I have been contracted by a client to resolve an issue they are currently experiencing with respect to their NetApp and their VMWare Infrastructure.
In the clients current configuration, they use VMWare running on IBM ESX Hardware. The VMWare hardware communicates in a specific VLAN to the NetAPP. The client uses iSCSI to connect from their VMWare Infrastructure to the NetApp to talk to their VMDK's. They also I beleive are using NFS from the VMWare Infrastructure to the NetApp for storage.
The problem that the client is experiencing is that sporadically they have a VM display a Windows error message indicating "No Disk" (picture of error attached to case).
This does not happen every day, but is happening from time to time. The client has this as their #1 IT priority currently to have this resolved.
I have used a sniffer to sniff the VLAN where the transactions occur between the VMWare Infrastructure and the NetApp. I see what I would call very clean IP communications between the VMWare and the NetApp (less than 1% retransmissions or any other TCP errors.).
I am hoping that perhaps some of you may have seen this behavior before, and may be able to provide suggestions toward resolution.
Thanks for any input.