Verify disk missing threads repair failed?

I am sorry I do not know where to post this. I have just repaired my permissions and verified my hard disk the the result was as below:
2010-01-19 09:56:10 +0900: Disk Utility started.
2010-01-19 09:56:15 +0900: Repairing permissions for “Mackintosh HD”
2010-01-19 09:59:36 +0900: Permissions differ on "usr/share/derby", should be drwxr-xr-x , they are lrwxr-xr-x .
2010-01-19 09:59:36 +0900: Repaired "usr/share/derby".
2010-01-19 09:59:56 +0900: Warning: SUID file "System/Library/CoreServices/RemoteManagement/ARDAgent.app/Contents/MacOS/ARDAg ent" has been modified and will not be repaired.
2010-01-19 10:00:52 +0900:
2010-01-19 10:00:52 +0900: Permissions repair complete
2010-01-19 10:00:52 +0900:
2010-01-19 10:00:52 +0900:
2010-01-19 10:27:06 +0900: Verifying volume “Mackintosh HD”
2010-01-19 10:27:06 +0900: Starting verification tool:
2010-01-19 10:27:07 +0900: Performing live verification.
2010-01-19 10:27:07 +0900: Checking Journaled HFS Plus volume.
2010-01-19 10:27:07 +0900: Checking extents overflow file.
2010-01-19 10:27:59 +0900: Checking catalog file.
2010-01-19 10:27:59 +0900: Missing thread record (id = 623624)
2010-01-19 10:28:00 +0900: Missing thread record (id = 782860)
2010-01-19 10:28:00 +0900: Incorrect number of thread records
2010-01-19 10:28:00 +0900: Checking multi-linked files.
2010-01-19 10:28:00 +0900: Invalid volume file count
2010-01-19 10:28:00 +0900: (It should be 416768 instead of 416775)
2010-01-19 10:28:00 +0900: Checking extended attributes file.
2010-01-19 10:28:00 +0900: Checking volume bitmap.
2010-01-19 10:28:00 +0900: Checking volume information.
2010-01-19 10:28:00 +0900: The volume Mackintosh HD was found corrupt and needs to be repaired.
2010-01-19 10:28:00 +0900: 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.2010-01-19 10:28:00 +0900:
2010-01-19 10:28:00 +0900: Disk Utility stopped verifying “Mackintosh HD”: 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.
2010-01-19 10:28:00 +0900:
What should I do. Is my hard drive about to fail?? Any comments would be much appreciated

kiwao wrote:
Thanks for your input. The volume has been repaired successfully. How did this happen.
I don't know.
Is it software related.
this is very hard to say. it could be software related but it could be hardware related too.
How can I stop it happening again.
you can't really. verify your hard drive periodically. if this keeps happening you'll need to reformat the drive. if it keeps happening after that it's likely hardware related and you should replace the drive.
This has never happened on any of my other macs. Not on the G4 ibook I am using now nor the imacs I have had!
Thanks again

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