I'm getting "An error was detected on device \Device\Harddisk0\DR0 during a paging operation." Event ID 51 on some virtual machines. These machines are Windows 2000 SP4 Server and Windows 2003 SP2,. using Buslogic and LSI scsi controllers.
All VMs have the Disk timeout setting set to 60 seconds as recommended by a VMware KB.
All VMs are stored on single LUNs/single volumes using Hardware iSCSI QLogic 4052 cards, connected to dedicated storage VLAN, connected to NetApp 3040, Fibre Channel discs, all LUNs/volumes are in a single aggreate.
I'm not seeing any timeout issues with VMs or Physical machines connected to our iSCSI storage, or any errors in logs on ESX, timeout changes have been made to iSCSI tools installed on servers. We are running ESX 3.0.2 Builds 77863 and 95415.
Any ideas, where to start before I log calls to VMware and NetApp at the same time.