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Why have a hot spare disk?

Dan_394
Advisor

Why have a hot spare disk?

Hi,

While creating my raid 6 volume on my 2012sa msa I was presented with the option of having a hot spare disk. Can someone explain to me why I need one? Isn't it just a waste of a disk, when I can just add to an already redundant setup?

Thanks
Dan
2 REPLIES
TTr
Honored Contributor

Re: Why have a hot spare disk?

Raid6 can tolerate two disk failures so you should decide based on how fast you can get a replacement disk if one disk fails.

With raid6 I would tend to not set up a hot spare either but it depends on the whole environment, who is watching the server/storage, how soon they will call for a replacement, how quickly will the replacement be delivered etc.
wobbe
Respected Contributor

Re: Why have a hot spare disk?

I prefer to use the slot for storage and have a spare on the shelf.
One spare with enough capacity that can be used in a lot of servers.
But for unmanaged remote sites it can be very useful having a hot spare.