Hi Folks !
I have a Sun V480 Media Server connected to a IBM LTO 3584 library with 6 
tape drives.
My unix backups are running fast enough.
But Windows clients backups are running slow. The strange thing is when I 
run one job, it runs faster. But as I start more Windows backup jobs, the 
speed of induvidual backups reduce gradually. If I run 4 jobs 
simultaneously, each job runs at 1/4th of its original backup speed. The 
unix jobs are running just fine. The Windows clients are in a different 
subnet but there are no routers in between. When I start killing the backup 
jobs, the active jobs gradually speed up.

6 drives are connected to 3 SCSI controllers.

My Buffer parameters are,
NET_BUFFER_SZ = 256 KB
SIZE_DATA_BUFFERS = 64 KB
NUMBER_DATA_BUFFERS = 64

Any idea ???

Thanks.

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