Running disk utility resulted in an error... what should I do next?

My MacBook Pro wasn't booting up today. I was getting the spinning wheel and after a minute or so it would restart, and it just continued to restart like that. Looking through the forums, I found some steps to take including starting in safe mode which didn't work for me. I have now rebooted with the install disk and gone into utilities - disk repair. The results: Invalid sibling link, Volume check failed, Error: The underlying task reported failure on exit, 1 volume could not be repaired because of an error.
The logic board was replaced under warranty within the last year. I will make an appointment at the genius bar... unfortunately the earliest I can go is 10am tomorrow, and I had planned on leaving on a road-trip tonight. I need my laptop on the trip as I'm doing some photography work for a resort. Is there anything else I can do to fix the error, or is my best bet to go to the genius bar? Thanks for your help!

Allan, excellent link. I had not seen that before. Thanks.
worldtrekker, to add to Allan's advice: I read through all the followup posts and recommend you do so before using this method. If you already have a current backup, nothing too much to worry about, except your pressing time-frame. If you do not have a backup, but you have another Mac and a FireWire cable available, I recommend booting into FireWire Target Disk Mode and backing up any important data you have on the internal HD before proceeding.
If you do have a portable bootable backup, that is another option, to boot/run from it tomorrow until you get the time to take care of the internal HD.
One other note: Allan first mentioned DW. That is probably the safest bet, but costs more than a new HD, so depends what your priorities are here. Do note that you can download/use DW (don't have to wait for a disc to be shipped), but DW can take many hours, in some cases days to perform its magic. Personally, I think it is a wise investment for anyone who depends on a Mac for income or to store important data. Good luck.

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Need assistance with my Porsche Design LaCie Time Capsule... It is not operating at all.. I have ran the diagnostic via the Disk Utility and under the error reading it runs the repair and then says it not about to repair what do I do... Thanks

Need assistance with my Porsche Design LaCie Time Capsule... It is not operating at all.. I have ran the diagnostic via the Disk Utility and under the error reading it runs the repair and then says it not about to repair what do I do... Thanks

LaCie doesnt make ANYTHING. It contains a Seagate 3.5" 5400RPM HD.
Check the HD on another computer, if nothing, your SATA bridge is fried, or the HD (very unlikely since its a Seagate inside)
Youd have to crack open the HD, remove the SATA bridge cart thats plugged into the HD and put the HD into an enclosure or a HD dock to get the data
those external HD use a 50 cent SATA bridge famous for failing. The curse of all the good HD externals is the junk 3rd party SATA bridges attached to them that crash and burn.
Sata bridge:

URGENT!!!!- INTEL MAC "INVALID SIBLING DISK" error when run disk utility

I am very upset, I ran my verify disk permissions, everything fine, repair disk permissions, everything fine, do t periodically just to mae sure all my stuff is in order,,,, then I decided to run te VERIFY DISK, because do not do it as much and want to mae sure my macbook pro is running fine, and I get:
Verifying volume “minimal minimal”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Invalid sibling link
The volume minimal minimal needs to be repaired.
Error: The underlying task reported failure on exit
1 HFS volume checked
Volume needs repair
!!!!!!!!!!!!!!! ***?!!!!!!!!!!!!!!!!! there is no way of repairing the disk, and when I search for possible solutons it says I need to run it from the original osx installer disk, and even when it does not necessarily repir this error. besides the fact that the original cd is in atlanta and I am currently in barcelona, some say that I would need to reformat my drive and either way this might not solve the problem. I HAVE WAY TOO MUCH IMPORTANT INFORMATION on my macbook pro to reformat, and i do not have the money to buy an external hardrive, I A VERY UPSET, A BRAND NEW COMPUTER, LESS THAN TWO MONTHS OLD, AND ALREADY I HAVE THESE KIND OF PROBLEMS WITH IT, WHERE IS MY SUPPORT?! please tell me, what do i do? I expect a decent, viable slution to the problem. I need my computer ad the information in it, I work from it and also use it to produce music. why would I have this kind of problem, when I search for answers, everything relates to external hardrives, ..... this is my internal hard drive that I am talking about--- WHAT DO I DO?!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Perhaps, since you are under warranty, they may have a boot disk to attempt to run disk utility and see if the problem can be repaired before resorting to reformatting. Disk error may occur because of a number of issues (installed software, crashes, shutdowns, physical movement of the drive while disks spinning, etc.)
In addition you may want to boot in the single user mode to access the FSCK command as follows: The following is from the Apple support site
Mac OS X: How to Start up in Single-User or Verbose Mode
You may use a key combination when starting up the computer to enter single-user mode or verbose mode, either of which can be used for troubleshooting and in software development. This document applies to Mac OS X and Mac OS X Server versions 10.0 and later.
Steps to Enter Single-User or Verbose Mode
1. Shut down the computer if it is on.
2. Press the power button to start the computer.
3. Immediately press and hold the Command (Apple) key and one of the following:
the "s" key for single-user mode.
the "v" key for verbose mode.
4. To exit single-user mode type: reboot
5. Press Return.
You have successfully entered single-user or verbose mode when you see white text appear on the screen.
Then you may try to repair as follows using the FSCK
fsck is a command-line utility that may be able to verify and repair a disk. If you can successfully start up in Safe Mode or use Disk Utility while started up from a disc, you don't need to use fsck. However, here are some situations in which fsck may be necessary.
Your Mac OS X disc isn't available.
Your optical drive isn't available.
You can't start with a Safe Boot.
Tip: If you use a Mac OS X Extended (Journaled) formatted volume, such as with Mac OS X 10.3 or later, you probably won't need to use fsck. If you do use it for any reason, please be aware that benign error messages can appear.
If you're not sure how your volume is formatted and you can't start up from your Mac OS X volume to find out, type the following command in a command-line interface and then press Return: diskutil info /
If you see "File System: Journaled HFS+" returned, you have a Journaled volume.
To use fsck, you must run it from the command line. Unlike using your mouse to open an application to do something, you'll need to type a text command at the prompt (#) to tell fsck what to do. The Terminal application (/Applications/Utilities) and single-user mode are two examples of command-line interfaces in which you can type such commands. To use fsck:
Start up your computer in single-user mode to reach the command line.
Note: If necessary, perform a forced restart as described in the Emergency Troubleshooting Handbook that came with your computer. On desktop computers, you can do this by pressing the reset/interrupt button (if there is one) or holding down the power button for several seconds. On portable computers, simultaneously press the Command-Control-power keys. If your portable computer doesn't restart with this method, you may need to reset the Power Manager.
At the command-line prompt, type /sbin/fsck -fy
Press Return. fsck will go through five "phases" and then return information about your disk's use and fragmentation. Once it finishes, it'll display this message if no issue is found:
** The volume (nameofvolume) appears to be OK
If fsck found issues and has altered, repaired, or fixed anything, it will display this message:
*** FILE SYSTEM WAS MODIFIED ***
Important: If this message appears, repeat the fsck command you typed in step 2 until fsck tells you that your volume appears to be OK (first-pass repairs may uncover additional issues, so this is a normal thing to do).
When fsck reports that your volume is OK, type reboot at the prompt and then press Return.
Your computer should start up normally and allow you to log in.
About live verification in Mac OS X 10.4.3 or later
In Mac OS X 10.4.3 or later, you can verify your Mac OS X volume while started from it. This is known as live verification, and can be used in three different ways.
Option 1: Verify your disk using Disk Utility while started from the startup disk. To find out how to do this, see this article. Please note that live verification does not involve any disk repair, so if verification finds something that should be repaired, start up from your Mac OS X Install disc and use Disk Utility as described above in "Try Disk Utility."
Option 2 (advanced): Use the command line and the command-line utility, diskutil.
Start up your computer and log in as an administrator.
Open Terminal (/Applications/Utilities).
At the prompt, type the following command and then press Return:
diskutil verify /
Note: Don't use this method to check non-startup volumes.
You should see messages such as the following during the disk check:
Could not unmount disk for verification, attempting live verify
Started verify/repair on volume disk0s3 Macintosh HD
Checking 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.
The volume Macintosh HD appears to be OK.
Mounting Disk
Verify/repair finished on volume disk0s3 Macintosh HD
Option 3 (advanced): Use the command line and the fsck_hfs -l command.
Start up your computer and log in as an administrator.
Open Terminal (/Applications/Utilities).
At the prompt, type the following command and then press Return to determine your filesytem ID:
df -hl
Look for some lines of text that look like this:
Filesystem Size Used Avail Capacity Mounted on
/dev/disk0s3 37G 20G 17G 55% /
/dev/disk0s5 37G 37G 641M 98% /Volumes/Storage
Make a note of the first "disk" name that appears after /dev/, such as "disk0s3." This is your filesystem ID for your startup volume.
At the prompt, type the following command and then press Return:
df -hl
Then type the following command, where "disk0s3" is your filesystem ID you noted in step 4, then press Return:
sudo fsck_hfs -l /dev/disk0s3
When prompted, enter your admin password, then press Return to begin the verification.
You should see messages like these during the disk check:
** /dev/rdisk0s3 (NO WRITE)
** Root file system
** Checking 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.
** The volume Macintosh HD appears to be OK.
Additional Information
If you're interested in UNIX-style command-line syntax, here's a look at how a couple of flags used in our instruction can influence fsck:
The -y flag: Tells fsck that you want to answer "yes" to all questions about fixing, repairing, or salvaging information. This is the optimal approach, as answering "no" to any question causes fsck to stop. You cannot determine that all necessary repairs have been made until fsck completes and gives its final report.
The -f flag: Forces fsck to check "clean" filesystems when preening.
Macbook Pro 17" 7200 HD 1GB Powerbook G4 (15 inch FW 800) Mac OS X (10.4.6)
Macbook Pro 17" 7200 HD 1GB Powerbook G4 (15 inch FW 800) Mac OS X (10.4.6)
Macbook Pro 17" 7200 HD 1GB Powerbook G4 (15 inch FW 800) Mac OS X (10.4.6)

HT203176 i have a slow macbook, i ran live disk utilities and said I need to repair disk from a cd. did that, I got volume repaired from the external disk. when I reboot from hdd, then run disk utility, I get the same error message i did b4 repair

i have a slow macbook, i ran live disk utilities (from hard drive), turned out I needed to repair disk from a installation disk. Did that, I got the volume (Hard drive) repaired from the installation disk disk. To this point, great!
When I reboot from hdd, then run disk utility, I get the same error message i did b4 repair. I went thru two rounds of this.....
Can anyone help? thanks

Sorry guys, I don't see how to reply to you so I use reply to "me" basically.
So the error I get is "volume header needs minor repair" and then you need to perform repair from the installation disk message.
I did repair not verify from the disk twice. Every time ending in the "the volume had ha been successfully repaired". Then I reboot from the internal disk. Run disk utilities from it, do verify and get the same error message I got before repair. I hope this can shed some light fr you guys. Sorry I didn't include details in the original
MEssage.

I think I goofed when running disk utility, and unmounted at the end and restarted. Now I can't get the disk to mount. What am I missing?

I think I goofed when running disk utility, and unmounted at the end and restarted. Now I can't get the disk to mount. What am I missing?

Which disk won't mount? What version of OS X? Your post is impossible to answer with no useful information.

In Lion, what do you boot to, to run Disk utility?

I did make a bootable USB drive, but unlike on the Snow Leopard Disk there doesn't seem to be anything to boot to so I can run Disk Utility on my drive. Does anyone know? Thanks.

If you still have SL installed, I would suggest you do a Repair Permission Check with Disk Uitlity and do an upgrade within SL instead of using an USB drive.
Actually Lion upgrade on top of SL is anything like minor update from 10.6.7 to .8. That is why Apple prerequiste is to have your machine running SL with 10.6.8.
If you need to run Disk Utility for any reason, I would definitely suggest you do inside SL and start the upgrade like I said earlier.
Hope this helps.

Need to run disk utility on iMac G4 with OSX 10.3.9/Hardware disk 10.2.7

I have an iMac G4 currently running with OS X 10.3.9, which was installed on it after it crashed a few years ago. I don't have any retail disks that match OS X 10.3.9, but I have the original manufacturer's hardware disk that came with the computer, which contains Mac OS version 10.2.7.
My question: In order to run disk utility and repair errors on this computer, do I need to purchase a retail version of the OS X 10.3 disk, or is there some way to run disk utility without the proper OSX disk? I read about checking for possible file system issues using fsck with OS X 10.3 or earlier—is fsck a viable option for me?
My computer is not having any substantial problems, but I want to avoid any by running Disk Utility now ...
Thanks in advance for any and all advice!

Welcome To  Discussions poptartsheart!
"...OS X 10.3.9, which was installed on it..."
How was it installed, and by whom?
You should have been provided a set of the Full Retail Version, of the Panther Install CDs, at that time.
"I read about checking for possible file system issues using fsck with OS X 10.3 or earlier—is fsck a viable option for me?"
You can run fsck, as instructed in this KB Article Resolve startup issues and perform disk maintenance with Disk Utility and fsck, but you really need to have a set of the Panther 10.3.x Full Retail discs.
If you know what to look for, a Full Retail Version, of the Panther Install CDs, can be purchased, sometimes inexpensively, at some online Apple retailers, Amazon, eBay, FastMac, HardCore Mac, AllMac, etc.
ali b

Unable to reload os or Run Disk utility off osx dvd

Late 2007 Macbook Pro ( 2.53 , 4gb Ram, 320 GB hd) Will Load into osx but has the grey status bar at every boot ( Approximate 10 Mins for full boot) Ran disk utility in osx found issues and says run off DVD to repair the disk. Ran disk utility off the original DVD that came with the mac, wont find the hard drive to run disk utility. try to reinstall the OS. The installer wont find the hard drive? any idea how to resolve the issue so I can re install the OS to remove the grey status bar.

CentCorey wrote:
I can make a partition on the HD.
You'll have to decide which works best for you:
-boot from install disc, partition the external HD, install OS X on it, boot from it and see if HD shows up there so you can try to repair it (make sure you don't wipe out your TM data; your internal HD may not be reliable).
-get DiskWarrior or TechTool Pro or another disk repair utility and see what it can repair (note that these are more expensive than a new HD, but can come in handy to have around).
-get one of the SMART utilities that supposedly tell you more about your HD (I'm not a fan of either of the ones I've seen/tried and am far from confident in their results).
-get a new HD and try restoring from your TM backup.
-get an external enclosure (15 bucks or so for a USB model from newegg, amazon, macsales and others).

Inconsistent Disk Utility Results

When I run Verify Disk in Disk Utility from my boot drive, it tells me the drive needs repair. See log below.
Then when reboot from the recovery partition and run Verify Disk from the recovery partition, it says the disk is okay. Same if I run repair disk. What gives?
Log:
Verifying volume “JDS Macintosh HD”
Checking storage systemChecking volume.
disk0s2: Scan for Volume Headers
disk0s2: Scan for Disk Labels
Logical Volume Group 5E521F4E-58F6-4069-B3C4-8F9FC44F58D7 on 1 device
disk0s2: Scan for Metadata Volume
Logical Volume Group has a 16 MB Metadata Volume with double redundancy
Start scanning metadata for a valid checkpoint
Load and verify Segment Headers
Load and verify Checkpoint Payload
Load and verify Transaction Segment
Incorporate 0 newer non-checkpoint transactions
Load and verify Virtual Address Table
Load and verify Segment Usage Table
Load and verify Metadata Superblock
Load and verify Logical Volumes B-Trees
Logical Volume Group contains 1 Logical Volume
Load and verify B9AFF121-97DC-4C18-AC82-DF352B0C4313
Load and verify 6795ADE3-BB8D-4D3C-AF19-34B0C5848617
Load and verify Freespace Summary
Load and verify Block Accounting
Newest transaction commit checkpoint is valid
Load and verify Segment Cleaning
The volume 5E521F4E-58F6-4069-B3C4-8F9FC44F58D7 appears to be OK.
Checking file systemPerforming live verification.
Checking Journaled HFS Plus volume.
Checking extents overflow file.
Checking catalog file.
Checking multi-linked files.
Checking catalog hierarchy.
Invalid directory item count
(It should be 860 instead of 861)
Checking extended attributes file.
Checking volume bitmap.
Checking volume information.
The volume JDS 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.

Okay, I have got a bit farther into this. I used CarbonCopyCloner to clone my drive to an external Thunderbolt drive and booted from the external. When I ran verify disk from the external it reported the same errors on the internal as it did when verifying while booted from the internal. Moreover, Disk Utility was able to repair the errors.
So it seems there is a bug of some sort in running Disk Utility from the recovery partition. It neither correctly verifies the disk nor does it repair it.
The errors are not, apparently, false positives as suggested above. DU, when booted from the recovery disk, reports a drive as healthy when it is not.

OS X System Freezes While Running Disk Utility repair permissions

While trying to pepair permissions systom freeze up. So I put in the startup disk hit restrat holding down c and tried to repair permissions that way and it froze up that way too. I had to manually turn off machine. What is going on?

Thanks for your response, I only have one disk. 10.5.1 I have 10.6 on usb drive. I will try running Disk Utility from the first DVD and instead of repair permissions try to repair your drives. The reason I was repairing permissions is I have an app called video converter and when I opened it I got an error window. Ok I will try repair disk. If that doesnt work I guess I will have to reinstall the os? Is that right? Ok, here I go to try it.

Disk utility is reporting no errors

Hi,
My MBP has been reporting issues over the last few days and recommending that I verify the disk. Whenever I do this, it says that it finds errors and I should reboot with comamnd-r pressed and choose disk utility. Which I do. However when I try to verify the disk or repair the disk in this mode, it never finds any issues? Logging back in and running disk utility will again report issues and recommend repairing
What should I do?
Thanks
Liam

Just noticed other errors reported by Disk Utility ...
Incorrect block count for file lsm_map
(It should be 16129 instead of 17178)
Checking multi-linked files.
Checking catalog hierarchy.
Checking extended attributes file.
Checking volume bitmap.
Volume bitmap needs minor repair for orphaned blocks
Checking volume information.
Invalid volume free block count
(It should be 27769461 instead of 27768412)

Recovery system disk utility doesn't see errors reported on startup volume

When I check for disk errors on my macbook pro, disk utility runs ~5 minutes, then quits, reporting errors:
2013-11-21 07:46:27 -0600: The volume Macintosh HD was found corrupt and needs to be repaired.
2013-11-21 07:46:27 -0600: 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.2013-11-21 07:46:27 -0600:
2013-11-21 07:46:27 -0600: Disk Utility stopped verifying “Macintosh HD”: 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.
2013-11-21 07:46:27 -0600:
When I start up with the Recovery HD and run disk utility, it runs ~30 seconds and reports no errors.
Any suggestions for what to do next?

Seems to me something must be wrong, given the different reports. Not so? Mail in outlook has gotten slow, but who knows what that means. Can I startup wth an older OSX disk and try the disk utility from that?

Trying to run Disk utility on internal HD

Okay, I'm trying to install BootCamp, and the utility says that there are problems with the hard drive, run Disk Utility. Which I do, it finds several problems, but can't fix them because it is the startup disk. It tells me to boot from the install DVD that came with the computer.
Well, I tried that this morning, and here's the results:
1) Put in DVD, double click on the "Install" icon. Window comes up, I press the Restart button, enter my password, and the computer restarts from the hard disk, not DVD.
2) Select "Startup Device" from the System Preferences. DVD doesn't appear in the list.
3) Run the "Startup Device.app" program on the DVD. DVD appears in the list, but selecting it and clicking "Restart" does nothing (computer doesn't restart)
4) Holding the 'c' key down while restarting the computer results in a black screen with a flashing underscore/prompt in the upper left corner of the screen. Computer is unresponsive, have to hold the power key down to shut it off.
What do I need to do to fix this? Why won't the computer boot off of the DVD that it came with?
Thanks!

Out of curiosity...did your machine have its logic board replaced? If so, the install DVD that came with the MBP originally will not work; you will need to use the ones provided with the replacement logic board. (It's a 10.4.5 vs. 10.4.6 issue).
If that isn't the case...it sounds like you may have a bad install disc OR that your machine's NVRAM is a bit confused... To see if that's the case, try resetting the PMU (which also clears the NVRAM). Instructions are here: http://docs.info.apple.com/article.html?artnum=303319
Good luck.

Cannot run Disk Utility, use terminal, or boot from CD, all HDs locked

I have a Mac Pro with 4 internal drives and 3 of them suddenly locked themselves. I can't run Disk Utility -- I get "underlying task reported failure on exit."
I can't boot from Disk Warrior CD. I hold down the C key til the Apple logo appears, and then the computer just restarts into my regular system on my hard drive.
I can run some apps from my startup drive, (obviously I can get on the internet). I downloaded Drive Genius but it will not install.
I cannot use the terminal to try any of those fancy tricks I read about here.
Here's what I get when I try Terminal:
login: PAM Error (line 396): System error
login: Could not determine audit condition
[Process completed]
And after that, I cannot type in the Terminal window.
Man, this is crazy. 2 of my other internal drives have backup systems on them, but they will not show up as choices in the startup disk section of my system preferences - cuz they are locked.
Any suggestions? I'm about to install a new drive and try and clone my working system on it and put Disk Warrior on it.

DJWillis wrote:
Wait, can I use Terminal from another computer in target mode?
yes, but do you mean you can boot it in target mode but not from a DVD? this is very strange. try booting fro a DVD in a different way. reboot and hold "option" at the chime. this should boot you into startup disk manager. normally you can insert the DVd at the point and choose to boot from it.

My 3 year-old macbook pro is very slow. I have run disk utility and virus scan with no improvement. The "beach ball" will spin for minutes at a time when opening, closing or changing windows. Apple Store looked at it a few months ago with no help.

my 3 year-old macbook pro is very slow. I have run disk utility and virus scan with no improvement. The "beach ball" will spin for minutes at a time when opening, closing or changing windows. Apple Store looked at it a few months ago with no help. What can I do?

Under CPU: 3.5% user; 5% system; 91% idle; 441 threads; 90 processes.
Under System: out of 2GB - 54.7MB free; 530MB wired; 603MB active; 862MB inactive; 1.95GB used.
Is too much of the system memory tied up? If so, what can I do to free some up?

Running disk utility resulted in an error... what should I do next?

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