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"An error occurred while communicating with the remote host" while migrating

vSPhere ESXi 4.1 U1

 

While trying to migrate suspended VMs to a new datastore, I very frequently receive the following error:

 

"An error occurred while communicating with the remote host"

 

Sometimes it does this 10 minutes in and sometimes it does it after 1+ hours.  The remote host keeps chugging along and there are no service interruptions that I can find.  How do I debug this?  I've searched these forums and the Internet in general without finding much to help myself fix this.  I'm currently running on a single-server RAID5 SAN with no failover and am trying ot migrate all my VMs to a dual-node HA RAID10 SAN.  SO far things are going great but the larger VMs keep dying during transit.  I don't have vMotion so I manually suspend the VM and then migrate it.

 

Any help would be appreciated.  I'm not sure if this is a vmware issue or a problem with my new SAN.


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