Hello,

Sorry for my poor english, I try to explain what happen with my DSS system as best as I can :

I got some IO issue on a DSS V6 lite since this WE and I don't know why.
This server has been installed since July 2011, and the only trouble I had was to change the supermicro motherboard after a huge crash in September 2011.
This WE, all the VMs of my customer have frozen, the 3 ESXi servers didn't respond anymore but DSS was up and seem to be fonctionnal, no error has been reported in Admin GUI.
I restarted manualy all ESXi cluster, and VMs one by one, there were some corrupt datas on 2 VM, then I restored some backups and everything was fine.
Except I got lower performance than before this crash.
I open a ticket support to VMWare and provide the logs, They reply it's a storage issue, please, contact your provider.

To setup my DSS I follow the howto by Open-E.
I have :
3 ESXi servers with 6 Gigabits NICs on each system, 4 NICs used like ISCSI initiators for vstorage and vmotion in differents sub LANs.
2 aggregated Cisco SMB switchs
and 1 DSS Raid6 1.6To with 10 VMs inside, 4 Intel Gigabits NICs in ISCSI mode.

Thank you for your help.

Best Regards.