Re: 3TB drives failure rate (summary)

[Phil Turmel <philip@turmel.org>]

On 10/30/2012 07:54 PM, Rainer Fügenstein wrote:
> 
> tnx for your input; apart from the detailed discussion the topic may
> be summarised like this:
> 
> - better buy WD red drives next time (will do!)
> 
> - other manufacturers drives fail too, not only a WD issue
> 
> - drives from one (bad) batch are more likely to fail
> 
> current status:
> 
> the raid5 assembled of just 3 WD 3TB green drives works fine so far,
> even under load. no bad sectors so far (knocking on wood). will extend
> it to 4 drives as soon as the replacement drive arrives.
> 
> the drives are installed in the same chassis and bays as all the
> previous drives, therefore it is unlikely that the failures were
> caused by overheating/vibrations etc.
> 
> never had any (serious) problems with 750GB and 1.5TB WD green drives
> before.

I strongly encourage you to run "smartctl -l scterc /dev/sdX" for each
of your drives.  For any drive that warns that it doesn't support SCT
ERC, set the controller device timeout to 180 like so:

echo 180 >/sys/block/sdX/device/timeout

If the report says read or write ERC is disabled, run "smartctl -l
scterc,70,70 /dev/sdX" to set it to 7.0 seconds.

You then set up a boot-time script to do these adjustments at every restart.

Phil
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