My organizations is 125 users and we recently purchased an HP Storageworks iSCSI MSA. Or initial deployement was storage for our file server but we are now looking to use this array for Microsoft Exchange storage (DB and Logs).
Or storage array is currently configured with one virtual disk comprised of 4 disks in RAID 5 array. Our question is the following. In the context of a SAN storage, is it better to make one large array of disks and carve off LUN's from that array? Or is it better to make multiple arrays for specific purposes (e.g. array for Exchange Log files, array for exchange db, array for file server).
It would seem to us that a large array is more efficient and better use of SAN storage; but it also doesn't seem optimized. I am interested on both what is considered best practices and what might be acceptable for an organization our size.