My backup is not going through the network. Tape library is attached
directly to server. I'm hoping to get better time here if I use 2 tape
drives at the same time (multi-stream). So, 2 tapes drive = 2 streams
I guess.

As for multiplexing setting, by default it set to 1 which is what I have now.

On 29 April 2010 23:02, Chapman, Scott <Scott.Chapman AT icbc DOT com> wrote:
> If you multistream, you will have a different backup id for each
> individual stream, so you will be able to dup those backup images
> separately, thus continue to use one read drive and one write drive.
>
> Are you sure that writing your backup with 2 drives is going to decrease
> your backup time that much?  You need to confirm where the bottleneck is
> first.  If you find that you are killing the disk on the client, and if
> 2 streams means that you will be reading from 2 separate disks, then
> will your network handle that?  I guess I'm saying, just don't be to
> sold on getting twice the backup speed just because you're now using two
> drives...
>
> HTH.
>
> Scott Chapman
> Senior Technical Specialist
> Storage and Database Administration
> ICBC - Victoria
> Ph:  250.414.7650  Cell:  250.213.9295
>
> -----Original Message-----
> From: veritas-bu-bounces AT mailman.eng.auburn DOT edu
> [mailto:veritas-bu-bounces AT mailman.eng.auburn DOT edu] On Behalf Of Feroz
> Basir
> Sent: Thursday, April 29, 2010 1:53 PM
> To: veritas-bu AT mailman.eng.auburn DOT edu
> Subject: [Veritas-bu] duplicate multi-stream backup tape
>
> Hi,
>
> I have 2 tape drives. Our backup is running too long now and been
> using 2 media tapes (one after another). I'm using bpduplicate to
> duplicate our backup tapes.
>
> Thinking of running our backup in multistream job to utilise 2 tape
> drives at the same time and save backup time. Hoping our backup time
> would be downed by half. My concern is during duplicate process. Do I
> need 4 tape drives in order to run multistream tape that use 2 tapes?
> How does one run duplicate job on multistream backup tapethat use more
> than one tape?
>
> Thanks for your input.
>
> --
> ------------
> regards,
> Feroz Basir
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