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Date:	Wed, 17 Aug 2011 19:48:07 -0400
To:	Thomas Backlund <>
Cc:	Andreas Dilger <>,
	"" <>,
	"" <>
Subject: Re: INFO: task jbd2/dm-0-8:3993 blocked for more than 120 seconds

On Thu, 18 Aug 2011 00:08:53 +0300, Thomas Backlund said:
> Andreas Dilger skrev 17.8.2011 17:35:

> > This is a problem with your disk hardware.

> Are you sure?
> I get nothing from smart, even after I had executed the long test...

SMART is nice, but it isn't guaranteed.  In particular, you need to
double-check that what you think it's testing in a "long" test is what
it actually did...

> # smartctl -a /dev/sda
> smartctl 5.39.1 2010-01-28 r3054 [x86_64-mandriva-linux-gnu] (local build)
> Copyright (C) 2002-10 by Bruce Allen,
> Device Model:     WDC WD1002FAEX-00Z3A0
> Serial Number:    WD-WCATR3168879
> Firmware Version: 05.01D05
> User Capacity:    1,000,204,886,016 bytes

So we're looking at a terabyte of disk...

> Selective self-test flags (0x0):
>    After scanning selected spans, do NOT read-scan remainder of disk.

And it's *NOT* doing a read-scan of the entire terabyte.

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