Cannot Recognize Drive / Deleted Partition Mapping?

So, I was moving partitions in VolumeWorks and accidentally ejected the Lacie Disk. Now whenever I try to use it i get this:
[img]http://img141.imageshack.us/img141/4281/erroram9.jpg[/img]
I clicked initialize once, but I closed DiskUtility and it never had time to do anything. I know this because I can still use DataRescue to get my files. The problem is, the files will not be named or organized correctly! On diskutility, it will NOT let me mount the the drive (although it still shows the icon on disk util) so I cannot repair it. Please help!
Edit:
Shoot, apparently initializing it removes the partition map :O. How can I get the partition structure back in place?
Message was edited by: ParkerKuivila

Hi! Diskwarrior under 10.4 is about the only app that "might" reconstruct the directory. Otherwise using the data recovery software you mentioned is your other possibility. Tom

Similar Messages

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.

How to low-level format entire drive, including partition map?

Hi everyone,
I have an OWC-supplied, 80 GB, ATA hard drive (OWC Neptune), which originally shipped in an external, FireWire 400 case. The drive stopped working; disassembly of the case led to the discovery of a burned trace on the Oxford bridge. While the bare drive itself has no manufacturer name, its label style and model number listed on the drive clearly show it to be a Maxtor 6Y080L0, 80 GB.
Having removed the drive and installed it into a test Power Mac G4, the physical drive is recognized by Disk Utility (albeit with no partitions, mounted or otherwise). The drive emits "normal" power and spin-up sounds, with no clicking or other sounds that might normally indicate a failed drive. However, Disk Utility is unable to actually partition the drive—when attempted, the "Creating Partition" progress bar advances to about 1/8 of the way across, then moves no further (even if many hours are allowed to pass). Console reveals nothing as to what is stopping the format.
Moving further, I attempted to blow away the partition map with pdisk, but encountered several read errors in the partition map itself. I even went so far as to attempt to "build" a partition map, one partition at a time, based on the settings I found on an identical drive that is functioning properly. Although this seemed semi-successful, attempting to write the partition table again resulted in a couple of errors.
pdisk: Unable to write block 8 (Input/output error)
pdisk: Unable to write block 9 (Input/output error)
pdisk: Unable to write block 10 (Input/output error)
pdisk: Unable to write block 11 (Input/output error)
While it's entirely possible that the blown component on the FireWire bridge might have also taken out the drive, I'm not a big believer in coincidence and my thought is that the trace blew during an access of the partition map, corrupting it to the point that only a low-level format of that portion of the drive can potentially salvage it. There is no data on the hard drive I am worried about losing, but I'm not one to easily say "die" and so I'd like to be able to restore this drive to functionality, if at all possible.
So after setting the table for you here, my questions are as follows:
1. Is there any way to low-level format an entire drive that does not have a readable partition map? In essence, effectively returning the drive to something resembling an out-of-box, unformatted state? CLI is fine, and I'm even open to trying to throw the thing in a PC box, install Yellow Dog Linux so as to have GUI access to pdisk, etc.
2. Does anyone have any other suggestions for me regarding this matter?
Thanks much for the time,
MBJ

Thanks to all for the suggestions. I'm about to give up on it, although I will try the PowerMax software recommended by Michael Black.
And The hatter: Don't let this burn you on Neptune drives—one of my client offices has been using about 20 of them for the past couple of years now, on a daily basis, for large-scale imaging projects, and the little drives have been real champs. We're even using them to dual-boot both Intel- and PPC-based systems, and they've just been outstanding. Methinks the component failure probably cascaded down to the drive, and while yes, it *****, such things happen in any batch of components and I'd buy another Neptune today if I had the need for yet another external.
As for Matt Broughton: S.M.A.R.T. shows no problems when the drive is connected directly to the ATA bus. But then again, I've only run into a few drives that S.M.A.R.T. has ever reliably reported on—it's still a black art, to be sure. The WikiPedia article on S.M.A.R.T. goes into more detail about its pervasive flakiness.
For now, the drive has begun to beep about once every 2 seconds at boot. This lasts for about 30 seconds, after which the drive continues to spin but no further beeping is heard. The drive no longer shows up in Disk Utility, even as an unmounted drive/volume. So, I'll probably try it in a PC w/PowerMax just to say that I did, but beyond that, it's probably ready for disassembly as an example drive.
80 GB—sniffle…
Thanks again to all for your suggestions!
Take care,
MBJ

I cannot recover accidentally deleted partition.

When I tried to install windows 7 through the boot camp assistant, I accidentally deleted a partition of 200gb. I think it was #1. How can I recover it in os x 10.9? The OS X 10.9 shows 200gb less the total hard-drive space. Thanks.

If the photots weren't backed up, there's no way to recover them.

4096 byte sector Drives vs 512 byte Drives and Partition Map integrity

I have a late 2008 Mac Pro, and every so often, if I don't take the time to Defragment my startup drive, or go over it with Disk Warrior, my partition takes a dump. Normally its a invalid file count, invalid directory count, invalid volume structure, or some combination in between. I don't think its the drive or the mac itself (at work we have 200+ macs of various years and models that do this too) since it only happens to the startup drive (1TB-56% full) and I've had apple replace them 2 times now, along with a replacement machine and it still happens. I was wondering if the GUID would be happier on a new 4096 byte sector drive assuming the mac would even be able to use it. Buried deep in the developer site is a tec note that says Mac OS 10.4 and up are able to use the drive, but I haven't been able to find out if anyone outside of Western Digital has actually used them on a mac yet. No one at AppleCare seems to have an answer to my question, or can explain why my map fails regardless of drive.
http://developer.apple.com/mac/library/technotes/tn2006/tn2166.html

I've created a new topic with the same name in its proper location under Mac Pro (previous to 2009) rather than this one.

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).

Install error : disk cannot be used to start up your computer [or] MediaKit reports partition (Map) too small

Greetings,
I am aware that this problem has been discussed, but in long and vague discussions that I had to sift deeply to find an answer. Therefore I am posting a clear message, as this problem can be very troublesome for someone who just received a Mac OS installation disk and cannot install it.
Situation : you cannot install/update your new system because the installer does not consider your volume.
Error message : this disk cannot be used to start up your computer.
Version française : Ce disque ne peut pas être configuré pour démarrer votre ordinateur.
Also discussed below error: "MediaKit reports partition (Map) too small"
Note : although this occurred with a Snow Leopard (10.6) install DVD, it can alo occur with Lion (10.7) according to discussions on Apple web site.
IF YOUR CONDITIONS ARE AS FOLLOWS :
- You are using an official Apple installation DVD of Mac OS 10.6 (Snow Leopard) [or 10.7 Lion] or an official download/upgrade of those systems.
- Your main Mac partition scheme is in GUID as it should be (check with Disk Utility). That partition contains a Mac system that can start-up.
- Your volume format is: Mac OS Extended (journaled) [the format should not be Case Sensitive.]
- You have the hardware requirements to install Mac OS 10.6 (Intel processor; internal or external DVD drive or a linked DVD drive; 1 GB of RAM; a screen controlled by your computer graphics card; at least 5 GB space on the hard disk or 7 GB if you install all components).
- Using Disk Utility, you of course tried the disk Repair Tool and the Repair Permissions tool.
- Your hard disk does not have a file called Backups.backupdb (if it does, this means Time Machine has once used this hard disk for its back-ups). Anyhow, if it were the case, the installation would give a different error message (with the word TimeMachine). This file may block the installation: Apple Support suggest to place it in the garbage, *without* deleting it, and placing it back on the disk later. Mind you, if you do not use this hard disk as such to save your Time Machine back-ups, you can simply delete this file.
HOW TO FIX :
1. Boot with the 10.6 install DVD (Tip: you can either select Mac 10.6 as the boot DVD in your Start-up Preferences or simply press down c during the start-up).
2. Above the install screen, you have a Utilities tab from where you can run Disk Utility. Select your hard disk and select the Partition tab. Resize the primary Mac partition (don't add a new one) by decreasing it by about 5 GB.
It will look like this http://i.imgur.com/jHTbr.jpg
( That image shows only one partition, but the same principle applies even if you have two or more partitions on your disk.)
Also see the official Apple how to: http://support.apple.com/kb/TS3926
Version française: http://support.apple.com/kb/TS3926?viewlocale=fr_FR
3. Commit the change by hitting "Apply"
3.b. If you get the error "MediaKit reports partition (Map) too small", this is a rare error where the partition that follows (for example Bootcamp) is slightly overlapping your main Mac partition. You will need to reduce that other following partition. Once you have reduced the other partition, you will probably need to return to step 2 and 3 and try again.
[ For example, in my case, I had resized my Bootcamp with CampTune software and it would seem that the file system ended-up somehow larger than the actual partition container. I simply asked CampTune to reduce the partition a bit (barely 2 GB) and that fixed it.]
4. Reboot, again into the 10.6 install DVD.
5. You can then install 10.6.
6. Once 10.6 is installed, use the Disk Utility on the desktop (you can boot into the primary HD at this point) to resize the primary partition back to its original or maximum size.
SOURCE (main fix): http://forums.macrumors.com/showthread.php?t=774410 [and] http://support.apple.com/kb/TS3926
SOURCE (explaination for MediaKit error): some Apple discussion post.
nb: in my case, it was on a MacBook Pro (late 2008).

GasMan4932 wrote:
When I click on the icon for this drive, the warning message below states "Mac OS X cannot be installed on 'iMac HD', because this disk cannot be used to start up your computer." Obviously that's not true, since that's where the OS is installed.
How did you partition this drive, if you did that? Does it contain start up or utility partitions for any other OS (for instance Linux)? There have been reports that the "cannot be used to start up your computer" message will appear if a third party utility was used to create a 'triple boot' system or such, apparently because SL is picky about the format GUID partition scheme table info & how partitions are allocated space on the drive by other formatting/partition methods.
For some users with these partitions, the fix has been as simple as "tickling" (slightly changing) the partition size of some partition with Disk Utility, which apparently updates the GUID partition scheme table info so that the SL installer accepts it as safe to use with SL.( In this sense, the message may be trying to say the installer thinks the disk can't be used to reliably start up your computer with SL, not in general.)
See the discussions topic Cannot install Snow Leopard over 10.5.8 for more about this.

Can't install OSX Mountain Lion, on the disk selection screen i cant select the Macintosh HD to install OSX giving a message (This disk cannot be used to start up your computer).only have one disk to select and my partition map scheme is GUID partition

just bough OSX Mountain Lion, my laptop operating with v10.6.8. Can't install OSX Mountain Lion, on the disk selection screen i cant select the Macintosh HD to install OSX giving a message (This disk cannot be used to start up your computer).only have one disk to select and my partition map scheme is GUID partition table. 24.44gb disk available.

Verify your computer can run Mountain Lion:
Upgrading to Mountain Lion
To upgrade to Mountain Lion you must have Snow Leopard 10.6.8 or Lion installed. Purchase and download Mountain Lion from the App Store. Sign in using your Apple ID. Mountain Lion is $19.99 plus tax. The file is quite large, over 4 GBs, so allow some time to download. It would be preferable to use Ethernet because it is nearly four times faster than wireless.
     OS X Mountain Lion - System Requirements
       Macs that can be upgraded to OS X Mountain Lion
         1. iMac (Mid 2007 or newer) - Model Identifier 7,1 or later
         2. MacBook (Late 2008 Aluminum, or Early 2009 or newer) - Model Identifier 5,1 or later
         3. MacBook Pro (Mid/Late 2007 or newer) - Model Identifier 3,1 or later
         4. MacBook Air (Late 2008 or newer) - Model Identifier 2,1 or later
         5. Mac mini (Early 2009 or newer) - Model Identifier 3,1 or later
         6. Mac Pro (Early 2008 or newer) - Model Identifier 3,1 or later
         7. Xserve (Early 2009) - Model Identifier 3,1 or later
To find the model identifier open System Profiler in the Utilities folder. It's displayed in the panel on the right.
Open Disk Utility and verify the drive is partitioned using GUID and formatted Mac OS Extended, Journaled. If it is then do this:
Repair the Hard Drive and Permissions
Boot from your Snow Leopard Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
If DU reports errors it cannot fix, then you will need Disk Warrior and/or Tech Tool Pro to repair the drive. If you don't have either of them or if neither of them can fix the drive, then you will need to reformat the drive and reinstall OS X.
Now try installing Mountain Lion.

Seagate external drive: Partition map check failed because no slices were found

I have a 3TB Seagate Expansion external backup drive connected to my Retina Macbook Pro via USB. The disk will not eject from a regular Finder window - it will only eject from Disk Utility. Backups seem to otherwise be running fine. I tried to verify/repair the disk in Disk Utility, and I got the following error: "Partition map check failed because no slices were found." I am able to verify/repair the partition without any problem, and no errors are found.
I'm concerned about relying on a backup drive that may be heading south. Here is the output from diskutil info:
diskutil info disk3
   Device Identifier:        disk3
   Device Node:              /dev/disk3
   Part of Whole:            disk3
   Device / Media Name:      Seagate Expansion Desk 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:               3.0 TB (3000592977920 Bytes) (exactly 5860533160 512-Byte-Units)
   Volume Free Space:        Not applicable (no file system)
   Device Block Size:        4096 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

@ Allan Eckert: Unfortunately, reformatting is out of the question, I have 5 years of work on this!
@ Loner T: Yes, the firmware did successfully upgrade after router reboot and a bit of troubleshoot.
Thanks for the quick replies. Keep 'em coming!

Cannot recognize any internal hard drives, hard drives good

Hi,
My macbook pro 13" (bought in august 09) recently stopped being able to recognize its internal drive. I've run it through all sorts of diagnostic software, but none has been able to recognize it at all.
I've tried swapping out the hard drive to one that is brand new, but it still cannot recognize it. Everything is physically connected as it should be, and I'm running out of ideas for what to try.
I do not have easy access to an apple store to bring it in. If it is the only option, I could try to get it to one. Does anybody have any suggestions? Does this seem like a hardware problem that would need to be repaired?
Thank you,
Jack

Hi Jack,
It sounds like you have done a good job of troubleshooting. At this point we know you have a hardware issue. Fortunately you are still under the MacBook's hardware warranty, so Apple should repair it without cost to you.
Apple's retail stores are not the only source for service. Two other options available to you are 1) [Apple authorized service providers|http://solutionprofessionals.apple.com/aasp> and 2) call Apple (800-275-2273 in the USA) and set up mail in service.

Can I keep my Lightroom 3 catalog on a PowerMac hard drive with Apple Partition Map

I want to keep my LR3 catalog on a HD in my Power Mac (Intel chip) that I had formatted and used to store my pre-LR3 photo folders on my G5 tower. The 1TB drive is half full, and was formatted as an Apple Partition Map. On swapping the drive into an empty bay in my Power Mac, I can open photos saved on the drive, although I can't seem to rename them. I created my brand new LR3 catalog on the drive as well, but haven't done anything other than import the LR3 catalog I had already created and exported from my MacBook. Other than the drive not being bootable on my Intel Power Mac, are there any risks to managing my LR3 catalog from this drive? Or should I only keep my LR3 catalog on a GUID partitioned drive?
This HD is not of course my startup drive, but only to be used to store my photos.

Oops, I should have used "Mac Pro" to describe my Intel machine, not "Power Mac"

2 Different Partition Map Scheme's for one external hard drive

Is it possible to have one external hard drive with 2 different Partition Map Scheme's?
One of them will be used to externally boot tiger on a powerpc, and the other for use on my macbook pro?

And this drive is currently not partitioned I take it ?
You need to make a backup of the data on the drive then partition it, the first partition must be set under Disc Utility / Partition / Options as Mac GUI Bootable so it installs the drivers, then install Tiger onto the first partition and move your current data back onto the second one.
You will then be able to Boot Tiger on the older PowerBook by holding down 'option' at start up, if you just have it connected to the MacBook Pro and start up normally then it will appear as two volumes on your Desktop, the Tiger Boot Volume and your Data Volume.

External drive error, does not mount: "Partition map check failed because no slices were found"

Hardware: MacBook late 2009 (2.26Ghz Core 2 Duo 2 GB RAM 250GB HDD) running 10.9.4, Hackintosh MacPro (3.29Ghz i3 16GB RAM 1TB HDD) running 10.9.4, external 3 TB Seagate Backup+ drive
As you can can see from the screenshot below,
The external drive was initially plugged in a Netgear WNDR4500 router by USB to be used as NAS. I was in the middle of updating the firmware when there was a power outage. Upon reboot, the drive no longer mounts, whatever it is plugged in (router, Mac, PC, etc.).
I ran DiskUtility on the partition map and volume, same errors. Here's an what I see:
As you can see above, the "Mount" icon is greyed out and I get the error message "Partition map check failed because no slices were found". If I select "the Archive" partition, the "Mount" icon is not greyed out but clicking it doesn't do anything. My HDD is basically unreadable.
I issued a few Terminal commands to see what was the problem, here are the results:
What can I do?
Currently running analysis on TestDisk and it is 50% after 48hrs. Need some help!

@ Allan Eckert: Unfortunately, reformatting is out of the question, I have 5 years of work on this!
@ Loner T: Yes, the firmware did successfully upgrade after router reboot and a bit of troubleshoot.
Thanks for the quick replies. Keep 'em coming!

When i was partitioning my hard drive i ran out of power (so it closed in the middle of the process). now when i try to partition it says Couldn't modify partition map because file system verification failed.

When i was partitioning my hard drive i ran out of power (so it closed in the middle of the process). now when i try to partition it says Couldn’t modify partition map because file system verification failed.

You'll have to select the entire external hard drive by the hardware name itself and then apply a new partition table to it under the Partition tab of Disk Utility. Erase and format the drive.
GUID for OS X.

Cannot Access the Service Partition after installing Lenovo Driver and Application Installation

I recently upgraded my Lenovo 3000 H210, M/T 5355-2NU from Windows Vista Home Premium (64-bit) to Windows 7 Home Premium (64-bit) with the media received through the Windows 7 Home Premium Upgrade Fulfillment Program.
I installed the 64-bit version of the Common Components Installation v1.0.0.8 and restarted the computer and then installed the 64-bit version of the Lenovo Driver and Application Installation program, v5.1.0.0900. After
restarting the computer, I receive a message box stating "Cannot access the Service Partition". If I click on
Lenovo Driver and Application Installation on the Start Menu, I receive an error that the installation has not
completed. Restart to complete the installation. If I restart the computer, I am back to the first error.
Any idea how to resolve this situation?
Any help is greatly appreciated. Thanks in advance.
-Larry

I am having the exact same problem. It's driving me nuts. I also downloaded and attempted to reinstall the factory software from Lenovo's site. It installs but will not launch, giving me the following error message: "This software is for intallation on a Lenovo computer." Or words to that effect.
Hopefully someone knows the answer. Tried tech support twice. Ugh... Thanks in advance.
Lenovo 3000 H210 Desktop, 64-bit, Intel E5200 Duo Core, 4GB RAM, 320 GB Hard Drive

Cannot Recognize Drive / Deleted Partition Mapping?

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