RAID questions (was Re: [TriLUG] Re: Dieing hard drive?)

[Aaron S. Joyner]

Ben Pitzer wrote:

><...>
>my next box for home will have 1+0.  Basically, you'd need two drives of identical size...
><very well reasoned RAID post snipped>
>
>Since it never fails that someone does it, c'mon, hit me with all of the
>wrong information in my email.  Please.
>  
>
*hugs Ben*  Sorry about that earlier.  :)  Generally, it looks good!

Just one clarification...  Did you mean to say that RAID 1+0 requires 4 
drives, as opposed to 2 drives?  You create two mirrored sets of drives, 
and then strip the mirrors.  The result being that it's really quick to 
recreate the mirror on the bottom "layer", should one of those drives 
fail, yet you still get the advantages of two "virtual spindles" to 
write to, so most of the speed benefits of striping.  The only down-side 
of course being that you require 4 separate drives, and you're still 
loosing half the capacity (50% chewed up by the mirroring).

Aaron S. Joyner