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GalileoSeven

macrumors 6502a
Original poster
Jan 3, 2015
614
842
Hey all, I've got a 3.0GB Seagate External Hard Drive that went belly up this weekend. Have never gotten any error messages - the thing just suddenly stopped showing up in the finder window. (this thing has always sat stationary with no jostling of the power or USB cords at all)

Went in to disk utility, tried to perform first aid and that didn't work

Catalog file entry not found for extent
The volume could not be verified completely
File system check exit code is 8.
Restoring the original state found as unmounted.
File system verify or repair failed.

Got the same results when I booted into recovery mode, went in to disk utility and ran first aid again.

I tried verifying the disk in terminal and got the following

Started partition map verification on disk6
Checking prerequisites
Checking the partition list
Problems were found with the partition map which might prevent booting
Error: -69770: Partition map check failed because no slices were found


Nothing will work and I'm pretty sure this disk is on its way out, if not DOA already. I did utilize "Disk Drill" and was able to recover some files on over to a new external drive. Disk Drill organized them into three folders, Reconstructed Files, Found Files and Labeled Files.

With the latter two (just over 1 TB and 600 GB respectively), picture, video and audio files still show up and can be accessed/played - not sure what all is there though, going to sort through it later. The former however (Reconstructed Files), looks to contain everything in the same relative directory structure (i.e. the list of folders and the filenames of everything inside are the same), but for some reason cannot be accessed (i.e. jpgs/.NEFs (Nikon image files) won't show up in Preview or Photoshop, can't play mp3 or mp4 files in iTunes, VLC or QuickTime)

I've read through a few similar threads and have tried other solutions, but am at a loss. About the only thing I haven't tried is pulling my old Mac Mini out of the closet and hooking the drive up (though given the above, I doubt that would work)

Some of my photos can be recovered from what I've seen and I can cobble my music/movie/TV collection back from the various backups and other sources I have sitting around, so it's not exactly a disaster, but more of a gigantic PITA.

Does the Seagate sound DOA then or is there hope for possibly recovering more?

(is definitely motivation for getting a more coherent 'backup-of-backups' plan going)
 
What partition table was used? GUID or MBR?
If it's just the partition map being broken, you might be able to fix on another one via FDISK or GDISK. Perhaps if the partition map sector is ****ed you can allign the sectors differently and get the drive functional again.
 
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I've seen that same error but it was on an APFS drive. Is the drive formatted as HFS+ or APFS?

I suggest you boot from Recovery Drive and run Disk Utility on the drive. Normally, you can repair an external drive using Disk Utility, but it's worth a shot to try running from Recovery Drive.

Another possibility would be to use CCC or SuperDuper! To try cloning the drive. I would get as much data off the drive as possible.

DiskWarrior can work miracles on a drive. I've used it on clients drives and was able to repair the drive.
 
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