past that Windows limit.
    One partition for OS X, one for Windows, one for the OS X Recovery HD and the forth for the EFI. Now that you have created a so called Data partition windows will no longer boot.
    You are basically TOAST and might need to start over with a total wipe, Re-Partitioning, of the drive then reinstall OS X and you programs and files then reinstall Windows program and files and then do not try fooling with the partitions again, any of them on the OS X or Windows side, because if you do Windows again will not boot.

  • Windows borked my external drive's partition map

    I have two partitions on my 1 TB external drive, a ~750 GB HFS+ partition full of huge files (games, iTunes, etc.) and a 150 GB NTFS partition for Steam games (derp TF2 derp). The hard drive was originally in GPT, but now is in MBR due to Windows being... unkind.
    While trying to create the NTFS partition, Windows 7's Disk Management asked me to convert the partition map to a "simple" partition scheme. I obliviously clicked OK and let it do its thing, then moved my Steam games over to the new NTFS partition and played TF2 for a few weeks. When I finally rebooted into OS X, I wondered why the two partitions weren't appearing on my desktop, and so I opened up Disk Utility, looked at my external HD's description and immediately started spewing out expletives. The disk reported as having one 1 TB "Windows_LDM" partition (Windows says otherwise, with the NTFS partition being recognized and the HFS+ not appearing anywhere) with MBR instead of GPT.
    Disk Warrior and Drive Genius both refuse to do anything, since it doesn't report an HFS/HFS+ partition. Disk Management in Windows won't let me change it back to GPT. Be there anything I CAN do?
    Here's the DU Command-I output of the HD:
    Name : WD
    Type : Disk
    Partition Map Scheme : Master Boot Record
    Disk Identifier : disk1
    Media Name : WD My Book Media
    Media Type : Generic
    Connection Bus : FireWire
    Connection ID : 40718345779727391
    Device Tree : IODeviceTree:/PCI0@0/PCIB@1E/FRWR@3/node@90a91ea80acc1f/sbp-2@c000
    Writable : Yes
    Ejectable : Yes
    Location : External
    Total Capacity : 1 TB (1,000,204,886,016 Bytes)
    S.M.A.R.T. Status : Not Supported
    Disk Number : 1
    Partition Number : 0
    And of the "partition":
    Name : disk1s1
    Type : Volume
    Disk Identifier : disk1s1
    Mount Point : Not mounted
    Connection Bus : FireWire
    Device Tree : IODeviceTree:/PCI0@0/PCIB@1E/FRWR@3/node@90a91ea80acc1f/sbp-2@c000
    Writable : Yes
    Capacity : 1 TB (1,000,203,836,928 Bytes)
    Owners Enabled : No
    Can Turn Owners Off : No
    Can Be Formatted : No
    Bootable : No
    Supports Journaling : No
    Journaled : No
    Disk Number : 1
    Partition Number : 1
    ...Help?

    You cannot convert the drive's partition map back to GPT without repartitioning the entire drive. I doubt you can change it even using a Windows or Linux partitioning tool. Even if you could the other partition is probably lost.

  • Disk Utility - Partition map needs repair because a data partition needs loader space.

    I just finished setting up both my OSX and Windows installs from scratch after fitting an SSD, which in-turn was right before my logic board died and Apple replaced it, now it looks like I have some sort of hard drive issue brewing.
    This was my plan for the SSD, and how it currently displays in Disk Utility although that wasn't the case earlier:
    And in Terminal:
    My intention was to have two boot partitions for each OS, 'Macintosh HD' and 'Win 7 Pro' and a third shared data partition 'Projects' on the SSD, which I made in Drive Genius after installing Boot Camp. I don't want Macintosh HD accessible from Windows because I'll be using Paragon HFS+ or MacDrive to give write access and don't want OSs stomping on other OSs turf, hence needing three partitions. Everything looked fine until I just checked Disk Management under windows and realised it couldn't see the Projects volume. Even though it's fine in OS X, it was just marked black/unallocated space.
    So I booted back into OSX, all my files look fine so I ran Disk Utility and the Partition tab looked really odd - unfortunately I didn't get a screenshot. All volumes reported their size correctly but visually, Macintosh HD took up most of the drive. I could see 'Windows 7 Pro' under this, but the Partition Layout section had a scrollbar, which if I scrolled down showed 'Projects' squished into a tiny gap at the bottom. I ran a Verify, which reported no problems, and at some time since the Partition Layout has reverted to how it should look (as in the screenshot above), with 'Projects' book-ended by "Macintosh HD' and 'Windows 7 Pro'.
    Now when I run a Verify on Macintosh HD or Projects volumes, it says there's no problem, but if I run one on the drive, I get this message:
    Volume Macintosh HD on disk0s2 has 0 bytes of trailing loader space and it needs 134217728 bytes
    Problems were found with the partition map which might prevent booting
    Error: Partition map needs repair because a data partition needs loader space.
    I've only managed to find one other mention of this error here, but the fix is not relevant to me because I don't have Sophos installed. I've tried Single User/Safe Mode but it just boots into normal mode, so I can't do a fsck -fy.
    ** /dev/rdisk0s2 (NO WRITE)
    Can't open /dev/rdisk0s2: Permission denied
    That value in bytes is exactly 128mb, so I suspect the problem lies with one of the invisible partitions that show up in iPartition and Disk Management under Windows, but not in Disk Utility. I have backups and I suspect the root of the problem is partitioning in iPartition after installing Boot Camp, but I've never had issues with this approach in the past so I'm wary of just giving up and reinstalling Windows again will be massive hassle because I no longer have a SuperDrive and last time it refused to install from USB.
    Anyone have any idea what's going on? It seems like the sort of issue Disk Utility should just handle, at least in Recovery mode, but it's not playing ball. It also doesn't seem like a massive problem since my files all look fine and performance is OK, so I'm reluctant to do anything major.
    I'll update with a shot of the drive in Disk Management from Windows in a few minutes, in case that sheds light on anything. Thanks!

    Similar issue here. I manually partitioned my hard disk for triple boot (using Gparted on Linux), then everything was just fine until I ran bootcamp, to do something as simple as create a boot USB.
    I get the same error as a result and have to work my way into booting, by resorting first to a Linux live USB, then restarting from the live USB, to finally reach my rEFInd boot manager, or whichever boot manager should be initialized at startup.
    I suppose that the cause in my case is that some operation "scratched" the protective MBR. See this:
    http://www.mactech.com/articles/mactech/Vol.23/23.03/APMtoGPT/index.html
    I am hoping to fix it using an external Yosemite installation media: see this guide -
    http://www.macworld.com/article/2367748/how-to-make-a-bootable-os-x-10-10-yosemi te-install-drive.html
    And as a last resort to reinstall.
    I'll admit I am negatively surprised. I need this computer for professional reasons, and for the sake of "preserving the integrity of OSX", measures defined by Apple instead tend to make partitions far easier to damage. And this problem seems to affect a number of users.
    As for what I have to go through to fix it: a 5GB download, during which I have to register my credit card to the Apple Store. "Pay first, get your free software next."
    IF Disk Utility can fix it, from the external media, then fair enough. The hassle is unpleasant but it files as "a choice".
    Otherwise you can file it safely under software design calamity.

  • External Hard Disc won't mount - Partition Map error.  Can't repair with Disk Utility

    Happy New Year all and thanks in advance for any support/advise.
    I have some important data on an external drive that does not seem to want to mount.  The drive is a 500 GB Seagate connected via USB.  I am currently on an iMac 3.06 GHz Intel Core 2 Duo running Yosemity 10.10.1
    What I've tried:
    Multiple computers - connected the drive to various apple computers with the same result.
    New enclosure:  I have removed the actual HD from the enclosure and connected it using a new one.
    Disk Utility:  Verifying Disc reports the following error:  'Error: Partition map check failed because no slices were found.'  Screenshot below:
    I have searched this and other forums and run a few commands in Terminal that seem relevant to the issue, but am out of my depth in terms of interpreting the results.  Thank again for your attention!!!
    Commands run in Terminal:
    diskutil list
    diskutil cs list
    mount
    diskutil info disk1
    Full Results pasted below:
    diskutil list...
    Ethan-Smiths-iMac:~ Ethan$ diskutil list
    /dev/disk0
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:      GUID_partition_scheme                        *1.0 TB     disk0
       1:                        EFI EFI                     209.7 MB   disk0s1
       2:                  Apple_HFS Macintosh HD            999.3 GB   disk0s2
       3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
    /dev/disk1
       #:                       TYPE NAME                    SIZE       IDENTIFIER
       0:      GUID_partition_scheme                        *500.1 GB   disk1
       1:         Microsoft Reserved                         134.2 MB   disk1s1
    diskutil cs list...
    Ethan-Smiths-iMac:~ Ethan$ diskutil cs list
    No CoreStorage logical volume groups found
    mount...
    Ethan-Smiths-iMac:~ Ethan$ mount
    /dev/disk0s2 on / (hfs, local, journaled)
    devfs on /dev (devfs, local, nobrowse)
    map -hosts on /net (autofs, nosuid, automounted, nobrowse)
    map auto_home on /home (autofs, automounted, nobrowse)
    diskutil info disk1...
    Ethan-Smiths-iMac:~ Ethan$ diskutil info disk1
       Device Identifier:        disk1
       Device Node:              /dev/disk1
       Part of Whole:            disk1
       Device / Media Name:      ST950032 5AS Media
       Volume Name:              Not applicable (no file system)
       Mounted:                  Not applicable (no file system)
       File System:              None
       Content (IOContent):      GUID_partition_scheme
       OS Can Be Installed:      No
       Media Type:               Generic
       Protocol:                 USB
       SMART Status:             Not Supported
       Total Size:               500.1 GB (500107862016 Bytes) (exactly 976773168 512-Byte-Units)
       Volume Free Space:        Not applicable (no file system)
       Device Block Size:        512 Bytes
       Read-Only Media:          No
       Read-Only Volume:         Not applicable (no file system)
       Ejectable:                Yes
       Whole:                    Yes
       Internal:                 No
       OS 9 Drivers:             No
       Low Level Format:         Not supported

    Select the disk1s1 volume under the main drive entry, then click on the Mount icon in the Disk Utility toolbar if it goes active and see if a volume then mounts on your Desktop. If it does not, then you need to reformat the drive. And, you cannot access the volume in order to copy your data somewhere else. If you are willing to spend money on the problem, then you can always try using a software recovery utility:
    General File Recovery
    If you stop using the drive it's possible to recover deleted files that have not been overwritten by using recovery software such as MAC Data Recovery, Data Rescue II, File Salvage or TechTool Pro.  Each of the preceding come on bootable CDs to enable usage without risk of writing more data to the hard drive.  Two free alternatives are Disk Drill and TestDisk.  Look for them and demos at MacUpdate or CNET Downloads. Recovery software usually provide trial versions that enable you to determine if the software would help before actually paying for it. Beyond this or if the drive has completely failed, then you would need to send the drive to a recovery service which is very expensive.
    The longer the hard drive remains in use and data are written to it, the greater the risk your deleted files will be overwritten.
    Also visit The XLab FAQs and read the FAQ on Data Recovery.

  • The startup disk cannot be partitioned or restored to a single partition

    Am trying to install Windows 7 using Boot Camp. Am receieving the following message in Boot Camp "The startup disk cannot be partitioned or restored to a single partition"
    In Disk Utilty, I get the following message after clicking Verify Disk and Repair Disk buttons
    Problems were found with the partition map which might prevent booting
    Error: Parition map check failed becuse no slices were found
    Any solution for above message?

    You will need to repartition your drive:
    You will have to backup your OS X partition to an external drive, boot from the external drive, use Disk Utility to repartition and reformat your hard drive back to a single volume, then restore your backup to the internal hard drive.
    Get an empty external hard drive and clone your internal drive to the external one.
    Boot from the external hard drive.
    Erase the internal hard drive.
    Restore the external clone to the internal hard drive.
    Clone the internal drive to the external drive
    Open Disk Utility from the Utilities folder.
    Select the destination volume from the left side list.
    Click on the Restore tab in the DU main window.
    Check the box labeled Erase destination.
    Select the destination volume from the left side list and drag it to the Destination entry field.
    Select the source volume from the left side list and drag it to the Source entry field.
    Double-check you got it right, then click on the Restore button.
    Destination means the external backup drive. Source means the internal startup drive.
    Restart the computer and after the chime press and hold down the OPTION key until the boot manager appears.  Select the icon for the external drive and click on the downward pointing arrow button.
    After startup do the following:
    Erase internal hard drive
    Open Disk Utility in your Utilities folder.
    After DU loads select your internal hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area.  If it does not say "Verified" then the drive is failing or has failed and will need replacing.  SMART info will not be reported  on external drives. Otherwise, click on the Partition tab in the DU main window.
    Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Set the format type to Mac OS Extended (Journaled.) Click on the Options button, set the partition scheme to GUID then click on the OK button. Click on the Partition button and wait until the process has completed.  Do not quit Disk Utility.
    Restore the clone to the internal hard drive
    Select the destination volume from the left side list.
    Click on the Restore tab in the DU main window.
    Check the box labeled Erase destination.
    Select the destination volume from the left side list and drag it to the Destination entry field.
    Select the source volume from the left side list and drag it to the Source entry field.
    Double-check you got it right, then click on the Restore button.
    Destination means the internal hard drive. Source means the external startup drive.
    Note that the Source and Destination drives are swapped for this last procedure.

Maybe you are looking for