[lug] how to repair GPT

Dan Ferris dan at usrsbin.com
Wed Apr 27 12:10:25 MDT 2011

Hey Steve,

What does dmesg show, and what does fsck complain about?  If the 
filesystem is hosed you may get to redo it from scratch anyway.  I don't 
think GPT matters in this case.

I remember what that was 1.2 TB and we thought it was a lot lol!


On 4/27/2011 12:00 PM, Steve A Hart wrote:
> 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.
> Thanks
> Steve

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