We have an new HP server with 6 GB of memory and quad core 64-bit processor running Microsoft Hyper-V on windows 2008. We have one Guest OS, which is a Windows 2008 OS running the file server role of server core. In the Guest OS we are running Backup Exec12 agent to backup our data. The data is connected to a HP MSA 2012i SAN via iSCSI. The connection to the SAN is via two nics that are teamed and on a separate VLAN dedicated to the SAN. All switching is gigabit.
The backup server happens to be the host Hyper-V server. The host and the guest each have a dedicated nic that is connected to a server vlan. The host server is running Backup Exec and backs up the guest via the agent.
When the backup runs, we are seeing relatively slow speed and after a period of time the iSCSI Initiator reports that it has lost connection to the disk. A moment later it returns. This behavior seems to repeat itself throughout the backup and often the backup will just fail.
We are hoping someone might be able to clue us into why the iSCSI initiator might be dropping out. We are not seeing any errors on the HP MSA SAN nor on the switching devices. It seems to be a problem within the Hyper-V guest OS.