Disk utility gives "Error: Partition map repair failed while adjusting structures to fit current whole disk size"

I am getting the following error when running Disk Utility (under ML) on an exteral USB hard drive:

Error: Partition map repair failed while adjusting structures to fit current whole disk size.

I get thsi when I ask Disk Utility to "Repair Disk" at the top level of the disk hierarchy (i.e. not on one of the partitions within the disk but on the disk itself). I was not getting this error with Lion on the same disk before I upgraded from Lion to ML.

It seems like a bug in ML. I found websites where they suggest that you just run Lion's Disk Utility and it will show the disk to be fine.

Any thoughts?

MacBook Pro, OS X Mountain Lion

Posted on Aug 18, 2012 4:31 AM

99 replies

Feb 8, 2013 8:30 PM in response to Mike Stand

I agree, we all should file a report. I too am having troubles with a 3TB Seagate. Still have not resolved the problem, even with DiskWarrior.

Jonibean

Level 1

5 points

Mar 14, 2013 9:38 AM in response to nycmacmini

I am having the same problem with an Iomega Go Drive. In addition, it keeps changing to 'read only' and the permissions settings are greyed out so I can't do anything.

Mar 14, 2013 11:54 PM in response to Rumboogy22

Finally Fixed today with Mac OS X 10.8.3 Update!!!!!

(Disk Utility Version 13)

Uyzer

Level 1

4 points

Mar 15, 2013 8:31 AM in response to nycmacmini

10.8.3 fixed this problem for me too. I also have the Seagate 3TB GoFlex and encountered this issue just today. So awesome that the ML update came out when it did.

Mar 15, 2013 7:23 PM in response to Uyzer

Seagate 3TB Backup Plus here. 10.8.3 fixed it!

matehat

Level 1

0 points

Mar 15, 2013 7:37 PM in response to Rumboogy22

With 10.8.3 installed, I created a new partition layout from scratch with the disk utility, and everything works like a charm!

revDAVE

Level 2

350 points

Mar 30, 2013 1:13 PM in response to zinnerear

10.8.3 fixed the problem for me also with a seagate backup plus

Dec 8, 2013 5:48 AM in response to JC-Avila

Having same exact issue with my Seagate 3TB

I am using it for both Time Machine Backups and external storage.

Dec 8, 2013 9:46 PM in response to revDAVE

Same here...Seagate 3TB backup+ desktop was fixed by a ML patch 10-11 months ago. No issues in Mavericks so far.

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Disk utility gives "Error: Partition map repair failed while adjusting structures to fit current whole disk size"