Slow tape to tape duplicates
Backup Exec 2010 R3 SP3 on a Windows 2008 Standard R2 64bit server.
IBM TS3200 Tape Library with LTO5 tape drives.
We run weekly backups to tape, and than duplicate those tapes to send to a remote site.
I'm used to get a very good jobrate on the tape-to-tape duplicates - 5,000MB/min - 7,500MB/min.
All of a sudden I'm starting to get slow job rates of 3,000MB/min - 5,000MB/min.
No known changes I recall during the last week or two.
What could be the reason?