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I opened a case with Dell Equallogic support on this and they said that the error isn't anything to worry about, but is just a warning. From the way it was explained to me is that the backup software initiated a command to create a snapshot, the snapshot is created, backup performed then snapshot is removed. The windows server tries to reconnect to that volume but it doesn't exist thus the error. I'm getting the error with two of our exchange servers.
I get this error every night and wake up to 99+ messages in my inbox stating "Requested target not found". When I log into my server and go to the iScsi Initiator there is a target in reconnecting status. All I have to do is disconnect it and it's fine but it is becoming extremely annoying to have to do this everyday. I use CommVault Simpana 9.0.0 R2. I know the backup software is issuing a command to create the snapshot and then removes it when it's done but why the reconnecting thing with Windows. The thing that is even more frustrating is I opened a ticket with CommVault and they said it's Equallogic's problem and from what I'm seeing here is Equallogic is saying it's the backup software's problem. Does anyone know of any tweaks that can remedy this issue? I have checked and have plenty of snapshot reserve.
BTW - This only happens with my Exchange Database backups. The file system iData Agent does just fine.
Adding this registry key fixed the error message for us.
Basically, what was happening is that commvault opened 4 connections but after the backup only closed 3 of the connections. The Equallogic deleted the snapshot, then windows tried reconnecting the 1 connection it didn't disconnect. The above key changes it so it uses vss instead of the snapshot.
Thanks for the info. Before I make these changes, did you notice and performance issues with how log the backups take to complete after making the change? or any other issues?