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Miserable Throughput

Occasional Visitor

Miserable Throughput

I have a Surestore 2/20(single drive) attached to a Adaptec 29160(Ultra 160)in a Dell Poweredge 6300. Running Backup Exec for NetWare 9.0.

It backs up three servers-one directly attached via the 29160 and two others through the lan. My throughput is perfectly acceptable on the lan attached servers BUT... the directly attached server backs up at 1/3 the speed.

I am averaging 11.9G/hour on the locally attached server and typically get 30-35G per hour on all my other servers that have local tape drives. Furthermore the SureStore is largely idle and only writes to the tape every 5 seconds or so when backing up the directly attached server. Backing up the LAN attached servers it writes almost constantly.

I have tried the integrated SCSI, throttled down the Adaptec to 80MB, changed drivers. I am running out of ideas. Any assistence would be greatly appreciated.
Esteemed Contributor

Re: Miserable Throughput

Hi there.
That looks like you daisychained something
to the same controler as the DLT2/20 ( like disks ).
If yes, that is giving you the headache.
You should not attach anything to the same SCSI controlers as the tape drives.
Pls send some more details.
Alexander M. Ermes
.. and all these memories are going to vanish like tears in the rain! final words from Rutger Hauer in "Blade Runner"