I'm running Networker 7.2 on a Linux workstation (RHEL 3, kernel 2.4.29)
with a Qualstar 5433 tape library containing two S-AIT drives.

When I try to clone a saveset on a tape with multiple multiplexed files the
job proceeds at less 1 MB/sec. At this rate it would take about a week to
clone one tape.

If I try to clone one of my archive tapes, where the savesets are not
multiplexed on the tape, the job proceeds at closer to 40MB/sec.

Note that for backups parallelism on the tape devices is set to four, so the
degree of multiplexing is fairly low.

Any ideas on how to speed things up?

-a


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Adam Thomas             adamt AT nih DOT gov

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