I am looking to build a very high density storage pool: a rack containing a c7000 chassis with 6 MDS600 arrays with the newly announced Seagate 3TB SAS drives will give me 1260TB with sufficient CPU horsepower. I am trying to decide how to configure the RAID pools. My initial thought is to create many 14-drive RAID6 pools (assigning each blade multiple pools).
Can I configure the system so that RAID pools span multiple MDS600 arrays? What is the maximum I/O that I can expect between the c7000 and the drive arrays and what options do I need to acquire to achieve that performance?
Because of the high density, I had to use SAS/SATA over FC drives (we've been successful in acquiring drive caddies and racking our own drives in HP gear to save quite a bit of money). It appears that the MDS600 is the highest density array that HP sells. (I am not tied to HP, but they seem to make good kit.) I'm still reading up on the configuration of the SAS switches. I'll be using the BL460c with dual 5675.
The OS will be CentOS (5 or 6) with our application running on the blades. My initial assumption is to give each blade a few pools (still kicking around whether to use larger RAID-6 pools, smaller RAID-5 pools, and how many spares) to handle RAID rebuild times.