[Veritas-bu] Exchange snapshot backup "stops " for an hour or more at a

This exchange snapshot backup has been running successfully 980g in 7-9 hours daily for months, to disk or LTO3. It has started to run for 18-20 hours. While watching it I see that it has "stops" at the 160g mark for about 1 hour(as close as I can catch it. Then it starts writing again and today "stopped" at 289g for over an hour(it is still stopped).

The backup normally runs to LTO3 tape, but I tried disk and LTO4 with the same results, it does end eventually. There is nothing in the logs, that I can see.

Other backups/dups/catalog are all running and ending on all 3 media servers, to disk and tape with no issues.

NetBackup 6.5.3 windows x64 sp2 clustered master

3 media servers NetBackup 6.5.3 windows x64 sp2

We added 2 LTO4 drives and upgraded the media servers, drivers, and the tape library and tape drive firmware to get them to work. No other backups seem to be effected.

Any ideas?

Thanks for any ideas.

I have opened a ticket with Symantec waiting for a response.

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[Veritas-bu] Exchange snapshot backup "stops " for an hour or more at a time