Date: Mon, 24 Nov 1997 19:52:16 +1030 From: Greg Lehey <grog@lemis.com> To: Jacques Hugo <jacques@wired.ctech.ac.za> Cc: questions@FreeBSD.ORG Subject: Re: some backup questions Message-ID: <19971124195216.29750@lemis.com> In-Reply-To: <347936EA.167EB0E7@wired.ctech.ac.za>; from Jacques Hugo on Mon, Nov 24, 1997 at 10:12:26AM %2B0200 References: <347936EA.167EB0E7@wired.ctech.ac.za>
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On Mon, Nov 24, 1997 at 10:12:26AM +0200, Jacques Hugo wrote:
> Hi there...
>
> I'm running some backups here to a DAT drive, but I'd like
> to know if I'm doing this right or where I can improve.
>
> This is what I usually do:
>
>> mt -f /dev/nrst0 erase
>> mt -f /dev/nrst0 retension
>
> Is this ok?
Well, it doesn't do any harm.
> Do I have to erase ("format ??") the new tape everytime?
No, you never need to do it. You don't need to retension, either.
> Then:
>
>> tar -czvf /dev/nrst0 /usr/home/user
>
> After this, do I have to write some 'eof' stuff to the
> volume I backed up, or can I just continue with another
> file system?
Just continue. The driver writes the EOF automatically when the tar
exits.
> I keep log of everything I back up. And if I want to restore
> some data, I;
>
>> mt -f /dev/nrst0 rewind
>> mt -f /dev/nrst0 fsf 3 (for eg.)
>> tar -xzvf /dev/nrst0
>
> I'd like to here how you guys do it.
That's pretty much correct. If you export an environment variable
TAPE, you can simplify things. For example (Bourne shell and friends)
# TAPE=/dev/nrst0; export TAPE
# mt rewind
# mt fsf 3
# tar xzv
Greg
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