I have set up two DS4100 SAN linked with fiberchannel. I've set up multiple RAID configurations: RAID10 spanning 4 disks in each SAN, a few RAID5's. (hardware RAID handled by DS4100)
I'm running 32-bit Windows 2008 Datacenter edition. I've connected server to SAN through fibre channel. I've disabled "write caching with mirroring".
Now whatever I do I can't seem to get more than 40MB/s performance out of the SAN storage. I would expect more of 4 striped disks (RAID10, 8 total) or 6 disks in RAID5.
What performance can I expect from 6x400GB SATA-disks in RAID5?
Any idea what I can check to find why it is so slow?