Error: -69845: File system verify or repair failed Underlying error: 8: POSIX reports: Exec format error

I've received the same message.

I've just installed a new Crucial SSD MX100 to my old MacBook Pro 3,1 (2007) with latest version of Yosemite. All seems ok, system works very well and very fast, but after install Onyx I've received the same message:

Error: -69845: File system verify or repair failed

Underlying error: 8: POSIX reports: Exec format error

Is there something bad with my new SSD or just Onyx is not good cheking SSD drives?

Well, I have solved running a "fsck -fy" from single user mode.

Read this:

http://osxdaily.com/2013/08/07/how-to-repair-a-mac-disk-with-fsck-from-single-us er-mode/

Hi, I too am having this issue with an external drive after installing a new internal drive. The external drive can be identified using the diskutil list command from terminal but when I try to verify or repair the volume both in Disk Utility and from terminal I get the following message:

The volume could not be verified completely

File system check exit code is 8

Updating boot support partitions for the volume as required

Error: -69845: File system verify or repair failed

Underlying error: 8: POSIX reports: Exec format error

I am unable to fix the disk from single user mode since it is an external drive and not a bootable disk. Is there any other way that this disk can be repaired?

Have you tried Applications/Utilities/Disk Utility Repair Disk?

Yes, the drive shows up in disk utility but I am unable to mount or repair the volume. When I click Repair Disk on the volume I get the same error message:

"The volume could not be verified completely

File system check exit code is 8

Updating boot support partitions for the volume as required"

I have a similar problem as well. But my situation is reinstalling OS Yosemite, through online recovery or USB bootable OS Installer, it didn't work. Took a long time for it to install and the similar problem occured. Code=-69845. When I try to repair my disk, it showed file check exit code is 8. What can I do now? Any solution yet?

Have you found a solution? I'm having the same problem. I've tried four different SSDs, two different SATA cables, two different Macs, tried installing internally and externally, and have tried Yosemite and Lion. No idea what's causing this, and I can't think of anything else.

Some problem here. Replaced HDD with a SSD, and now stuck with the same issue..

Come posso riparare il disco? Grazie