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:

quoted

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, http://smartmontools.sourceforge.net

=== START OF INFORMATION SECTION ===
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.