linux-kernel - Re: 3.12-rc5 and overwritten partition table

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Message-ID: <20131029222002.GD12814@quack.suse.cz>
Date:	Tue, 29 Oct 2013 23:20:02 +0100
From:	Jan Kara <jack@...e.cz>
To:	John Twideldum <twideldums_throwaway@....at>
Cc:	Jan Kara <jack@...e.cz>, linux-kernel@...r.kernel.org
Subject: Re: 3.12-rc5 and overwritten partition table - by powertop?

On Tue 29-10-13 22:58:40, John Twideldum wrote:
> >> The first ~170kb of /dev/sda got blown away with what seems to be a logging output
> >> by Powertop, when I was playing with the tuneables.
> >
> >So did you log the output to some file? I'm just trying to understand how
> >it could get onto your disk in the first place...
> 
> Attached a dump of the first 1Mb of the disk, HTH.
> It looks like a powertop log?
> (I have powertop 2.4)
  Yes, likely. But it is strange the corruption doesn't even end at any
sensible boundary (data ends at offset 0x27b53). Shrug...

> meanwhile, testdisk running in all variations recovered enough clues to
> guess the partitions correctly - the data is fine :-)
  Good.

								Honza
-- 
Jan Kara <jack@...e.cz>
SUSE Labs, CR
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