Mon Jul 06, 2009 6:43 pm
I can confirm that Starwind works with CSV. As far as I know, there are no special requirements for CSV storage beyond the normal cluster requirements (e.g. iSCSI must support persistent reservations, which Starwind does.)
I've tested a cluster of Windows 2008 R2 (Release Candidate) Hyper-V nodes using Starwind 4.0 for storage, running on top of Windows 2008. I can live migrate VMs from node to node etc. It works beautifully. Now instead of one LUN per VM/VHD, you really only need to do one LUN per RAID volume.
There is a big hurdle however, before you can run this is in production. Backup. As far as I know, there's no way to do a reliable backup of a running VM when its VHDs are stored in a CSV. To do so apparently needs special support for new functions in VSS, and no backup product (inlcuding the free WIndows Server Backup and Microsoft DPM 2007 SP1) currently supports this. There's no ETA for DPM v3, which will have support, but hopefully there will at least be a beta available when 2008 R2 RTM's in October. (That's my hope, it's not based on any statement from Microsoft!).