I've run the disk utility verify disk several times and come up with an error (post title) indicating I have a corrupt HD and need to repair. I've rebooted with command R and run disk utility to repair the disk and it says everything is fine. Reboot to normal mode and verify continues to show the error.
Other info says the file system exit code is 8.
Any suggestions whether this is serious?
MacBook Pro (Retina, Mid 2012), OS X Mountain Lion (10.8.2)
Update to my system information is that I'm running Yosemite 10.10.1
If everything is working as expected, I'd ignore it for now. You don't want to create a problem trying to fix something that is working.
I got this as well.
Under Yosemite 10.10.3.
The odd thing is that the disk was OK until I copied data to it, and now
the source disk and the destination disk gets this error 8.
I format the disk, and it is OK, until l try copying the date onto it again,
and them it goes offline and can only be mounted read only, and a
verifiy or repair gives error number 8.
I don't understand how any data I can copy from one disk and put on
another disk can cause the destination disk to get corrupt. Maybe there
is some kind of bug in the directory routines?
I have the same thing as well under 10.10.5
Starting to wonder if no one knows how to fix this.
BTW - I have tried repairing "using the Recovery HD" by rebooting and holding the Command -r... same issue... doesn't work. Help
I think there is some kind of bug in the filesystem code
that cannot be corrected by the filesystem check routines.
When I had a perfectly new disk that was corrupted by
just copying data to it, and it is not caught at write time
but only on trying to read it back it makes the disk
unreadable ... I don't know what else it could be?
I copied the source disk in increments to another disk.
Had to stop, then reboot and try to copy the copy disk
to make sure the bad data or write was on not on it.
Then continue until I got as much as I could off the
original drive. Then, reformat the original drive, and it
works fine? Bug.
I just got this fixed. I have the "fileVault" on. So when I started in "recovery mode" (Command - r) I went through the following steps.
Clicked on the second "Macintosh HD" down on the list in the disk Utility
Up at the top where the "Mount/Unmount" icon is, it said "Unlock"
So I clicked "Unlock"
Then I was able to click "Repair Disk"
This worked and repaired everything. I have no more errors.
I hope this will work for you.
I am using El Capitan and while the menu is a bit different, once I unlocked the disk, I was able to fix the disk. Thanks. The "unlock" was the missing piece.
Invalid volume free block count
