I've had interesting cases where WD Green Drives (specifically WD15EARS, 
WD15EADS) don't necessarily "fail" but suddenly have very slow 
random/read write performance which slows down the rest of the array. 
Removing the drive, and replacing it with a (new) drive usually resolves 
the issue. I have since started to avoid "green" drives due to this issue.

-Peter

On 2012-10-28 5:15 AM, Rainer Fügenstein wrote:
> when trying to upgrade my raid5 with 4 Western digital caviar green
> 3TB drives [WDC WD30EZRX-00MMMB0] (3 brandnew, 1 about 4months old),
> the "old" drive and one of the brand new ones failed with
> unrecoverable read errors and about 70 reallocated sectors each. the
> failures already occured during the initial resync after creating the
> raid.
>
> until now I was very fond of WD caviar green drives, but after this
> 50% failure rate I'm not very eager to restore data from the backup.
>
> what is your experience with 3TB drives, WD and others?
>
> (low power drives appreciated, performance is not an issue)
>
> tnx.
>
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