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Old 09-15-2012, 11:13 PM
Carlos Alberto Lopez Perez
Default Bug#625922: Bug#625922: Failures with ST2000DL003-9VT166

On 15/06/11 22:15, Paul Faure wrote:
> I upgraded my raid disks to 4 ST32000644NS (Seagate Constellation 2TB) and I
> haven't had an issue since.
> I have also moved the cheaper ST2000DL003-9VT166 disks to a Windows XP box
> (in a non raid environment) and haven't seen a problem in days now.
> There are plenty of references online now popping up saying that green disks
> are not designed or supported in a raid environment. Weather or not that's
> because of a physical issue, or a software issue, im not sure.
> Paul

Just a guess: One of the "features" of green drivers is that they park
the heads every few seconds [1] without disk activity. Can this be the
root of the problem?

Perhaps the HDDs are slow responding when they have the heads parked
(which tends to happen too much often than with normal drives) and this
causes this issue.

You can disable this by forcing a one-hour timeout for parking the heads

hdparm -S 242 /dev/sdX

This needs to be done at boot time each time. Perhaps an init.d script
would help.

You can check the SMART attribute 193 of your drives, which tells you
how many times the drive has parked the head in its life. You will see
that this number is far greater on such "green drivers" than on normal

smartctl -a /dev/sdX | grep 193


[1] http://forums.anandtech.com/showthread.php?t=2085685

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