Hi,

How many savesets are there in your 375GB backup ?

The server parallelism sets a limit on the number of concurrent savesets
occurring at any given point - so if you have a parallelism value of 16,
your backup server can write up to 16 different savesets continuously.

Assuming that you have enough savesets to fill this capacity, and that all
8 of your drives are used for the backup, you might only be writing 2
savesets per drive.

The other factor to consider here is the target sessions value for each of
your drives.  I have found that my DLT7000 drives yield the best streaming
rate when they are writing 6 savesets each - having 2 of these drives, I
have set the server parallelism to a value of 12, and the target sessions
for each drive to a value of 6.

The point is, it doesn't matter how large you set the target sessions
parameter for each of your drives - if your server parallelism isn't large
enough to use those target sessions then your backups may be running at
less than optimum speed.

Regards,

Matthew

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