We are looking for a 20 tb SAS and 10 tb sata disk options for our vmware, Oracle and backup requirements. We have some approved vendor list (which is a complex procurement process) we had considered EMC, NetApp, IBM. Though impressed by NetApp, they were pretty expensive and we didnt feel the need for their unified storage for the moment. Our global teams had a bad rapport with EMC and so they were out as well. So we've come down to these choices.
One quick question. Nexsan and HP pretty much boast about combining SSD/SAS and SATA disks in the same system (HP P2000 doesnt do SSD). Could you help me understand if this is a good practice? Based on my limited knowledge, its always good to create raid groups for similar disk types. How can creating a raid group with SAS and SSD disks be helpful in terms of performance?
Thanks for your patience.