Can SBACKUP use compressed tape?

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2 total messages Started by John H Meyers Tue, 04 Mar 1997 00:00

#45

Author: John H Meyers
Date: Tue, 04 Mar 1997 00:00

15 lines
994 bytes

We have:

  o Netware 3.11
  o SBACKUP.NLM 3.11b
  o HP35470A tape drive with hardware compression feature installed

Can SBACKUP be persuaded to use the hardware compression feature
already installed into the tape drive?  It does not do so now;
tape (4mm x 90m) capacity remains 2GB, as it is w/o compression.

Thanks!

-----------------------------------------------------------
With best wishes from:  John H Meyers  ( jhmeyers@mum.edu )

Re: Can SBACKUP use compressed tape?

#43

Author: Geoffrey Welsh
Date: Wed, 05 Mar 1997 00:00

20 lines
1455 bytes

(posted and mailed)

On 4 Mar 1997 19:14:03 GMT, in comp.os.netware.misc, jhmeyers@miu.edu
(John H Meyers) wrote:

>  o HP35470A tape drive with hardware compression feature installed
>
>Can SBACKUP be persuaded to use the hardware compression feature
>already installed into the tape drive?  It does not do so now;
>tape (4mm x 90m) capacity remains 2GB, as it is w/o compression.

We use an HP DDS-2 tape drive, which has jumpers on it to control
compression.  We use the mode that enables compression by default but
allows software to disable it (which SBACKUP doesn't and, as far as I
know, can't), and this is set by jumpers on the drive itself (not
necessarily on the external enclosure, and opening the latter to get
at the former might void the warranty if you've bought the whole thing
as a unit).  We definitely pack more than 4G on a 120M tape, usually
over 7G.

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