The volume Macintosh HD was found corrupt and needs to be repaired

Question

My Macbook Air (first gen) is very slow to start up probably because of the volume Macintosh HD is corrupt.

It takes infinity time to startup in normal mode and it takes about 1 hour to start up in safe mode.

In safe mode, I tried to run the "Disk Utility" and to execute "Repair Disk Permission" and "Repair Disk" without success.

Here is the logout (1) of "Disk Utility". I tried to repair disk doing boot from external DVD but it takes infinity time to load programs from dvd (I did wait for about 3 hours without any result). I tried also to mount a USB pen in safe mode to buck-up data without success.

Any idea?

Thanks, Antonio

(1)

Verify permissions for “Macintosh HD”
Warning: SUID file "System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAgent" has been modified and will not be repaired.

Permissions verification complete

Repairing permissions for “Macintosh HD”
Warning: SUID file "System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAgent" has been modified and will not be repaired.

Permissions repair complete

Verifying volume “Macintosh HD”
Performing live verification.
Checking Journaled HFS Plus volume.
Checking extents overflow file.
Checking catalog file.
Checking multi-linked files.
Checking catalog hierarchy.
Checking extended attributes file.
Checking volume bitmap.
Checking volume information.
Invalid volume file count
(It should be 675058 instead of 675059)
Invalid volume directory count
(It should be 189754 instead of 189753)
The volume Macintosh HD was found corrupt and needs to be repaired.
Error: This disk needs to be repaired. Start up your computer with another disk (such as your Mac OS X installation disc), and then use Disk Utility to repair this disk.

Solution

At this point, I think your safest bet is to boot to the Mac OS X installation environment and transfer your information to an external drive, then do a clean installation. If you have a Time Machine backup, you can use it to restore your operating system without the file system corruption.

Get into the installation environment on a MacBook Air, you need either a USB DVD drive or a second computer to host the installation DVD and use Remote Install. Full instructions are listed in Apple's knowledge base under "Reinstalling software using Remote Install Mac OS X".

Comments

[Admin]

I don't think this falls into the category of programming questions

[Hans Kilian]

i think it may be easier to just send it for repair...

[antonjs]

I have a traditional hard disk drive.

[Spiff]

@AntonJs Another way to confirm my bad block theory is to boot off an external drive and then run the free demo of Smart Utility or something else that lets you see SMART stats for a drive, and see if it says you have any bad sectors. Specifically, I think you'll have one or more "Pending" bad sectors. Writing to those sectors moves them from pending to removed/reallocated.

[antonjs]

Hi @Spiff, I solved the problem booting from the Mac OS X Installer DVD and formatting my entire hard drive with "Zero Out Data". Thanks for your useful advices.