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Date:      Wed, 27 Oct 1999 19:40:48 -0400
From:      Iron Yuppie <aronchick@formatta.com>
To:        questions@FreeBSD.ORG
Subject:   Dump and SDT9000 Tape questions
Message-ID:  <455410205.941053248@w148.z208036085.nyc-ny.dsl.cnc.net>
In-Reply-To: <bulk.15192.19991027065408@hub.freebsd.org>

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I've just installed an Sony SDT9000 Tape drive (DDS3 DAT) I'm having a heck
of a time figuring out a bunch of things.

1) how do i figure out how much room is left on a given tape?

2) how do dump to the end of a tape (i.e. after the last dump rather than
at the start) after it's been rewound?

3) how do I restore incremental backups after the first?  restore -t
doesn't show anything but the first.

4) what do i do about compression? It's a 12/24 GB tape, so I'm thinking I
put 
"dump -0u -B 12582912 -b 64 /dev/nrsa0 /"
but that won't write to 24 GB which the tape drive is capable of with
compression.  Is there any way to enable that?

5) Finally, last night i was trying out flexbackup (the perl front end for
dump/cpio/etc) and the tape drive froze (something about "This tape doesn't
have an index at /usr/bin/flexbackup line 2385".)
and sat there for over an hour not doing anything.  So I killed the process
and tried to kill the "mt -f /dev/nrsa0 erase" but it wouldn't, and any
attempts to read/write/mount etc came back with a device busy.  I
eventually just restarted the box, but is there any way to stop this?
Thanks for all your help.


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