Late last year we began formally migrating over to Windows 2008, specifically addressing single points of failure. In our production data center we’ve recently deployed a fibre channel SAN, whereas Windows 2008 clusters have played very nicely, enabling our SQL instances to benefit from a more robust storage subsystem.
Tonight however, I began migrating a slightly older system, HP DL560s with an HP Modular Storage Array 500. After a brief six hours, tracking down updated drivers, firmware and iLOs + controller and array config utilities, I happen to find out Windows 2008 has dropped support for Parallel SCSI, in support for iSCSI, SAS and of course fibre channel. More info can be found here: http://support.microsoft.com/default.aspx/kb/947710
Therefore, if you’ve got legacy Direct Attached Storage (DAS) SCSI Arrays in use, they WILL NOT migrate to Windows 2008 clusters! So now I must revert back to W2k3 R2 SP2 – which still provides support for Parallel SCSI. Too bad, have really enjoyed my experience with W2K8 boxes of late, but it looks like W2K3 will have to live on for a while longer..