"Fixing Damaged Partition Map" Operation Failed?

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Level 1

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"Fixing Damaged Partition Map" Operation Failed?

Hi everyone-

Until yesterday I've been using an external 2TB Seagate HDD to store large audio-visual files (photos, movies, iTunes library, etc.).

This morning I plugged in the drive and got this message: "The disk you inserted was not readable by this computer." Oh my.

I tried Disk Utility First Aid and got this message: "Fixing damaged partition map. The operation couldn't be completed. (com.apple.DiskManagement error -69874.) Operation failed..."

This sounds very, very bad. I have backed up about two-thirds of the data on the drive but the remaining third has some irreplaceable data (I know, I know). Otherwise, I would erase and restore, but if there is ANY other option available I would be groveling in gratitude!

Many thanks...

Posted on Dec 15, 2016 11:46 AM

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Answer 1

Nov 5, 2017 2:07 AM in response to Backslash-Backslash

Just a quick update: connected the disk to my Windows bootcamp partition (seemed sensible as it's NTFS formatted) and ran the "Scan", which picked up that it needed "Repairing"... Ran that. The Linux based NAS (that the USB drive was backup storage for) now recognises the disk without any partition complaints.

Disk Utility on the mac still isn't happy with it, but that may be due to it being NTFS and connected via Paragon (some kind of interop software for Mac).

It is likely that the original issue may not have been fully eradicated, but it does work. So I'm happy with this sticky plaster for now... Until my backups fail 😀

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Answer 2

Oct 11, 2017 7:29 AM in response to mabryt

Free Trial version will help mabryt: https://www.easeus.com/ad/partition-recovery.htm?gclid=CjwKCAjwgvfOBRB7EiwAeP7eh kUDzHajVmiXp2qcXS23vdbJFFXD5BUKeTgf-iJR0…

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Answer 3

Eric Root

Level 10

685,251 points

Nov 5, 2017 8:25 AM in response to Backslash-Backslash

Just to be safe, I'd get another external drive and copy the files there for a backup.

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Answer 4

Oct 11, 2017 7:21 AM in response to Neomaco

I have exactly the same hardware and issue. Don't really mind anything that'll erase the disk as I was using it as a backup drive. But I would like to fix the partition so it's fully functional again.

Did you find any resolution to this?

Thanks

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Answer 5

Nov 5, 2017 1:45 AM in response to Eric Root

Hi Eric,

Sorry for the delay, I haven't tried this as the Disk Utility already cries when trying to use it. Would flattening my Ext HDD recover the partition map? I'm assuming the approach is to completely clear it to recreate a partition? If this is the best approach I'll go for it. Just didn't want to trash everything for no good reason.

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Answer 6

Nov 5, 2017 2:10 AM in response to PATRICKMELE

Thanks for the reply Patrick, I tried the software, but didn't need to recover any files (as I could still access the disk), it just continually gave me a failure when trying to fix a Damaged Partition Map.

Cheers anyway. 😍

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