I have a SQL Server 2008 cluster connected by iSCSI to my SAN. It connects via a 1Gb switch. The SAN I am using is an Equallogic PS4000, with a single RAID10 LUN. The disks are SAS 15k.
Neither the switch nor the SAN have 10GbE capability, but I was considering an upgrade.
Would an upgrade to a 10GbE switch and SAN make much difference, or would I be constrained by Disk I/O regardless.