Disk Utility unable to verify disk (Error -9972)

Please help! I downloaded the Security Update 2007-004 and my comp crashed! When I turn my computer on I get a folder icon in the middle of the screen and it won't start.
I tried using Disk 1 to get to my harddrive. I got to Disk Utility and tried to verify disk. But I got the following message.
Invalid B-tree node size.
Volume check failed.
Error: The underlying task reported failure on exit. (-9972)
So I can't verify and therefore can't repair my disk. I need my computer for my school assignment. Please please help.

Welcome To Discussions jo*!
Do you know what size the Hard Drive is, and how much space is available?
Although that error is not exactly good news, it is not necessarily a death knell.
DiskWarrior, does indeed, have a high success rate at rebuilding when Disk Utility reports "Underlying task reported failure" when repairing a volume (Error -9972).
In the above link it states;
*Back up as much of your important data and files as you can, then try using a third-party disk utility to repair the drive. Be sure that you use one that works with your version of Mac OS X."
DiskWarrior, also linked above, is just such a third-party utility.
But just in case it is unsuccessful, and you need to perform an Erase & Install, I suggest that if possible, you back up the system, or at least any data that you cannot afford to lose.
If you have access to another Mac that is Firewire enabled, you might be able to backup, or retrieve data, using Firewire Target Disk Mode.
Good Luck!
ali b

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Googling for the term
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Disk Utility unable to Verify/Repair Permissions since this week's update

Hey there folks- I am experiencing some software problems with certain apps not launching (I understand it is an issue with QT now but am not clear on how to revert... Help?) and naturally panicked a bit.
I went into Disk Utility and tried to Repair Permissions.
Starts checking and then claims to lose connection and that I need to quit it and relaunch. This, of course, tells me that I am about to corrupt the disk and will "pay" for it (not seriously but feels like it!).
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Oh dear lady upstairs! Sorry to not have responded sooner- I never got the message that you had answered me... Bit odd that!
OK- thanks for that. I do so like understanding what I am doing and, more importantly- WHY!
Will do and let you know if that sorts matters...
As for QT- I hear tell that it can interfere with the running of applications and I certainly had a lot more than just Disk Utility fail on me. Stuff APPEARS to launch and then just stops after a few bounces of the icon on the dock.
Of course that TOO began only after the update.
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Unable to verify update ios 8.0.1

my ipad can not verify with a message Unable to verify update.
ios 8.0.1 failed verification because you are no longer connected to the internet.
How can I fix this while internet is on, even I change to cellular data.

Here's a screenshot of my iPad's "Unable to Verify Update" error message. Note above that, my status (below "iOS 8.0.1, Apple, Inc." says, "Downloaded".
I'm wondering if anyone else who's getting the "Unable to Verify Update...because you are no longer connected to the Internet" has anything different that "Downloaded" status.
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My Configuration: iPad Mini 32MB (first version), iOS 8.0

10.9.2 "unable to verify update" OSX

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Tom,
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Can you look in the installer log file (it should be created in /tmp/install*.log or in /var/tmp).
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rpm -e `rpm -qa|grep sims-product`

Disk utility verify drive error

When I run disk utility I receive the following error. In reading previous posts I discoverd that I needed to use the OSX install disk. So I get it showing in the utilities window on the left side and attempt to get disk utility running by following this path on the disk -- Applications > Utilities > Disk Utility. Double clicking disk utility has no result.
Any suggestions would be appreciated.
The error when running verify disk from disk utility on the iMac:
Verifying volume “Macintosh HD”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Invalid node structure
The volume Macintosh HD needs to be repaired.
Error: The underlying task reported failure on exit
1 HFS volume checked
Volume needs repair

As Doug has said, & indeed you have tried....you need to run diskutility from the OS install disk. Or more accurately, you need to run diskutility when booted from the install disk.
The following ( from diskutility help) should explain it clearly.
Start up your computer using another disk.
To use the Install Mac OS X disc, insert the disc and restart your computer holding down the Option key, then select the Install Mac OS X disc and click the arrow.
Open Disk Utility.
If you're using the Mac OS X Install disk, follow the onscreen instructions until the menu bar appears with the Utilities menu in it., and then choose Utilities > Open Disk Utility.
Select the startup disk in the list of disks and volumes, then click First Aid.
Check the S.M.A.R.T. Status at the bottom of the window. If you can't see it, be sure you selected the hard disk your volume is on, and not the volume itself.
If the S.M.A.R.T. Status is "About to Fail," back up your files on the disk as soon as possible and replace the disk.
If the S.M.A.R.T. Status is "Verified" or "Not supported," click Repair Disk to repair the disk.
If Disk Utility tells you to look for links to corrupt files in the DamagedFiles directory, two or more files occupy the same space on your hard disk and at least one of them is likely to be corrupt. Examine each affected file in the DamagedFiles folder, which at the top-level of the affected disk. If you can replace it or recreate the file, delete it. If it contains necessary information, open it and examine its data to make sure it has not been corrupted.
If Disk Utility reports "The underlying task reported failure," Disk Utility encountered a problem it could not repair. Back up as much of your data as possible, reformat your disk, reinstall Mac OS X, and restore your backed up data.

Disk Error When Verifying with Disk Utility

I have a macbook pro intel with osx 10.4.8. I'm having trouble putting stuff into and emptying the trash so i tried the mac os disk utility. when i verified it i got the following error message
Verifying volume “Macintosh HD”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Invalid sibling link
The volume Macintosh HD needs to be repaired.
Error: The underlying task reported failure on exit
1 HFS volume checked
Volume needs repair
The disk repair button remained grayed out so i couldn't perform the repair. any ideas?

You're in troubles. :-/
You can try another disk utility, but basically, the best to do, first, is a low-level formatting (format with the "zero data" option checked).
If it finish that, then reinstall a system and go ahead (keep backups up to date tho)
If it does not, you will have to get the hard disk changed.
Why reward points ?

Disk Utility "Unable to create" Disk Image "error -39"

I am trying to create a disk image using Disk Utility of my wife's user area for backup. Everytime I try, I get the same result. Disk Utility spends several hours creating the archive, then at the very end it generates an error message and terminates the process. The error message is always "unable to create "user" - error -39".
The problem follows her data and not her computer. I backed up her user to an external drive and did the image creation on another computer. Same result.
When I do the same on my computer, the process completes fine.
What problem is Disk Utility having? Where can I find the meaning of Disk Utilitility's -39 error?
PowerBook G4 Mac OS X (10.4.5)

I am still experimenting. To narrow the problem, I decided to create individual disk images of the folders in the User folder. The first one I tried was 7 GB and worked fine. Overnight, I tried one that is 13 GB. It failed with an out of room message on the startup disk! The startup disk has 17 GB free. Nothing should have been written to the startup disk!
This time, I configured Disk Utility to read from the startup disk and write to an external disk. The destination disk had more than enough space. But, I ran out of space on the source. It appears that Disk Utility is writing all or a portion of the compressed file to either the startup or the source disk and running out of room.
Previously, when I created the image of my user folder (instead of my wife's), the source was my user folder on the startup disk and the destinaion for the image was on an external disk. The difference I see is that my startup disk has enough free space for the entire compressed image file.
In my first attempt that gave me the -39, both the source and the destination disks were external. So maybe Disk Utility is creating the image on the source and at the end copying it to the destination. This would explain the difference in the error messages.
I'll try to confirm all of this in the next few days and report my findings.

Disk Utility: after creating the .DMG (compressed image) When "scan image for restore" finishes it displays "unable to scan (internal error)". Since the process was scanning for about 1 hr is this a fake warning?

External 500GB drive is partitioned with 400GB for Mac OS extended (journalling) and 2nd partition formatted today as "ExFAT".
Yesterday I tried to create a disk image of my HD to no avail - this was compressed on a FAT partition. I got a warning after running the <scan image for restore> saying "unable to scan (internal error)"
I rang Apple support who suggested formatting a partition as MAC OS extended (journalling) and choose to save the image as "read/write'. The image process stopped writing at about 200GB and then the file size jumped to 499GB (ie the size of the HD). But the process did nothing for about an hour so I foce quit disk utility (as suggested by apple support)
My current attempt was to format the external drive again; this time with a 400GB Mac OS extended (journal) format; plus a 100GB ExFAT format partition. The new image was created after about 2.5hrs with a compressed size of 149GB. However, after running the "scan image for restore" facility I got the warning message "unable to scan filename " (internal error). The process was scanning the image file according to the progress bar - this took about hour - thus the warning is a puzzle.
If anyone can say more about this error I would really appreciate knowing tips for using disk utility. The screen grab is below.
"unable to scan filename " (internal error)
thanks

Thanks for a quick reply <baltwo>. You’ve answered that it is not a fake message!
fyi: I thought that I would use my external Buffalo for two purposes; namely the smaller ExFAT partition for copying stuff to my win7 netbook. The larger partition was to be used as my imac image of SL. So this was my first attempt at using disk utility - the idea being to hold an image backup at another location. Plus I now have the Lion thumbdrive ready to upgrade from SL and so being cautious wanted to have a SL image backup
Anyway I followed the apple instructions using my mac 10.6.3 install DVD but it would appear from other discussions that <unable to scan (internal error)> is not unique to me.
I’ll get back to apple telephone support for further advice.
I would though be grateful for an “idiots’ guide to making an image backup of my internal HD that runs SL 10.6.8
eg should I have just one partition on the external USB drive? format it as Mac OS extended? create the image as compressed or read/write? Basically I’ll do whatever will work!!
thanks again

Disk Error - Unable to fix with disk utility

My mac was acting a little wonky today - I noticed that some programs weren't shutting down when I tried to quit them, so I ran Onyx. Immediately I recieved the note that I needed to repair my start disk with the installation disk. So, I tried that. The disk utility was not able to repair it - The error I received was " Invalid catalog record type
Volume check failed
1HFS Volume Checked
1 volume could not be repaired because of an error
I thought about purchasing Disk Warrior to try to repair it but I have no idea if it will even work on this type of error. I did free up quite a bit of space from my HD because I thought perhaps there wasn't enough free space and ran the disk utility again. received the same error. I am a bit technically challenged when it comes to trying to troubleshoot. I thought perhaps someone would be able to tell me if I should invest in DW or I should just replace the Hard Drive. It's only about 9 months old. Thanks so much.

That is a directory error. It can be fixed with software, but Disk Utility is not an Industrial-strength fixer. There is NO compelling reason to replace your hard drive hardware.
Disk Warrior is a File utility. It works very hard to collect all possible information about your files, build a new directory, and (only if you allow it) to replace the old directory with its new error-free directory. It is a good tool to have on hand, and well respected in this marketplace.
It is not sensitive to the type of error encountered -- it will use all available info to build a new directory from scratch. That will eliminate the error. I own and use Disk Warrior, and recommend it.
You should be careful about using 10.3 and older versions of ANY Utilities on 10.4 and later directories, as the directory format changed a bit with 10.4.
I got a card in the mail for a US$50 (plus US$12 for discs) offer good through 31 October 2009 for several Utilities including Tech Tool Pro (another alternative to Disk Warrior). You definitely want the bootable disc of any disk repair utility you buy. It generally takes about five minutes to boot up, but it leaves your hard drive completely available to be repaired.
I have no connection to this company and do not know if it is reputable. Their package requires 10.4, 10.5, or 10.6 and seems to be offered by Intego as a promotion for their Virus Barrier and other software.
http://www.macpromo.com/

Lacie Big Disk BIG ERROR (-9972)

Below is the definition for the issue I'm having on my G4. I've used disk Utility, Drive Genius and Disk Warrior. None of them could fix the issue. The solution below states that I should "back Up" the disk and start fresh. Here's the problem: How I access files on a drive won't allow me to see what's on it?
Any help will do.
Much Thanks.
~MF
Symptoms
In rare circumstances, Disk Utility may display the following message when you try to verify or repair a disk:
"The underlying task reported failure"
The Disk Utility log will also display a -9972 error code. This indicates that your disk volume has issues that Disk Utility cannot fix.
Products Affected
Disk Utility, Adobe Photoshop CS2, Adobe Illustrator CS2
Resolution
What can I do?
If you experience this rare occurrence, you should attempt to resolve the issue as soon as possible.
Try using fsck in single user mode, or start up your computer from a different volume before verifying or repairing.
Back up as much of your important data and files as you can, then try using a third-party disk utility to repair the drive. Be sure that you use one that works with your version of Mac OS X.
Back up as much of your important data and files as you can, then perform an Erase and Install installation of Mac OS X on the affected volume.
Important: This option completely erases the destination volume and then installs a new copy of Mac OS X. You should always backup important files on the target volume before performing an Erase and Install installation. You can then restore your backed up files afterwards.

Hi, ~MF -
It is good practice to cite the source of quoted material; if possible, give the link to the aarticle. In this case, it would appear that you quoted a portion of this Apple KBase article -
http://support.apple.com/kb/TS1901
If you have tried to do what you can using Disk Utility (while booted to a CD) and Disk Warrior, try using a data retrieval program to capture your data from the drive before re-initializing it, such as -
Data Rescue
Virtual Lab
Both of those have trial versions available for download; either may have restrictions re what versions of OSX they support.

WD External disk Error: Filesystem verify or repair failed

Hi all
My Western Design external hard drive has started to run really slowly when accessing data as well as transferring. After plugging the usb to the mac it takes about 30 seconds to pick up the drive with a DISK ERROR message. I have been into disk utilities and tried verifying the disk and repairing with the following message coming up...
Verify and Repair volume “LEILA”
** /dev/disk1s1
** Phase 1 - Preparing FAT
** Phase 2 - Checking Directories
Unable to read directory (Input/output error)
Error: Filesystem verify or repair failed.
Details of the external follow:
Disk Description : WD Elements 1023 Media
Total Capacity : 465.8 GB (500,105,740,288 Bytes)
Connection Bus : USB
Write Status : Read/Write
Connection Type : External
Partition Map Scheme : Master Boot Record
Any help would be appreciated
Thanks

It sounds like your WD drive is failing. Download Smart Utility from http://www.volitans-software.com/smart_utility.php and see what it says about the health of the drive.
If you scan various discussion groups, you'll see issues with WD external drives, as the electronics can be problematic.

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.

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)

Disk Utility unable to verify disk (Error -9972)

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