Recovery/Disk Utility/Verifying Partition

Hello and thanks in advance for any help you can offer!
My 1 year old started typing away as I booted up my laptop yesterday morning (MacBook Pro). Somehow she sent me into Recovery Mode and I can't get out. I haven't used Time Machine, I can't reinstall osx via the internet because my backup harddrive is the only one visible, and now (not initially) when I try to verify in Disk Utility so that I can back up via external drive the partition (disk0s2) has errors. I foolishly tried to find answers and terminal command fixes so I don't know if I've irreparable caused damage that way. The errors I receive when I try to verify and fix the partition: invalid content in journal; invalid b-tree node sizes; volume could not be verified completely; invalid content in journal; error: disk utility can't repair disk... M'aidez!

When I reboot this way (holding down Shift) I do get returned to Recovery Mode. In Disk Utility, here are the drives listed:
500.11 GB Apple HDD...Media
disk0s2
HL-DT-ST DVDRW
disk1
OS X Base System
disk0s2 can't be verified...I get these errors when I try to verify or repair:
Invalid content in Journal
Invalide b-tree node sizes
volume could not be verified completely
invalid content in journal
error: disk utility can't repair disk

Similar Messages

Question on Disk Utility Verify

I have a two-week old 27" iMac, 1 TB SSD, 32 GB RAM, 1 4 GB RAID-0 external G-Drive (external Max OS drive), 2 4 GB external G-Drives (1 used as partitioned backup (1 TB for Boot Camp, 3 TB for Time Machine), 1 planned for Windows external drive). I also bought and installed the Paragon NTFS and CampTune applications.
Have setup Boot Camp on the internal 1 TB SSD (127 GB partition) and finally got things to work, but, I am continually having issues with WIndows crashing (either in the middle of use, or during startup or shutdown with the KERNEL_SECURITY_CHECK_FAILURE. I have been Googling, and this seems associated with the use of external drives?
The last time I got this, I was unable to boot back into Mac partition, and ended up having to hold down the Option Key at boot, and select the right partition to boot from, I then started verifying all my drives and paritions with Disk Utility, and was finding and repairing various issues (everything seemed to repair fine) and also the Mac HD partition seemed to have Permissions issues, which seemed to repair fine.
But, in the process of doing this, am noticing an issue, or at least a difference between the Mac HD and and the External Mac-formatted Verify logs. The External drive ALWAYS tells me the drive is good, while the Mac HD has done that only once, and usually seems just to stop with "Checking Volume Information" as the last entry. Not sure this is an issue, or not, but was looking for ANY cause for the continual Windows issue.
Disk Utility Log Dumps are below, first the internal Mac HD (two partitions, Mac and Boot Camp, checking only the Mac partition), second the External G-Drive, formatted Mac RAID HD. Both times, I am selecting the drive partition below the actual physical HW.
The Boot Camp partition checks good.
Thanks.
2014-06-15 01:54:28 -0600:
2014-06-15 02:16:43 -0600: Verifying volume “Macintosh HD”
2014-06-15 02:16:43 -0600: Starting verification tool:
2014-06-15 02:16:43 -0600: Checking file system
2014-06-15 02:16:44 -0600: Performing live verification.
2014-06-15 02:16:44 -0600: Checking Journaled HFS Plus volume.
2014-06-15 02:16:44 -0600: Checking extents overflow file.
2014-06-15 02:16:50 -0600: Checking multi-linked files.
2014-06-15 02:16:51 -0600: Checking catalog hierarchy.
2014-06-15 02:16:59 -0600: Checking extended attributes file.
2014-06-15 02:17:01 -0600: Checking volume information.
2014-06-15 02:17:01 -0600: Repair tool completed:
2014-06-15 02:17:01 -0600:
2014-06-15 02:18:21 -0600: Verifying volume “G-RAID with Thunderbolt”
2014-06-15 02:18:21 -0600: Starting verification tool:
2014-06-15 02:18:21 -0600: Checking file system
2014-06-15 02:18:21 -0600: Checking Journaled HFS Plus volume.
2014-06-15 02:18:21 -0600: Checking extents overflow file.
2014-06-15 02:18:21 -0600: Checking catalog file.
2014-06-15 02:18:23 -0600: Checking multi-linked files.
2014-06-15 02:18:23 -0600: Checking catalog hierarchy.
2014-06-15 02:18:23 -0600: Checking extended attributes file.
2014-06-15 02:18:25 -0600: Checking volume bitmap.
2014-06-15 02:18:25 -0600: Checking volume information.
2014-06-15 02:18:25 -0600: The volume External_1 appears to be OK.
2014-06-15 02:18:26 -0600: Repair tool completed:
2014-06-15 02:18:26 -0600:
2014-06-15 02:28:20 -0600: Verifying volume “BOOTCAMP”
2014-06-15 02:28:20 -0600: Starting verification tool:
2014-06-15 02:28:20 -0600: Checking file system
2014-06-15 02:28:20 -0600: Checking Volume /dev/disk1s4...
2014-06-15 02:28:20 -0600: Type of the filesystem is NTFS.
2014-06-15 02:28:20 -0600: Volume label is: BOOTCAMP.
2014-06-15 02:28:21 -0600: Verifying 9820 file(s) with EAs...
2014-06-15 02:28:28 -0600: $UpCase file is formatted for use in Windows 7/8/8.1.
2014-06-15 02:28:28 -0600:      51.90 GB in 87120 files.
2014-06-15 02:28:28 -0600:      65860 KB in 22860 directories.
2014-06-15 02:28:28 -0600:          0 KB in bad blocks in 0 fragments.
2014-06-15 02:28:28 -0600:     231124 KB in use by the system.
2014-06-15 02:28:28 -0600:         64 MB occupied by the log/journal file.
2014-06-15 02:28:28 -0600:          4 KB in each allocation unit.
2014-06-15 02:28:28 -0600:   31175679 total allocation units on volume (118.93 GB).
2014-06-15 02:28:28 -0600:   17488312 allocation units available on volume (66.71 GB).
2014-06-15 02:28:28 -0600: No repairs were necessary for volume /dev/disk1s4.
2014-06-15 02:28:28 -0600: Repair tool completed:
2014-06-15 02:28:28 -0600:

Do a backup. Boot to the Recovery Volume (command - R on a restart or hold down the option key during a restart and select Recovery Volume). Run Disk Utility Verify/Repair and Repair Permissions until you get no errors. See if the internal drive checks good.
OS X Recovery
OS X Recovery (2)

Can Lion disk utility dynamically partition a drive?

Can Lion disk utility dynamically partition a drive? I see many posts that Leopard Disk utility can but nothing about Lion.

Yes. I'll post a link to instructions. Be sure to create a full reliable backup before you begin (don't just do the backup, test the backup to be sure it's good), and the only application that should be running until the process is complete is Disk Utility.
http://osxdaily.com/2009/11/20/resize-partitions-in-mac-os-x-with-disk-utility/
Some people have problems resizing partitions because of the hidden Recovery HD partition. It sometimes gets in the way because Disk Utility can move it "up" but cannot move it "down".

I want to partition an external device for OSX and Windows. Opened Disk utility but Partition is not an option

I want to partition an external drive for OSX and PC. Went to Disk Utility but Partition is not an available option.

Why not? does the partition tab not exist?

Disk Utility - Verify Disk Permissions / Repair

I run Disk Utility > Verify Disk Permissions with this rsult:
Verify permissions for “Macintosh HD”
Permissions differ on "usr/share/derby", should be drwxr-xr-x , they are lrwxr-xr-x .
The following repair was successful.
A few minutes later I run Verify Disk Permissions again with the SAME result:
Verify permissions for “Macintosh HD”
Permissions differ on "usr/share/derby", should be drwxr-xr-x , they are lrwxr-xr-x .
What does it mean and how can I stop this error?
Thanks!

There is nothing in that message that requires repairing. That is why it keeps showing up.
The permission database has to be updated every time the system is updated. If they miss a change that they have made in the system, it will get flagged as you see, but doesn't mean anything is wrong.
That KnowledgeBase article also must be updated to reflect the things they missed.
All that message is saying is that the directory derby is now replaced with a link to another directory (the l vs the d). However, mine doesn't have a link. Did you install anything that might have updated derby?
If you open Terminal and enter this code, can you post the line that has derby on it?ls -al /usr/share/
I'm repairing permissions now to see what pops up for me, but that will take a little while.
Edit: I looked into the Derby directory and Derby is a Relational Database Management System used by Apache. So, did you install something that modified Apache, PHP, mySQL or something like that? It might have altered the link.
Message was edited by: Barney-15E

When I run disk utility, verify permissions I get "WARNING SUID file system/Library/Coreservices/Remotemanagement/ARDAgent.app/Contents/MacOS/ARDAge nt has been modified

When I run disk utility, verify permissions I get "WARNING SUID file system/Library/Coreservices/Remotemanagement/ARDAgent.app/Contents/MacOS/ARDAge nt has been modified

Please read Disk Utility's Repair Disk Permissions messages that you can safely ignore.
Roger

Disk utility verify comes back with a errors.

I am running Mac OS X 10.5.8.
When I run the disk utility verify it comes back with a message saying that it cannot repair the errors found on the drive. I also get msgs that the file counts and directory counts are not what they are supposed to be.
What do you recommend I do? Are these errors serious or should I ignore them. I only noticed these errors yesterday after my computer would not boot. I had to actually take out the power cord from the back of the computer and hold the power buttom down for 20 secs and then reattach the power cord. Only then did it boot again.
I am thinking about doing a complete reinstall from scratch however, there may be a chance that some other disk utility out there can fix my problems....any ideas?
Thanks in advance for your help.

Since your system is having trouble booting, you should probably fix those errors.
When Disk Utility can't repair a problem, you have some choices. Many people buy Disk Warrior or TechTool Pro, with Disk Warrior the preferred program, to fix those sort of errors, assuming they aren't caused by failing hardware. Those sound like 'soft' errors that Disk Warrior can repair (see their web site).
If you want to check your hard drive hardware, you can run the Apple hardware test (run the extended test), and SMART Utility is another program that will give you insights into the health of the hard drive.
If you have a good backup, another option is to boot to an OS X DVD (or a bootable backup), use Disk Utility to erase the hard drive and write zero's to it, then restore your backup. If you go this route, make sure you have a good backup because you'll be erasing, permanently, everything on your hard drive.

Disk Utility: "Modifying Partition Map"

Good Afternoon all. Im not sure whether this is a problem or not but i have run disk utility to partition my hard drive, and as of now it has been running for over 24 hours.
700 Gb Hdd Partitioned at 487 ( Mac OSx ) and 210 ( Windows NTFS )
The 210 was partitioned by Bootcamp and xp is installed and runs fine
I am attempting to partition the 210 by 55 to allow for the inclusion of Vista
I ran Disk utility yesterday around 9 or 10 and since then it has been saying modifying partition map.
i dont believe it's frozen or has stalled because it responds and i have burned a disk using disk utility. however if i attempt to close it it warns me of damage.
so my issue is whether or not i should just wait it out or if there is something safe i can do. Additionally if installing vista there is a bad idea i would like to be advised.
Thanks In Advance

It's most likely stuck and not going to finish. I experienced this once while creating a new partition for testing purposes. Force quiting will loose any unsaved changes including a partition that's being modified but it looks like your only option at this point. It should not affect your current Mac partition however I'm unsure if it will affect your XP partition. Boot camp works well but in general I would say it's not a good idea to try and re-size or split existing partitions that have data. To do what you want to do you could use Boot camp to create another partition but it would only take the space from your Mac volume. You would probably have to backup or make an image of your XP system then start over using Boot Camp to create the 2 partitions of the size you want.
FYI: You would probably have a better chance getting an answer for this question over in the Boot Camp forum.
George

I reinstalled osx 10.8.2 from recovery disk, now verify disk says my hard drive is there but wont boot into it regardless which partition i select to boot into , everytime it boots me into the recovery, i need help!

Mb pro running like garbage with 10.8.2 tried a reinstall of osx from recovery utility now the utility says my hard drive is ok but wont boot into it keeps booting me back into recovery tried restart option to select disk tried using the select startup disk from recovery, gives a message asking if i really want to boot to it and in that message is the only rime it shows a question mark on the drive dont know what to do cant find similar issue

Your rushing and not making much sense.
Your machine was running like garbage, so you tried to reinstall 10.8---did you do this or not?
Disk Utility says your drive is ok, that's good.
But when you boot it keeps booting Recovery HD, so perhaps the firmware has made a mistake, it can forget.
You held the option key down to boot into Startup Manager, why didn't you select OS X for the boot volume?
When you get into OS X you change the Startup Disk in System Preferences, that should take care of the Flashing Question mark issue.
attemtping to ireinstall osx from recovery partition bar is full on install screen, but im now at -6hours remaining
So now your reinstalling OS X like you set out to do before, it does take some time as it has to download from Apple's servers.
If your Internet connection is slow and/or Wifi is slow then it will take awhile.
So you should have the Flashing Question Mark and Reinstall Only OS X covered.
You should be able to boot the machine, but your performance issues may be something else and still remain.
Why is my computer slow?
Step by Step to fix your Mac
https://discussions.apple.com/community/notebooks/macbook_pro?view=documents#/?p er_page=50

Disk Utility Verify/Repair options

When I Verify my HD in Disk Utility I get this error.
Why does it say this? Should I Repair the disk? Will I lose data? Any help thanks!

You will need to repair the HD per the instructions, this is critcal. Prior to doing this backup your computer, that should be your #1 priority!! To repair the HD, restart the computer, when you hear the startup tone hold down the Option Key and select the Recovery Partition. Open Disk Utility, select your internal HD and run Repair Disk. If the disk has error run Repair Disk 2-3 times, if errors continue your have a damaged HD that needs to be replaced.

Disk Utility, Verify Disk & Repair Disk unavailable

Hi there!
I want to check my Hard Disk with Disk Utility, but none of the two buttons (Verify Disk & Repair Disk) are available, I started up from my Mac OS X installation disc, and once, it told me that the disk had errors and needed to backup my files, so I went back and backed up with Time Machine, then out of curiosity went again and I started up from my Mac OS X installation disc, and this time it told me that the disk was fine and there wasn't any errors, but when I open Disk Utility with my Mac, none of the buttons are available, is this normal?
What should I do?
Context: Before all this, I installed a program called Tuxera to create a NTFS partition but my Mac started to act weird, so I deactivate and uninstalled this program, that's when I went to verify the disk.
Any Help would be gratefully appreciated

I hope I'm wrong but it sounds very much like Tuxera did something to your startup disk. I would also be somewhat concerned about the integrity of any Time Machine Backups you made after you ran Tuxera.
The safest thing to do would be to start up from your Snow Leopard disk and see if you can *restore your system and data from your Time Machine backups to an +external HD+* formatted using Mac OS Extended (Journaled) and GUID Partitioning. Formatting will erase all the data on that disk. *If you try to restore to the internal and it doesn't work you will probably lose most of your data.*
Startup your Mac using the external and check very carefully to see that you have all your data and that everything works as it should. If it does you can safely reformat your internal drive from Disk Utility on the Leopard disk using Mac OS Extended (Journaled) and GUID Partitioning. After that you can clone the external drive to your Mac's internal drive or install from the Time Machine backups.
If the Time Machine backup doesn't work you will need to run a disk data recovery utility to see if you can salvage your data from your internal drive.
I don't use PC's so someone may be along with much better advice. However, unless and until someone more knowledgeable about PC file formats comes along to help *don't reformat your internal drive until you know your Time Machine backups are OK.*

Data loss Lacie 500GB external drive_ disk utility changed partition!

Details of problem. I have a 500GB Lacie mini hub HDD which is used with an iMac angle poise. Recently it has been playing up- unable to access folders/files etc. and since I know the PSU fails on these items (capacitors fail -5V and 12V go haywire- already fixed another one - I have a 320GB with a mac mini setup) I removed unit from the imac and connected in place of the 320GB lacie on the mac mini, using the known good PSU. The iMac is running latest 10.4 and mac mini is running latest snow leopard 10.6.1
The Lacie spun up and mounted OK and I was able to access all files folders with no issue, so since I was keen to make sure it was 'fixed' I ran disk utility. It ran and said it verified and then I realised I hadn't run repair so re-did this. Big mistake!
It did the same run and said no problems found, but it then said something like updating partition! Horrified I waited and it seemed to finish or had finished straight away. Not sure. I looked at folders and yes main 2 items in place, but nothing showing below this. ****. It got worse. I ejected and tried to reconnect and low and behold it says drive needs formatting now. Disk utility even shows this 500GB as having 2.2TB of space, which I see in other posts is another issue.
I have important data backed up elsewhere, but there are a large number of files I do not have copies of and suspect there is a way to recover these. I have since seen all the 'data loss' guest account issues and wonder if this is yet another bug in snow leopard.
Have tried running Techtool Pro 5.0.6 to see if it can see the data but its not seeing anything. Will try Diskwarrior and others, but may well shelve to see if apple gets an os update released for data loss issues.
Any thoughts on how to recover? Anyone with a similar issue? I am pretty certain this is not a failed hard drive as it sounds 100% normal. Thanks for any help or guidance.

Thanks for all the comments recieved. V.K. made me re-evaluate what I had proved or not. I was fairly certain (not 100%) that the drive mech was OK, because the psu had failed, but should have proved drive mech was actually OK. So I removed the mech (as USB abd firewire can't do SMART etc.) and hooked up to an old G4 Powermac. I then found that the SMART verified, but had forgotten the 128GB limitation on older macs. So removed and got a PC to hook it up and run latest IBM_Hitachi drive fitness and other diags. (its a Deskstar HD and I have had almost zero issue with these drives over the years.) It checks out fine, so I was correct in my initial thoughts, only the PSU was faulty.
So back to my initial suspicions that Snow Leopard or disk utility has screwed things up, maybe a bug, maybe not. And I did run verify first and it said it was OK, only when I re-ran the repair did it then do a "partition update" (or whatever it said - should have done a screen capture - searched apple but can't find listing of all mesgs avail. must be in developers site I expect). So I am back at looking at how to recover, if at all possible, but as Alsoft have said this is not something Diskwarrior can do directly. Files must still be there just partiton map is now in a ... needs to be initialised mode. Not that I will do that.
So I guess summary is possible bug/funny in 10.6 and/or disk utility.
sounds like I will be contacting Alsoft now
may read up on partition map damage first, so I get a better picture of whats involved.
Cheers and thanks for all the help/ideas.
BTW - been using macs_pcs for decades now and helping friends & family fix things as and when. This is first time needed to post on forum as always found answers to questions I had previously. Must remember the old adage of not jumping onto new technology until it has bedded down I bet if I had hooked up to the old G4 Powermac I wouldn't be in this position. Thanks again.

Disk utility: verify selection- which to choose

When you open disk utility, you see the size/type of HD you have, then underneath usually "Macintosh HD." Assuming this is all you have and you haven't split your disk up, does it matter which you choose in order to repair and verify? Does each location produce different results?

Hi, powerbook1701.
Given the situation you described:
1. One hard drive in or attached the computer.
2. The hard drive has with only one partition/volume, i.e. you see something similar to the following in the left column of Disk Utility:<pre>233.8 GB Maxtor 7L250S0
Macintosh HD</pre>Then you can select either the device or the Macintosh HD volume.
The first line — 233.8 GB Maxtor 7L250S0 — is the device, i.e. the hard drive. The second line, Macintosh HD listed below and indented from the first line, is a volume on that device.
Note that to run Repair Disk on your normal startup disk, i.e. Macintosh HD, you need to startup from your Tiger Install Disk (or a bootable duplicate of Macintosh HD) and run Disk Utility from there.
Verify or Repair Permissions only apply to volumes on which Mac OS X is installed. Neither is an available choice for data-only volumes or devices.
When in doubt, select the volume you want to verify or repair.
Note that if you have a drive with multiple partitions, e.g.<pre>233.8 GB Maxtor 7L250S0
Data Volume 1
Data Volume 2
Data Volume 3</pre>select the device, and then select either Repair Disk or Verify Disk, all volumes on that device will be repaired or verified in sequence. Again, none of the volumes on that device should be your current startup disk, i.e. the disk from which you started up your Mac.
You can even select multiple devices by holding the Command Key while making selections. In such a case all volumes on the selected devices will be verified or repaired.
For example, if I started up from the Tiger Install DVD, launched Disk Utility, selected the two devices shown here:<pre>233.8 GB Maxtor 7L250S0
Macintosh HD
233.8 GB Maxtor 7L250S0
Data Volume 1
Data Volume 2
Data Volume 3</pre>and then clicked Repair Disk, all volumes on the two drives would be repaired.
Good luck!
Dr. Smoke
Author: Troubleshooting Mac® OS X

Using Disk Utility to partition drive

After downloading a system update yesterday my mac mini hard drive is no longer bootable. The recovery HD is unbootable, too.
When I boot up using the install CD I can run Disk Utility and see that there are no problems reported with the hard drive, but I cannot repair permissions (No valid packages).
If I restore the operating system from the CD my only option is to erase the hard drive.
But what if ...
I create a new partition using Disk Utility?
There's loads of free space on the drive, but if I attempt to create a new partition will I wipe out existing data?
If I succeed in creating a new partition would I be able to restore the operating system there without erasing the hard drive?
Would it be possible then in some way to restore my user account data?
I'm just trying to avoid the hassle of re-installing my applications and recovering my data files from backup. It seems like the data is still all there on the hard drive except that something went wrong during the system update that renders the disk unusable.
Any help appreciated.

Yep, that is too old...
Mac mini
Mac OS X Install Disk 1
Mac OS X version 10.4.7
AHT version 3A102
Disc version 1.1
2Z691-5887-A
Mac OS X Install Disk 2
Disc version 1.0
ZZ691-5860-A

BootCamp nor' Disk Utility will Partition my Drive.

Alright, So Im back again, And this time I have a totally different topic.
Today I tried to Partition my drive to add another OS, to be specific, Windows 7 (Don't hate me! :P)
The first step I took was using BootCamp SINCE, It is for windows installation on Mac OS X.
WELL, I tried partition and BootCamp wouldn't let me, The Boot Camp Assistant will usually get stuck at the "Partitioning Disk..." stage, Or sometime it will say. "Partitioning Disk..." for about 5 minutes then a warning message will pop up saying, "Verification failed. This disk could not be partitioned. Use disk utility to repair this disk."
I hit okay, then go to Disk Utility, And try to partition my disk from there, I will select how big of a partition I want leaving about 6 gigs on my main partition. I hit "Apply" and then it starts to partition, but the only thing it does is, "Modifying the partition map" for about 5 minutes and then I get a warning message saying, "Partition failed. Partition failed with the error: Filesystem verify or repair failed." Im not really sure what this means, but after this, I try to Verify and Repair my disk. It does the "Verifying" stage for about 8 minutes and then tells me "First Aid Failed. Disk Utility stopped verifying "Macintosh HD" because the following error was encountered: Filesystem verify or repair failed." In the "Details" box, this is what it says,
"Verifying volume “Macintosh HD”
Performing live verification.
Checking Journaled HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Checking multi-linked files.
Checking Catalog hierarchy.
Checking Extended Attributes file.
Checking volume bitmap.
Checking volume information.
Invalid volume file count
(It should be 410899 instead of 410900)
Invalid volume directory count
(It should be 117223 instead of 117222)
The volume Macintosh HD needs to be repaired.
Error: Filesystem verify or repair failed."
Can someone please help me out here, All I want to do is make one stinkin partition for Windows 7! Whats going on here?!

If you are going to repair a startup volume then you must do this:
Repairing the Hard Drive and Permissions
Boot from your OS X 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 Installer menu (Utilities menu for Tiger and Leopard.) 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. Now restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (4.0 for Tiger, and 4.1 for Leopard) and/or TechTool Pro (4.6.1 for Leopard) 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.
Your error suggests some major defect with the hard drive. If it cannot be repaired you will have to re-partition the drive. This will erase everything on the drive, so be sure to backup first.
Also, you cannot install Windows on a partition your create with Disk Utility. You must use Boot Camp Assistant on a drive with a single partition/volume using GUID partition map and formatted Mac OS Extended, Journaled.

Recovery/Disk Utility/Verifying Partition

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