Running NW 7.5.2 with Data Domain DD880 in VTL mode. When a backup with several 
clients kicks off, NW may want to mount 12 or more tapes (tape sessions are set 
to 1 per data domain). We get several of the red arrows with a message like 
this: "Device `rd=nt2legatok4.emn.com:\\.\Tape0' is either disabled or in 
service mode." These are not true as the tape drive is not disabled or in 
service mode, and if you look further you'll see that the volume it is trying 
to load is already mounted on another drive and may even be writing at the 
time. I suspect it has something to do with sessions being set to 1, but I've 
logged an SR with EMC and they have not yet suggested that. Updating the tape 
drivers (this is windows 2003 for the server and win2008 for the storage nodes) 
has not helped. 

Is anyone else running NW with DD880 VTL, and is anyone else seeing these kinds 
of messages.? 

Thanks

Robert D Mumford

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