Repairing Hard Disk

Hi all -
I am running OSX 10.3.9 on my Tower G4. I just backed up a bootable copy of my hard disk onto my new external hard drive, shut down my computer, then successfully booted from the backed up copy on my external drive.
I then tried to verify and repair my internal hard drive with Disk Utility, but got this message instead:
Invalid extent entry
Volume check failed.
Error: The underlying task reported failure on exit (-9972)
Repair attempted on 1 volume
0 HFS volumes repaired
1 volume could not be repaired
What does that mean?
Do I care? Assuming I do, how do I fix it?
TIA for any thoughts -
– OF

Yes, that will indeed be feasible. You can do the following:
1. Boot from your external bootable clone, then open Disk Utility.
2. After DU loads select your internal hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. Otherwise, click on the Partition tab in the DU main window.
3. Set the number of partitions from the drop down menu to one. Set the format type to Mac OS Extended (Journaled.) Check the option to install Mac OS 9 Drivers if you are planning to install OS 9 and boot from it. Click on the Partition button and wait until the procedure 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 Options 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.
7. After the formatting has completed do the following:
a. Select the destination volume from the left side list.
b. Click on the Restore tab in the DU main window.
c. Drag the destination volume from the left side list to the Destination entry field.
d. Select the source volume from the left side list and drag it to the Source entry field.
e. Double-check you got it right, then click on the Restore button.
Destination means the internal hard drive.
Source means the external hard drive.

Similar Messages

How I installed Mountain Lion on Un-repairable Hard Disk.

My Recommendations for Avoiding Trouble, Avoiding Risk, and Saving Time.
1) Make a boot clone first!!!
      http://www.bombich.com/
http://www.shirt-pocket.com/SuperDuper/SuperDuperDescription.html
2) Fix and repair your hard disk with Disk Utility and fsck_hfs before installing Mountain Lion!
    (Otherwise the installer will write-lock the disk preventing repair.)
Mountain Lion Aborted Installation—Claimed Hard Disk Failed, Couldn't be Repaired, and Should be Replaced
I have a 2011 MacBook Pro. Installation of Mountain Lion aborted claiming the hard disk could not be repaired by Disk Utility, should be backed up immediately, and replaced. It didn't make sense that the drive was booting up the computer for installation, but needed replacing. I removed the drive, put it in an external enclosure, and backed up the drive using a working Mac Mini, and Carbon Copy Cloner.
Hard Disk Was Write-Locked—Not Failing
Booting in Single User mode (hold command and S keys down while bootup is proceeding). I then typed in the fsck command given after Single User bootup. It informed me the drive was write-locked and read only. Now things were starting to make sense. Disk Utility couldn't repair the drive because it was write-locked! Maybe it could have been unlocked by the "chflags nouchg /Volumes/volume" or "chflags noschg /Volumes/volume" commands (http://hints.macworld.com/article.php?story=20031017061722471), but I didn't try it. Unlocking the drive is really worht a try because it could save hours of coppying through a slow USB interface.
I formatted my laptop drive after copying it to another large external drive. Then I used Carbon Copy Cloner to clone Snow Leopard from my Mac Mini to my freshly formatted original laptop drive. I unsellected the "Users" folder so I would only get the operating system—saving lots of hours copying data I don't need. Then I put the drive back in my laptop, and it booted with Snow Leopard. Checked the volume with Disk Utility and was informed the drive is fine. I removed the drive and connected it externally to my Mac Mini and ran fsck_hsf a few times in the terminal, which showed problems were found and fixed.
sudo fsck_hfs -fy /dev/rdisk1s2
Password:
** /dev/rdisk1s2 (NO WRITE)
   Executing fsck_hfs (version diskdev_cmds-491.6~3).
** Verifying volume when it is mounted with write access.
** 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.
   Volume bitmap needs minor repair for under-allocation
** Checking volume information.
   Invalid volume file count
   (It should be 550614 instead of 550591)
   Invalid volume free block count
   (It should be 175459733 instead of 175460263)
** The volume MacBookPro HD was found corrupt and needs to be repaired.
3) sudo fsck_hfs /dev/rdisk1s2
Password:
** /dev/rdisk1s2 (NO WRITE)
   Executing fsck_hfs (version diskdev_cmds-491.6~3).
** Verifying volume when it is mounted with write access.
** Checking Journaled HFS Plus volume.
fsck_hfs: Volume is journaled. No checking performed.
fsck_hfs: Use the -f option to force checking.
[karl_ihrig] 4) sudo fsck_hfs -f /dev/rdisk1s2
** /dev/rdisk1s2 (NO WRITE)
   Executing fsck_hfs (version diskdev_cmds-491.6~3).
** Verifying volume when it is mounted with write access.
** 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.
** The volume MacBookPro HD appears to be OK.
5) sudo fsck_hfs -fy /dev/rdisk1s2
** /dev/rdisk1s2 (NO WRITE)
   Executing fsck_hfs (version diskdev_cmds-491.6~3).
** Verifying volume when it is mounted with write access.
** 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.
** The volume MacBookPro HD appears to be OK.
6) sudo fsck_hfs -fy /dev/disk1s2
** /dev/rdisk1s2 (NO WRITE)
   Executing fsck_hfs (version diskdev_cmds-491.6~3).
** Verifying volume when it is mounted with write access.
** 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.
** The volume MacBookPro HD appears to be OK.
I put the drive back in the laptop and repeated the fsck commands after a Single User boot. (Omited the sudo commands and used /dev/disk0s2.)
Downloaded and Successfully Installed Mountain Lion on "Unreparable" Drive
I downloaded the Mountan Lion installation application to my laptop, ran it, and had a smooth install.
More Trouble Migraiting My Applications and Directory
I expect to use up more time changing my computer name, migrating applications and rsyncing my User Directory. I will post how I achieve this.
I Hope People Avoid Trouble and Problems are Solved
I hope everyone will avoid trouble by making boot clone of their whole disk before attempting an install of ML and repairing their disk with Disk Utility and fsck before ML installer prevents it with a write-lock. Please see the first section.
I hope this solves other peoples problems with 'unreparable' disks. I believe this proves disks are repairable when ML says otherwise.
Good luck everyone!

troca, you certainly helped dtigerbme! Isn't that encouraging?
I recommend you copy your drive as soon as possible. I really don't think the drive is bad, but you may have to format it and copy back to it. Hopefully not. Clone or backup the drive before trying this recipe. Any time you have errors on a drive, back it up. A failing drive has lmited life. However, I don't think these drives are really failing, but that is my opinion and I break a lot of things.
Let's try this recepie for you:
Start in Single User Mode. Power on while holding the Command + S keys.
At the prompt, type "fsck_hfs -fy" or "fsck -fy" and hit return.
Do it again.
Enter the command "reboot".
Just googled "volume count disk utility" and got the same recipe to fix it.
http://counterjumper.com/post/19265700171/how-to-fix-invalid-volume-free-block-c ount-error-in
So my recipe is to try to fix the drive without taking it out of the computer, which requires you can boot it up.
troca it looks like Apple has said that error is benign and can be ignored in 2010.
http://support.apple.com/kb/TS2028?viewlocale=en_US&locale=en_U
I do believe fsck will fix it though.
Some other results from the same search:
http://forums.macrumors.com/showthread.php?t=1071850
https://discussions.apple.com/thread/3635034?start=0&tstart=0

Gray screen on start up and not able to repair hard disk and not able to take back up.

My macbook pro bought in early 2011 with snowleopard software and than upgraded to lion is now running on system 10.7.5 .
My problem is i get a gray screen on startup with apple logo and spinning ball.
I tried all the solutions mentioned in the apple support for "gray screen appears during start up". This Disk utility says that the Hard disk cant be repaired.
Before i format my disk and erase all data and install Mac os x again, i want to take back up on a external hard disk. I bought a new 2tb external hard disk so that i can take a back up.
As i try to take the backup of the image, it gives me an error "cannot allocate memory"
i tried to change the configuration from compressed to read/write and tried different encrption methods but unable to take backup.
i sometimes get error "input/output".
how do i take a backup. somebody please help

See OS X- Gray progress bar appears under Apple logo during startup. If you need to reinstall OS X, then do this:
Reinstall Lion, Mountain Lion, or Mavericks without erasing 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
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 then click on the Repair Permissions button. When the process is completed, then quit DU and return to the main menu.
Reinstall Lion, Mountain Lion, or Mavericks
OS X Mavericks- Reinstall OS X
OS X Mountain Lion- Reinstall OS X
OS X Lion- Reinstall Mac OS X
Note: You will need an active Internet connection. I suggest using Ethernet
if possible because it is three times faster than wireless.

Disk utility can't repair hard disk

I have set up my old iMac G3 for my 4 yr old grandson to use. It spontaneosly shuts down at random times, with no apparent provocation. I ran disk utilities from the OSX install disk to see if the hard disk needed repairing and got a long list of problems. I ran the repair program several times, including the permission repairs, and it doesn't seem to do any goodI don't know what other programs there are that might help.

Disk Warrior fixes most problems that Disk Utility cannot.
However, you may be wiser to erase the drive then reinstall:
Drive Preparation
1. 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 Utilities menu.
2. After DU loads select your hard drive (this is the entry with the mfgr.'s ID and size) from the left side list. Note the SMART status of the drive in DU's status area. If it does not say "Verified" then the drive is failing or has failed and will need replacing. SMART info will not be reported on external drives. Otherwise, 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.
7. Quit DU when formatting has completed then install OS X.

How to repair hard disk on lion

I opened disk utility and verified permissions.
Then i tried verifying the hard drive and it said it was corrupt and needed repair. i tried booting from external hard drive and then repairing but it said it could't unmount the disk.
i restarted from my macbook(not the external) with the shift key down and tried repairing from there. it said there was something wrong in the catalog and 287 should be 288..and the hard drive was corrupt..but i couldn't repair it from there.
now what?
I started this whole thing because my computer was acting funny at start up..

I found this from looking in lion corrupted my hard disk and found this answer. It worked for me!!
I had a corrupt HD after installing lion. Repair disk said to boot from startup disk. I have no startup disk because OSX lion is a downloaded install...But wait...Apple in ther infinite wisdom created a boot disk partition on your HD. Do this:
1) Reboot the Computer and hold down the option key.
2) Select the Boot drive as your start-up disk. The system will boot and give you a menu of options.
3) Run Disk utility.
4) Repair disk. (My corrupted drive was repaired)
5) reboot.
Voila..All is well with the world. Hope this helps.

Error when trying to install Mountain Lion - says hard disk is damaged :(

I downloaded and installed Mountain Lion on my iMac today - without any problems. But when I downloaded it to my Macbook pro (bought 2010) I get an error message telling me the installation cannot continue due to hard disk error My harddisk was fine before the installation, to my knowledge ...
Of course I tried disk utility (during the installation) and it tells me the disk needs to be repaired but I can´t choose "Repair disk" since it is grey (no write permissions it says). What can I do? I really need help!!!

I rarely post, however, because of a major screw up with Mountain Lion, I will. I have been using mac computers since 1987, have obviously installed and upgraded multiple OS new and upgrades and never, I mean never had a problem with any of them, until now. The install stalled with the message that the hard disk needed repair. I thought all of my data was lost, except for time machine backup, which was not as current as it should have been. Losing that data would have been a royal pain.
Went through the restore OS from Time Machine, then tried to repair the disk with apple disk repair utility. Not repairable. Why? I still don't have a clue. After reading multiple threads, decided to go ahead and buy DiskWarrior. This was a weird experienc. Loaded it onto external hard drive, hooked my MacBook Pro as Target disk. Loaded in DiskWarrior as hardware probelm. ???? Immediately went online to see what advice about this message. Looked like a massive coincidence had hit my laptop. Worked perfectly until loading Mountain Lion, the decided to have hard disk melt down. Suddenly, DiskWarrior indicated it was ready to rebuild my directory. The hardware warning was gone. A few minutes later, directory repaired. Rebooted, same problem. Can't load OS X, need to repair hard disk. Apple disk repair still unable to repair disk. Used DiskWarrior, repaired it no problem.
Deleted original OS 10.8 dmg. Rebooted and downloaded fresh copy of OS 10.8. This time install went flawlessly. Mountain Lion transferred all info flawlessly. Mid 2009 MacBook Pro running flawlessly and actually more smoothly now than in Lion.
1. I think original download was somehow corrupted and that is what screwed up the disk directory.
2. I do not know why apple Disk Utility would not repair the disk and Disk Warrior would. Expensive fix, but ultimately worthwhile. Did it mysefl and did not have to mess with "Genius" bar.
3. I will never go so long without backup again. That was a big mistake.
My advice:
1. Be sure you have smooth download of entire Mountain Lion file, if not, start over. My download was paused a couple of times.
2. If the install is messed up and you need Disk Repair, buy DiskWarrior and repair directory, it works flawlessly. If it initially says your disk has hardware problem, wait a few minutes while it finishes entire evaluation. It may well disappear like mine did, then actually repair the directories without a problem.
3. Be sure you have deleted old OS 10.8 Install file and load fresh one.
4. Install OS 10.8 and you should be OK.
5. Good luck.
Mountain Lion seems to have some problems, but many of them may be due to server overload at apple, delayed download with incorporated unrecognized code problems. If there is any delay, start over and get a smooth download.
Disk Utility is too light weight. Apple needs to beef it up. This is my biggest complaint. Apple utility should be able to fix disks. We should not have to spend $100 to fix a disk, but there you are.
Once fixed however, back to usual beautiful, flawless apple experience.

Is my hard disk telling me it gonna die?

Hi all,
I have all sorts of troubles since I install (after initialising it, with zero write) Snow Leopard on my MacBook 2.'GHZ, 2008-11.
Now, a newly created window opens in the top middle of the screen (instead of some pixels from the left).
I also get tons of errors using the MacBook (most of the AppleScripts created after the install) works or not, I never know before executing them if they will work or not (most of the time, they just do not work).
Extensions off boot leads to the same experience.
Disk Utilities: check or Repair hard disk find no error, repair the permission does not modify anything.
Every advice will be checked carefully.
Greatings from Strasbourg, France.
Emile

LuckyEmile wrote:
I am not sure if installing SL on an external hard disk is an effective test.
Yes, an external is a perfect way to test a new system. Then, when you're sure it's OK just clone it over to your internal using SuperDuper or CarbonCopy Cloner.
I believe what Barry is suggesting, is that you reapply The 10.6.3 Combo Update This is a fuller install, as opposed to an incremental "delta" update so it should overwrite any files that are damaged or missing. It does not matter if you have applied it before.
Remember to Verify Disk before update and repair permissions after update from /Applications/Utilities/Disk Utility.
When you reformat, make it "Mac OS Extended (Journaled)"
-mj

Disk Errors Reappear Within Day After Repair-Hard Drive Dead?

Over the last few weeks, I have been experiencing crashes on my Macbook Pro. The crash would appear as such:
I'll be using Chrome and all of a sudden pages won't load. The mouse continues to work, but if I navigate to the desktop, folder won't open. Then, if I try to quit programs, the dock either becomes unresponsive or programs will only quit if "forced quit." Then the beachball of death appears. The beachball of death will continue for a very long time—perhasp indefinitely, so I decide to manually power down the computer.
I have tried to verify the hard drive in Disk Utility, and a few times I have gotten this error:
Volume bitmap needs minor repair for orphaned blocks
Checking volume information.
Invalid volume free block count
(It should be 46122698 instead of 42839276)
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 Mac OS X Utilities window appears, choose Disk Utility.
So I restart from the system (command-R) and repair the disk. But now within a day or two I get the same error.
Does my hard drive need to be replaced? Am I on borrowed time? My computer is under warranty. Do you think Apple will replace the hard drive?
Thank you for your help!
P.S. I have my data backed up to Time Machine, so I am not in imminent danger of losing priceless files.

papayaman wrote:
Does my hard drive need to be replaced?
Sure sounds like it.
Am I on borrowed time?
I believe so. Hope you have a backup.
My computer is under warranty. Do you think Apple will replace the hard drive?
If under warranty & determined to be faulty, your hard drive will be replaced. Make an appointment at an Apple store.

External Hard Drive Disk Utility Can't Repair the Disk

Hi,
I have a Seagate 1 TB Backup Plus Drive which was working perfectly fine until I plugged it into a USB hub. It detected it while in the hub and I was able to get files off of it, but when I ejected it from the hub and put it back into the USB slot on the computer it was not detected by finder. It shows up in the disk utility and I clicked verify and repair and it says:
Verify and Repair volume “Seagate Backup Plus Drive”
Checking file system
Volume repair complete.
Updating boot support partitions for the volume as required.
Disk Utility can’t repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files.
Is there any way to get this to work properly again? Or if not is there a way for me to recover my files on the external hard drive?
Thanks
I have a Macbook PRO late 2011 running OS X Mavericks.

Use a more powerful utility such as DiskWarrior, or a product such as those listed here.
(108710)

How to repair corrupted Macbook Pro hard disk when I don't have a startup disc provided by Apple

So my MBP was really making horrible clicking noise and I figured out that my start up Lion OSX disk partition is corrupted.
I have three partitions. One for Lion OS X, another for Documents and another for Movies and Downloads. When I run disk utility and verify other two partitions(documents and movies/downloads), they appear to be okay but when I do the same with Lion OS X then it says:
The volume Lion OS X was found corrupt and needs to be repaired.
Error: This disk needs to be repaired....then use Disk Utility to repair this disk.
Is my hard drive gonna die soon? Or will it be okay if I just format my 500gb hard drive completely and install the fresh copy of Lion OS X again? I don't have a recovery disc or what so ever provided by Apple anymore. I have a DMG installation file of Lion OS X and a USB flash drive(4 GB approx). How can I repair the disk partition without the recovery start up disc?
Please help me, I am really worried.

Hmmm idk if it's the clicking noise or not but it is making a noise of course. Sounds like hmmm few old desktops that makes weird loud noise for the first 20 seconds they boot up.
I am still unsure if it needs to be changed because the other two volumes appear to be okay. Why only this one? I have already saved all of my data in an external hard drive but it's weird how my 10 year old desktop is running on a same hard drive and my 3 years old 3000$ laptop had it's optical drive replaced, dead pixels, trackpad problem and now hard drive when I take care of my laptops like my baby and more over I don't even travel with it, it is always sitting on my desk like a desktop.

Problems with hard disk, but it won't repair

Hi,
My MacBook Pro has gradually become slow, and it crashes occasionally, especially when multitasking. I verified my hard disk with the Disk Utility, and it told me the following:
Verifying volume “Macintosh HD”
Checking HFS Plus volume.
Checking Extents Overflow file.
Checking Catalog file.
Incorrect block count for file Temp File
(It should be 917 instead of 0)
Incorrect number of thread records
Checking multi-linked files.
Checking Catalog hierarchy.
Checking Extended Attributes file.
Checking volume bitmap.
Volume Bit Map needs minor repair
Checking volume information.
The volume Macintosh HD needs to be repaired.
Error: The underlying task reported failure on exit
1 HFS volume checked
Volume needs repair
However, in a pop-up it then says the following:
First Aid failed
Disk Utility stopped verifying "Macintosh HD" because the following error was encountered:
The underlying task reported failure on exit.
Any idea what could be wrong and how I could fix it? I find it a bit disconcerting that my Mac crashes. It's not supposed to do that!

In order to repair a startup volume you must boot from another disk. Try 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 shutdown the computer for a couple of minutes and then restart normally.
If DU reports errors it cannot fix, then you will need Disk Warrior (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.

I have received an error message from an attached USB hard drive (not Time Capsule) stating "Disk Name" cannot be repaired. Back up your data and reformat. I opened the Disk Utility in an attempt to repair the disk but am advised that the disk "could not

I have received an error message relating to an attached USB hard drive (not a back up and not Time Capsule) advising that "disk name" cannot be repaired. Back up your data and reformat. When I attempted to verify the disk with Disk Utility, I was advised that the disk could not be unmounted. What can I do to repair the disk?
Write Status is Read/Write
SMART Status is Not Supported
Partition Map Scheme is Master Boot Record
HELP!
timothy7712

You need something stronger, such as DiskWarrior, TechTools Pro, or Data Rescue.

Disk Utility Unable to Repair External FireWire Hard Disk

Hello all.
This is the External FireWire Hard Disk that has been giving me problems for days, it is a Backup/Clone Disk of my sis's Mac mini Core Duo, and may explain why it was so hard and took so much pain to copy some of the data out, at times it failed to mount, and I manage to rescue some data after using Disk Warrior, but Disk Warrior was also unable to replace it with a new directory.
Anyway, so I (was able to) mount the hard disk, and I was successful in erase and reformating it.
But when I (try to) repair it with Disk Utility's First Aid, this report is what I get:
(The usual 'Checking...' text lines, text in BOLD indicates RED colour text)
Checking HFS Plus volume
Checking Extents Overflow file
Checking Catalog file
Checking Catalog hierarchy
Checking volume bitmap
Volume Bit Map needs minor repair
Checking volume information
The volume Untitled could not be repaired after 3 attempts
Error: The underlying task reported failure on exit
1 HFS volume checked
1 volume could not be repaired because of an error
Repair attempted on 1 volume
1 volume could not be repaired
Then a window dropped down from the top says:
First Aid failed
Disk Utility stopped repairing "Untitled" because the following error was encountered:
The underlying task reported failure on exit
(OK Button)
I guess this hard disk is really a gone case?? I am quite OK just to replace it with a brand new one... maybe all the trouble I had in the beginning is because I may already have a faulty backup drive to begin with???
Thanks and cheers

Hi Kappy,
I knew there was something about "not mixing" PPC and Intel versions of dealing with the external drive.
The drive was originally prepared on an Intel Mac mini Core Duo. But it should also mount normally on a PPC mac as an external hard drive right?
Here's the sequence of events:
1. Tried to boot from the Back Up/Clone Drive of the Mac mini Core Duo, through my MacBook Core 2 Duo, but failed to boot up
I had to shut down the MacBook (prolonged Bluescreen)
2. When I reboot the MacBook, and tried to mount the ext drive as normal, nothing happens, I knew something was wrong
3. Able to reach the vendor, use the Mac mini again to erase and reformat the drive, then check with DU, everything is OK
Clone with SuperDuper
After that check again with DU, not everything is alright, there are errors.
4. Brought the drive home, try to mount on my iMac G5, nothing happens.
I did a check on this forum, and the reply was that I should be able to use Disk Warrior 4 (Universal) on a PPC to fix an Intel-based ext drive. I was very specific and detail in my post/question
5. So anyway, I have no other option, I ran Disk Warrior 4 from my PPC iMac G5 and scan the ext drive, trying to fix it.
It reported the drive is too damaged to be replace with a new Directory, but gave me a Preview Mode. I use this to copy some data out.
But not sure if the data is OK or not.
6. After that, I was able to mount the drive in my iMac G5, so I just use DU and erase and reformat the drive, with Zero Data
7. Ran DU again, and that's where I am now, at the very first post, getting error messages that I cannot fix the drive
Thanks and cheers

My hard disk is damaged and i have no external hard drive, and i was wondering, if i sent my computer to Apple, would they back up my files for me before repairing it?

My hard disk has been damaged for about 4 months now. When I ran the disk repair under disk utility, it told me to back my files and send it in for repairs. My problem is that I had a external hard drive, but I lost it, so I obviously can't back up my files. Also I tried using other external hard drives and that didn't work, pretty sure it was because they were not formatted for a mac. So my question is that if I send my computer to Apple, for repair, that would they back up my files there before repairing my computer. It could be a dumb question but at least I asked. Also my mouse pad no longer works. The "clickability" of it stopped about 3 months or so after getting the computer and just around last Christmas the mouse would not click anymore at all, it would move if one put there fingers on the mousepad but it would not "touch click" anymore. So yeah, help!
And the OS X was still a snow leopard, not sure the number of the OS.

Can't you just get another external drive, format it for Mac OS Extended (Journaled) and backup some if not all of your files? Apple's not in the data recovery business. You should have maintained a backup and now it might be too late. Your best bet would probably be just to call it a loss and buy both an internal, to put in your machine, and an external, for backup purposes. You can boot from your installer disc, format the 'new' internal and begin restoring your apps at least.
I'll never understand why some people don't have backups. Drives fail. It's best to have redundant backups so that all three or four drives don't all fail at once.
Sheesh - I know that I'm not helping your problem but maybe now you've learned your lesson and others will as well.
Clinton

Macbook pro won't boot and when I tried to back up the hard drive I got "disk utility can't repair this disk backup as many of your files as possible"

My macbook pro froze and initially would not even recognize the power chord. Now it charges, but will not load up. I opened in in disk utility to try and back it up so that I could take it to apple to have it fixed but I got the message that said "disk utility can't repair this disk backup as many of your files as possible". How do I back up the files???

Nichelle215,
you can try the method described on this Apple page, in the “Instructions for backing up to an external hard disk via Disk Utility” section. (You can skip step 6, since you already know that your disk is irreparable.) Note, however, that this method is not guaranteed to work. Once you get your disk straightened out, you might consider purchasing an external hard disk for use as a Time Machine backup destination, so that a similar problem in the future won’t wipe out the only copy of your files.

Repairing Hard Disk

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