[lug] how to repair GPT

Steve A Hart shart at colorado.edu
Wed Apr 27 12:00:04 MDT 2011

Hello all,

We had a power outage this past weekend and of course my backup server 
went down (because I'm the idiot who has not gotten around to getting a 
UPS for it yet).  Anyway, my 7TB raid starting showing I/O errors so I 
unmounted it.

Disk /dev/sdd: 7494.2 GB, 7494231392256 bytes
255 heads, 63 sectors/track, 911121 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

    Device Boot      Start         End      Blocks   Id  System
/dev/sdd1               1      267350  2147483647+  ee  GPT

Now it refuses to mount again and fsck freaks as expected.  I'm not 
fully experienced with GPT and would appreciate any advice on how to 
repair/recover this and get the raid mounted and functional.

Since this is the storage area for my backup server, I technically can 
wipe the whole thing and start from scratch but I'd like to avoid that 
if possible.



Steve Hart
Systems Administrator
Colorado Center for Astrodynamics Research
University of Colorado Boulder
shart at colorado.edu

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