and if you have "allow multiple data streams" selected for a policy, 
you'll probably have more than three jobs (and more than one drive used).

(Also, I'm unclear if you have 3 or 9 policies ... this and Ueli's 
responses are assuming you have no more than one policy for each client).

cheers, wayne

Ueli Schweizer wrote, in part,  on 2007-05-14 3:43 AM:
> Assuming the retention level is same for all three jobs NetBackup will
> multiplex all three jobs to one single tape.
>
> Cheers
>
> Ueli Schweizer
>
> -----Original Message-----
> [mailto:veritas-bu-bounces at mailman.eng.auburn.edu] On Behalf Of dy018
>
> Would like to find out somemore info abt multiplexing using netbackup.
>
> Example.
> If i have 3 clients and 3 policies for each client using same storageunit
> and same volume pool.
> My storageunit have 3 drives and i set it to 3 concurrent drive write.
> The policies of the 3 client i set multiplexing to 3.
>
> Question
> If i trigger all 3 policy all at the same time. Does netbackup do 1 or 2
> assuming there are no other backup running from other media servers?
>
> 1. One drive will consolidate all 3 jobs to a single tape media?
>
> 2. One drive will be use for each job triggered, meaning the media server
> will use up all three drives with 3 tape media?
>
> Anyone have any idea?
>