What would be a benefit of creating multiple CSV folders?! I thought that whole point of the CSV is to have one big folder. This makes it simple and easy to manage. It wasn’t me who setup Hitachi SAN here but it looks like it has 600GB x 16 SAS 15K hard drives. All hard drives set up in one big (RAID-6) dynamic pool. Why they didn’t setup as RAID-10?! I don’t know… I’m guessing that they chose option for bigger storage then speed. Well, RAID-6 doesn’t give much in write speed gain but 14x read speed is no too bad.
RAID5 is a write pig. RAID6 is even worse... See:
http://gurucollege.net/rants/baarf-or-why-raid5-isnt-safe/
There's a way to make parity RAIDs be fast - layer proper FS on it working with a blocks being close in size (or larger) then parity stripe size is. NetApp does this with WAFL dunno why Hitachi charging a fortune for their storage arrays don't do this (if you see a performance degradation with small writes - they don't).