I am at about my wits end with a problem I have attempted to diagose, so far unsuccessfully, with an IBM System X3650 server. I am running ESXI 4.0 on the machine and am getting constant "Lost access for volume due to connectivity issues" errors in the event log. It seems when ever there are steady writes on any of the datastores, I get these errors. I notice it primarily when I am doing a backup of the domain controller (SBS2003 machine on Datastore1) with StorageCraft ShadowProtect which is installed on that machine. When I begin to see the errors below, I also simultaneously see disk errors in the event log of the SBS2003 server and almost every time the error: "Timeout (30000 milliseconds) waiting for a transaction response from the NtFrs service". I am working with IBM and VMware engineers and both have enamined logs of the Hardware and ESXI but so far no results. Yesterday we replaced the system board which has the RAID controller on it (IBM/Adaptec 8K controller) but it did not help.
Any feedback would be greatly appreciated!!