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Hot spare question

A

ashman

Gawd
Joined
Mar 28, 2011
Messages
811
This may be a silly question but is it possible to add a hot spare to an already configured raid 5 array on a perc 6i controller?

Any idea what the rebuild time would be on a 3TB NLS drive on a raid 5 array on a perc 6i?

Thanks
 
Yes it's absolutely possible and don't know off the top of my head; less than 24 hours I believe. Remember this time frame depends on what you configure the rebuild priority as in the controller.
 
From what I can tell it should support it but now I think about it I may do an online raid migration from RAID 5 to RAID 10 when I add the fourth 3TB NLS drive, I just wonder what the impact on the server would be? I would do it over a weekend, but the server is running Veeam to back up VM's, serving files and running a few applications, the only work its doing on the weekend would be Veeam Backups and they are backups to local disk.
 
So after some research I don't think its supported going from RAID 5 to RAID 10 with the H310 so my choices are RAID 5 with a hot spare or RAID 6. Thoughts?
 
Actually it turns out this controller doesn't support RAID 6 so my only options are to blow away the RAID, setup RAID 10, add a new controller, or just add a hot spare. Think I am just going to add a hot spare.
 
RAID 5 with a hot spare and make sure the IDRAC emails you when there is a problem.
 
I always configure the iDrac's to email me, thanks. My only concern with a hot spare, and this happened recently at the same customer, is that lets say a drive is predicted to fail and there is something wrong with another drive, best practice says to check the raid controller logs BEFORE changing out a failed drive or you could wind up with a punctured array as I did. With the hot spare, its going to kick in automatically. The raid controller SHOULD alert me of any problems, but we all know these things don't always work and drive or raid issues can get missed. The old server that had the punctured array was a T310 with a Perc 6i hopefully the H300 is better at detecting issues.
 
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