NetApp requires setting a timeout value of 190 seconds for all VMware data stores on their filers to handle “long fabric or storage-side I/O interruptions”; this is done as follows on FreeBSD: This can be set permanently in /etc/sysctl.conf: Elsewhere, I have seen a recommendation for FreeBSD on ESX that kern.cam.da.retry_count be set to 120.
Links for September 21, 2009: Virtual Geek: A Multivendor Post on using iSCSI with VMware vSphere – "One of the most popular posts we’ve ever done was the original “A ‘Multivendor Post’ to help our mutual iSCSI customers using VMware” that focused on the operation of the software iSCSI initiator in ESX 3.5 with several [...]
Links for June 29, 2009: VMware Communities: Change iscsi lun to fcp – VMware communities post on moving NetApp iSCSI VMFS LUN to FCP.