We have some Windows 2008 R2 SP1 guests running on a 3 node cluster where the hosts are ESXi 4.1.0. When heavy IO disk operations occur, there are application problems on the servers, and in the System Event Log on these guests we get Event ID 129 with a Source of LSI_SAS. The data stores are all new EMC VMax Fibre Channel.
This is a bit difficult because I do not administer the vSphere environment, nor the storage. Because I am a Windows admin, I am being asked to approach the problem as an OS one.
I am just wondering if anyone else has seen anything like this, or has an clues as to what is the cause.
I would suggest that this should be a team effort. It is always useful to assemble logs and without the other two log sources there isn't much to go on.
Assuming you are treating this like a Windows issue, why you are asking the question here? What leads you to believe this is a VMware problem? Have you investigated this from the Windows OS side?
This is just one place that I intend to seek help. I said in my post "I am just wondering if anyone else has seen anything like this." It's a server that's running on VMware. If I was getting the same sort of errors on an IBM server, I may look to their Web site for help.