A few weeks back I posed a question about placing a non-HP DLT on an
HP3000/959-400.  This past weekend I configured it in as a HPC1521B and hooked
it up.   This is a DLT4000 (unknown what manufacturer).   The only problem I ran
across was when I attempted to use DEVCTRL to disable hardware compression.   On
our DDS2 tape which had hardware compression we disabled hardware compression
because we were using software compression (Orbit Backup3000+).  With the DLT
disabling hardware compression does not seem to be necessary.

Here are some of the performance stats that I have come up with:

A full backup of 19M sectors took 7 hours and 4 tapes with a DDS2 drive.  A full
backup with the DLT took 3 hours and 1 tape.

A backup on 371MB took 8min and 52sec with software compression.
A backup on 371MB took 11min and 21sec without software compression.

If anyone has any questions please feel free to ask!


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Barry Durand
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