slow networker backup

From: Martin Mokrejs <mmokrejs_at_prfdec.natur.cuni.cz>
Date: Mon, 24 Nov 1997 22:19:41 +0100 (MET)

Hello,
 I'm using Networker 4.2C for a while but I'm surprised how slow is the
backup(100-150kB/sec) when writing to nrmt0h! I think there's something
wrong. I checked the tape drive TLZ07 in our AS1000A(DU 4.0B), HW compression
disabled NOW(Ihad HW compression enabled before but didn't get perfmance
improvement when writing to nrmt0l).

I found in Client setup there's "Backup command" option, not found in
those Help's on Topic, Window or others. What is the default parameter?
How could I run vdump and with what options on what device?(nrmt0h or
nrmt0l). Should I turn back ON the HW compression? How can I get to perf.
about 1MB/sec ?

I do not remember where I found that /dev/nrmt0l is without compression,
and /dev/nrmt0h with compression. Also, is this software compression or is
it ONLY turning somehow ON the HW compression?

I'll summarize backup approaches under Networker....

TIA
Martin
-------------------------------------------------------------------------
| Martin MOKREJS - Net&SysAdmin |
| PGP 5.0i key at: finger://mail.natur.cuni.cz/mmokrejs |
| mmokrejs_at_natur.cuni.cz Faculty of Science, The Charles University |
| tel.: +420-2-2195 2315 Albertov 6, PRAGUE 2, 128 43, Czech Republic |
-------------------------------------------------------------------------
Received on Mon Nov 24 1997 - 22:39:19 NZDT

This archive was generated by hypermail 2.4.0 : Wed Nov 08 2023 - 11:53:37 NZDT