What is the likelyhood of OF supporting RAID4 using the underlying software RAID functionality ?
 
The reason I ask is that in a nearline disk-to-disk target system, RAID4 will allow drives not in use to be powered-down so that only the current active drive and the parity drive are active.  In the event of a parity drive failure, of course all other disks will require spinning up, which may be a problem with a system not designed as a VTL target.   Most systems use a mirror set to store the parity information to get around this limit.
 
It would be a very nice option for those using OF in a home setting or those in an enterprise setting with extreme power and heating constraints.
 
Regardless, what's your guys thoughts on this?
 
Thanks,
 
-=dave
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