RE: hot spare disk

["Wilt, Charles" <WiltC@xxxxxxxxxx>]

Perhaps, but don't forget that RAID6 has lower performance when compare to RAID5.

Charles Wilt 
Software Engineer
CINTAS Corporation - IT 92B
513.701.1307

wiltc@xxxxxxxxxx


> -----Original Message-----
> From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-
> bounces@xxxxxxxxxxxx] On Behalf Of Jones, John (US)
> Sent: Tuesday, April 29, 2008 9:30 AM
> To: Midrange Systems Technical Discussion
> Subject: RE: hot spare disk
>
> If you're going to have the 'spare' drive spinning anyway and your
> controller supports RAID6, go that route and gain that extra level of
> protection.
>
> After all, in RAID5 if you have a second drive fail between the time a
> first drive fails & parity is rebuilt using the spare you crash.  Under
> RAID6 with two failures you drop to unprotected but stay up.
>
> The only thing having a warm spare does for a RAID5 set is save you the
> trip into the data center to plug the drive in.  Well, it also wastes
> electricity.


This e-mail transmission contains information that is intended to be confidential and privileged.  If you receive this e-mail and you are not a named addressee you are hereby notified that you are not authorized to read, print, retain, copy or disseminate this communication without the consent of the sender and that doing so is prohibited and may be unlawful.  Please reply to the message immediately by informing the sender that the message was misdirected.  After replying, please delete and otherwise erase it and any attachments from your computer system.  Your assistance in correcting this error is appreciated.