> While RAID deals with hard drive failures, I've always thought there
> are lots of other things that can go wrong, so I like to just have a
> backup server. Another concept I find interesting is the "redundant
> array of inexpensive servers." This allows a system to continue running
> on the failure of a server, no matter what the cause was. Another
> method of handling large arrays of drives that I've always found
> interesting, but never used, is ATAoE. I've seen a lot of ads for
> Coraid and always found the idea interesting.

One disk array system I worked on used n+1 PC style power supplies that had=
 extra circuitry in them so they could be hot swapped without disrupting th=
e 5V and 12V busses in the system.


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