Disk Utility debug mode

I am trying to work out what possible use "thousand minute countdown" and "10,000 line first aid" can have. I'd also like to know what these "features" actually are. Thus far, no internet search has been fruitful.

Try holding down the option/alt key during a restart and see if you can select the Recovery partition there. Have you tried booting into the Safe Mode?
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  • I am in mavericks disk utility recovery mode as my mac book will not boot up & stays only on the grey apple screen. When I verify the disk I get open error5 :input /output error on Syst stuck on 1 minute pouring out over 50 error messages & still counting

    I am in Mavericks disk utility recovery mode as my mac book pro will not boot up & stays on the Apple grey screen . When I verify disk permissions I get
    Open error 5:"input/ output error" on syst with over 50 of this messages & still counting . Disk Utility says 1 minute
    But this has been going on for over 10 mins .
    I can not verify disk or repair disk .
    I have tried to reinstall mavericks operating system but it says my hard drive is locked which is very strange .
    Does anyone know what is going on here ?
    My system looks like it has been totally corrupted . Thanks Andrew

    Could be. The "lock" isn't actually looking for a password.
    WARNING: This will completely erase the ENTIRE hard drive.
    What you would need to do is boot to recovery > disk utility > select the MAIN drive on the left side > partition > change partition layout from CURRENT to 1 PARTITION > ensure on the right side it says Format : Mac OSX Extended (Journaled) then push APPLY.
    Then if it will allow us, close the windows until you see the 4 options popup again and select "Reinstall Mac OS X" select the Mac HD and you should be good to go!

  • My White Macbook is stuck at the loading screen, and disk utility, safe mode doesn't work either. What should I do?

    I went on vacation a few days ago and in El Salvador, they have this mobile broadband sticks. Well, I was using one until it gave me a network error. After that, it shut down my computer entirely. The first time it happened, I didn't think much of it. I took the battery out and put it back in for it could work. It happened another two times, and after the third time, my MacBook stays stuck at the loading screen, and it will take 5-10 minutes on that screen, before it shuts down, or it wouldn't turn on at all. I've tried booting into safe mode, but it appears to not boot into it. I've tried resetting the Pram, and using disk utility, but that still won't work. I don't know what else to do to make it boot into  OS X  Lion.
    I'm an AP student, and the majority of my work is in that computer, and it is very important! What can I do? Not only that, but I enter school in a few weeks and I need the AP work by the time I enter.
    What can I do? Can someone help?
    Thanks

    Reinstalling Lion Without the Installer
    Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alterhatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
    Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
    When the recovery menu appears select Disk Utility. 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 main menu.
    Reinstall Lion: Select Reinstall Lion and click on the Continue button.
    Note: You can also re-download the Lion installer by opening the App Store application. Hold down the OPTION key and click on the Purchases icon in the toolbar. You should now see an active Install button to the right of your Lion purchase entry. There are situations in which this will not work. For example, if you are already booted into the Lion you originally purchased with your Apple ID or if an instance of the Lion installer is located anywhere on your computer.

  • Can't Enable Disk Utility Debug Menu

    Hi, all,
    This is the first time I've tried to enable the debug menu in DU since installing Mavericks.
    Unfortunately, it's not working.  I've tried:
    1) defaults write com.apple.DiskUtility DUDebugMenuEnabled 1
    2) Opening com.apple.DiskUtility.plist in PL editor and, because there was no entry for it already there, I added DUDebugMenuEnabled [bool] [checked]
    I quit DU and restarted each time.
    Any ideas?
    Thanks.

    Actually I'm trying this again on another Mavericks laptop and it's not working.
    I have the following, but the debug menu will not come up.  I tried deleting the preference plist file.
    defaults read com.apple.diskutility
        DUDebugMenuEnabled = 1;
        DUSavedDiskImageList =     (
        DUShowDetailsInFirstAid = 1;
        "NSWindow Frame /Users/kathryn/Library/Logs/DiskUtility.log" = "788 247 529 424 0 0 1440 878 ";
        "NSWindow Frame Disk Utility" = "255 174 853 648 0 0 1440 878 ";
        "NSWindow Frame Progress Panel" = "537 639 366 27 0 0 1440 878 ";
        "NSWindow Frame Progress Panel Frame" = "537 639 383 24 0 0 1440 878 ";

  • How to get rid of hidden partitions display in Disk Utility?

    Running Snow Leopard I used the Terminal (defaults write com.apple.DiskUtility DUDebugMenuEnabled 1) to enable the Disk Utility Debug Menu. I then turned on the Show Every Partition so I could see the hidden partitions (but grayed out) in the disk/volume list. I then turned off Show Every Partition and they became hidden again.  I disabled the Debug Menu using the Terminal (defaults write com.apple.DiskUtility DUDebugMenuEnabled 0). The Debug menu went away, but the hidden partitions still show up again after quitting and restarting DU. Rebooting computer doesn't help either.
    It appears that display of all partitions is permanent. Does anyone have ideas on what to do to get back to the default display?

    I stumbled on the answer. When I just quit Disk Utility the hidden partitions come back on restarting DU. If I select Close from the File menu, the display of the hidden partitions goes away and doesn't come back after quitting and restarting DU.

  • Can't log in with valid password, can't boot from disk, can't access disk utility, in single user mode can't reset password as appears locked in caps mode with '?' for forward slash, can anyone help?

    Can't log in with valid password, can't boot from disk, can't access disk utility, in single user mode can't reset password as appears locked in caps mode with '?' for forward slash, can anyone help?

    Which keyboard layout you were using? German, French ... I suppose your layout is reset to the default: US and you are unable to find the "?" or "/" ...
    Please have a look into the keyboard viewer, to see how the layout of your keyboard is actually.
    marek

  • Why can't Disk Utility wipe my old iMac in Target Disk Mode?

    I want to donate my old iMac G3 with all my personal data removed.
    As all my old start up disks are long gone I went online and followed advice to wipe it remotely. I connected the G3 via FireWire to my 15" MacBook Pro (late 2008, running OSX Lion 10.7.5) and restarted the G3 in Target Disk Mode. I opened Disk Utility, selected the drive (not the iMac partition), selected Erase, renamed the drive and chosen the 7 pass option. And waited...
    After leaving it overnight, I awoke to find it was still preparing. I then Skipped that stage (it gave me the option) and left it for 24 hours. It was still skipping, so I had to Force Quit Disk Utility. The G3 is perfectly fine, and Disk Utility works as I just erased a memory stick as a test.
    What's going on?

    You need to do the following:
    Drive Partition and Format
    1. Open Disk Utility in your Utilities folder.
    2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
    3. Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Partition button and wait until the process has completed.
    4. Select the volume you just created (this is the sub-entry under the drive entry) from the left side list. Click on the Erase tab in the DU main window.
    5. Set the format type to Mac OS Extended (Journaled.) Click on the Security button, check the button for Zero Data and click on OK to return to the Erase window.
    6. Click on the Erase button. The format process can take up to several hours depending upon the drive size.
    Only use a single-pass to zero the data. Any more is overkill and will take many hours to complete.

  • How long should I let Safe Mode startup run? I keep getting the "disk0s2 i/o error" message and I'm just not sure when to give up and try a different method. I already ran disk utility in Recovery Mode and it said there were no repairs needed.

    How long should I let Safe Mode startup run? I keep getting the "disk0s2 i/o error" message and I'm just not sure when to give up and try a different method. I already ran disk utility in Recovery Mode and it said there were no repairs needed but it still kept getting stuck on the apple loading screen.

    You have limited opportunity to attempt to create a backup of your created files.
    That is what the SafeBoot or safemode appears to allow you -- at the moment.
    Since the hard disk drive exhibits signs of failure or other major issues, plan
    on a replacement in the near future. You may be able to get the computer to
    start up in a regular full OS X (not safe mode) but consider its hours are limited.
    An externally enclosed hard disk drive (with own power supply, not relying on
    Mac ports to run it) is a good basic means of which to use a disk utility to make
    a copy or a Clone of the current OS X. This may help retrieve an archive that
    could be used along with a Time Machine backup, to restore your Mac once you
    get a new hard drive installed inside.
    Good luck & happy computing!

  • Disk Utility not working under cmd R mode

    I upgraded my OS to 10.8.2. After doing so, when I do my normal system backup with Disk Utility, the system goes into sleep mode and the backup stops. I've done this many times in the past so I am not new to this.  I've read a few articles/posts with people having the same issue.  Why is apple not fixing this important bug?  I can't backup my system.  I have "verified disk" and it has no errors so that's not the issue.  The backup image starts to backup to my usb external drive then the screen dims and the system goes to sleep after about 5% and the flash drive stops flashing so it's not longer backing up.  When I press escape or any key, it resumes the backup but this takes hours.  I can't sit in front of the computer to keep moving my mouse.  HELP!!!
    I use Disk Utility 13.  I reboot and press Command R and then use the Disk Utility from there. I don't want to use Time Machine.  It slows my system too much.

    You need automatic, frequent backups that don't require you to shut down the system, and that preserve some history. Using Disk Utility in Recovery is good for backing up a system that won't boot, or when preparing to erase and restore a volume, but what happens if you delete a file and then decide a week or a month later that you needed it?

  • Disk Utility backup not working under Cmd R mode

    I upgraded my OS to 10.8.2. After doing so, when I do my normal system backup with Disk Utility, the system goes into sleep mode and the backup stops. I've done this many times in the past so I am not new to this.  I've read a few articles/posts with people having the same issue.  Why is apple not fixing this important bug?  I can't backup my system.  I have "verified disk" and it has no errors so that's not the issue.  The backup image starts to backup to my usb external drive then the screen dims and the system goes to sleep after about 5% and the flash drive stops flashing so it's not longer backing up.  When I press escape or any key, it resumes the backup but this takes hours.  I can't sit in front of the computer to keep moving my mouse.  HELP!!!
    I use Disk Utility 13.  I reboot and press Command R and then use the Disk Utility from there.

    You need automatic, frequent backups that don't require you to shut down the system, and that preserve some history. Using Disk Utility in Recovery is good for backing up a system that won't boot, or when preparing to erase and restore a volume, but what happens if you delete a file and then decide a week or a month later that you needed it?

  • My MacBook Pro 13 inch makes a clicking noise from the hard drive and can not start up in safe mode and normal. I then ran disk utility in recovery mode and disk utility shows no problems with the hard drive. What is the problem?

    Please help me, I have a mid 2010 Mac book pro with a toshiba mk3266gsxf harddrive. It started making a clicking noise and then my computer crashed. I proceeded to boot in safe mode, but it doesn't work. When I ran disk utility in recovery mode, it showed no problem with my disk. Does any one know what the problem is?

    Sounds like a mechanical problem with the drive and it ruined the sectors where the Macintosh HD partition (and OS X, and files and programs) reside, but not your Recovery HD partition.
    If you held command option r while booting, that's Internet Recovery and it's loaded via the Internet, not via the Recovery HD partition on the boot drive, so that could mean the drive is dead mechanically or there is another issue.
    In either case the drive will likely have to be replaced, it's a matter of what occured to where and the drive state if you can recover data or not. If you made recent backups then your fine.
    My computer is not working, is my personal data lost?
    Most commonly used backup methods

  • MacBook won't boot after trying to repair with Disk Utility. Cannot boot in Safe Mode. Just powers down after about 5 minutes. Apple Hardware Test says error 4SNS/1/40000001:IG0C-0.265 But I cannot find anything on the net about it. MacBook 4,1 Intel.

    Hello Everyone,
    I am in dire need of assistance I am hoping someone could provide. I have a MacBook 4,1 with Intel Core 2 Duo processor 4GB Ram. It is taking over 10 minutes to boot up past the gray apple screen when I turn it on. First I cleared the PRam (?) then I checked the disk using Disk Utility Verify, and it said the disk needed repairs. So I ran the disk repair and it said it was unable to fix the errors on the HD.
    I did a little research and tried booting into the Single User mode, then running /sbin/fsck -fy. It said that it found errors but could not fix them. I ran it two more times as suggested and got the same result each time. I then tried rebooting and now instead of taking 10 minutes to boot up, it takes about 5 minutes on the gray apple screen and then just turns off. I started in Verbose mode to try to troubleshoot the error and it appears the last thing to come across the screen before power down is a message "Apple Yukon 2: RxRingSize <= 1024....etc".
    I decided next I would run the Apple Hardware Tester. The test came back with an error code "4SNS/1/40000001:IG0C-0.265". I am very good at searching the web but I could not find any errors that had the IG0C or IGOC or any combination at the end, but plenty of 4SNS/1/40000000(1) errors with different endings. From what I can tell people are saying anything with 4SNS/1/4000000 is a logic board failure, but this computer was literally just booting this morning until I did the /sbin/fsck -fy.
    Any suggestions are welcome and appreciated.
    Thank you for your time.

    You've a couple of issues .... when Disk Utility tells you it can't repair a drive, if the error is a soft error, like an invalid tree or node, Disk Warrior (or TechTool Pro) can handle it. However, if Disk Warrior (or TechTool Pro) can't handle it, you can erase and write zero's to the hard drive and restore to it, or you can buy a new hard drive. Sometimes running SMART Utility can provide additional insight into the health of the hard drive. 
    THe 4SNS error is a sensor error.  You could install iStat Pro to see if something is indeed getting too hot or remaining room temp or less.  You may need to take it into an Apple shop so they can use their thermal diagnostics to test and isolate it further.

  • TS2570 Hi, MacBook Pro & Snow Leopard- startup probs. I have tried repairing with the disk utility, resetting PRAM, booting in safe mode, and finally trying to get to archive&install the o/s, but it cannot find the destination volume. IsAn erase the only

    (10.6.8 Intel core duo 2009)
    Hi,
    I have a grey screen and grey rotating wheel startup probs. I have tried repairing with the disk utility, resetting PRAM, booting in safe mode (which gave a subset of the errors that 'disk repair' did- namely- 'invalid sibling link,invalid record count, invalid node structure, invalid key length)  and finally trying to get to archive&install the o/s, but it cannot find the destination volume. Is an erase the only option? PS I have backed up most files individually, but my daughter did not back up any from her user account. Any help would be appreciated. J

    Gray, Blue or White screen at boot, w/spinner/progress bar
    Why is my computer slow?
    ..Step by Step to fix your Mac
    https://discussions.apple.com/community/notebooks/macbook_pro?view=documents

  • Disk Utility in Recovery HD does not see same problems as Normal Mode

    [Please note my computer specs are below]
    I recently upgraded to Yosemite and installed Avid Media Composer 8.2. Right after the installed the software I ran Disk Utility's Verify Disk and received the following messages after 60 seconds or so:
    Incorrect number of file hard links
    Volume bitmap needs minor repair for orphaned blocks
    Invalid volume free block count
    The volume Macintosh HD was found corrupt and needs to be repaired.
    Error: This disk needs to be repaired using the Recovery HD. Restart your computer, holding down the Command key and the R key until you see the Apple logo. When the OS X Utilities window appears, choose Disk Utility.
    I restarted using Recovery HD and ran Verify Disk again. It finished scanning in about one second and said everything was okay.
    After restarting I ran Disk Utility a third time and received the same error messages as above.
    I've just finished calling Apple support and they couldn't help me. The gentleman said it must be an anomaly because I'm using a flash disk. After several minutes it was clear he wasn't going to help me - so here I am. Computer specs below.
    MacBook Pro (Retina, 13-inch, Late 2013)
    2.8 GHz Intel Core i7
    Intel Iris 1536 MB

    Do this:
    1. a. Resetting your Mac's PRAM and NVRAM
        b. Intel-based Macs: Resetting the System Management Controller (SMC)
    2. Restart the computer in Safe Mode, then restart again, normally.
    3. Reinstall Yosemite without erasing the drive:
    Boot to the Recovery HD: Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
    Repair the Hard Drive and Permissions: Upon startup select Disk Utility from the main menu. Repair the Hard Drive and Permissions as follows.
    When the recovery menu appears select Disk Utility. 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 main menu.
    Reinstall OS X: Select Reinstall OS X and click on the Continue button.
    Download and install the 10.10.1 update    
    Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.
    Also see:
    Reinstall OS X Without Erasing the Drive
    OS X Yosemite- Reinstall OS X
         Note: You will need an active Internet connection. I suggest using Ethernet
                     if possible because it isthree times faster than wireless.

  • Disk util in recovery mode shows invalid disks - fixing merges the disks to a single LVG

    Seems another day, another interesting issue in Mac OS which has me stumped a little bit.
    Background: My setup is the laster Mac Mini server, I have upgraded the root disk to a 256GB SSD and moved the ordered 1TB magnetic drive to the secondary disk.
    I installed the system with Mac OS Mountain Lion and everything was fine. At this stage I had both disks encrypted with filevault. I then decided to play with some imaging and so destroyed the disks with diskutil cs delete UUID from the terminal in recovery mode (the installer would not work with the disks until I did this), at this stage everything is still ok and the system installed as expected. I then installed a second Mountain Lion instance to the secondary disk, and booted off this, to clone the SSD with disk util. Again, up until this point, everything is as expected.
    Once I had the disk image created, I rebooted to recover mode, and attempted to clear the disks using diskutil and then reinstall Mountain Lion to the SSD, and have the magnetic disk as my users disk, at this point, disk util showed the disks in red. Clicking the disks, diskutil informed me that the disks were bad and I could either fix or ignore. If I ignored, then the installer could not use the disks, if i fixed them, then diskutil merged the disks into a single LVG of 1.25TB, which is obviously not what I wanted, no matter of permutations could fix this. I then had to open the terminal, destroy the LVG and then let the installer run (from memory, i might have had to create a default partition on the SSD before the installer could use the disk, but not 100% sure anymore (tried too many things!))
    Now, when I open disk util in Mountain Lion, everything is fine, but if I reboot to the recovery partition, then the disks are in their invalid state still.
    I found a macworld article (http://www.macworld.com/article/2015664/how-to-split-up-a-fusion-drive.html) which details pretty much what I'm seeing (see the quirks section), but I haven't got a fusion drive - I can only assume then that diskutil *thinks* I have a fusion drive!
    - has anyone seen this before? is there a fix? can I make the disks valid in recovery-mode diskutil as its quite useful to partition the disks when installing the OS.
    - does anyone know how I got into this state? is it because of two instances of ML?
    - Is this a bug in diskutil? is it worth of a bug report?
    As an aside, when running diskutil list in recovery mode, i see, from memory 13 disks (/dev/disk0 - 13) which seems strange, disks0 and 1 were my internal disk, disk 2 the ML net image, and then the rest were small, a couple of hundred K in most cases.
    thanks!
    SockThief

    hey @keg55
    brilliant! So I was mostly right now doesn't that make you feel good - to be honest, I'm gettingg rather sick of tools that are too smart and do what they think you meant, rather than what you **** well tell them!
    It's was strange the timing of it, as diskutil (gui in recovery mode) only thought the disks were bad after I installed ML on the magnetic disk as well as the SSD.
    So if I want to erase a disk (to ensure an absolute clean slate before reinstalling) is a diskutil eraseDisk diskX sufficient? I don't think writing 0's is really required, so zeroDisk/randomDisk/secureErase aren't really applicable to a simple reinstall. But, then I guess before installing, it will require a partition, correct?
    I was thinking, perhaps I could solve this by making a 1:1 LVG, i.e.: put the SSD in an LVG and the magnetic disk in an LVG?

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