Date: Wed, 19 Feb 1997 20:25:37 -0700 (MST) From: Softweyr LLC <softweyr@xmission.com> To: burton@vip.best.com (Burton Sampley) Cc: questions@freebsd.org Subject: Re: Backup questions? Message-ID: <199702200325.UAA04291@xmission.xmission.com> In-Reply-To: <Pine.BSF.3.91.970219113631.6852A-100000@bsampley.vip.best.com> from "Burton Sampley" at Feb 19, 97 11:46:08 am
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Burton Sampley asked, w.r.t. backup to a hard drive:
> Here's the output from df -k:
>
> bash$ df -k
> Filesystem 1K-blocks Used Avail Capacity Mounted on
> /dev/wd0a 31775 17068 12165 58% /
> /dev/wd0s1f 1411583 957399 341258 74% /usr
> /dev/wd2s1e 2435758 1 2240897 0% /usr2
> /dev/wd0s1e 63567 2522 55960 4% /var
> procfs 4 4 0 100% /proc
> /dev/wcd0c 640690 640690 0 100% /cdrom
> bash$
>
> 1. The second hard drive is wd2 mounted with the /usr2 file system. Will
> the tar command above store /, /var and /usr on the /usr2 fs? Do I need
> to do something different to accomplish what I want? If so, then what
> command should I use?
For tar, you would want to name a file on the /usr2 filesystem, i.e.
tar cvzf /usr2/backup.tar.gz / /var /usr
Note that the filesystem support will reduce the amount of storage you
can use on your second disk.
> 2. If not, then do I need to un-mount wd2 and then give the above tar
> command?
Yup. If you want to use the disk like it is a tape drive, don't
mount it. You don't even need to put a partition table on it if
it's going to hold nothing but your backup.
> 3. How would I restore the first drive if, I accidently 'toasted' it?
It should be possible to boot from a floppy, restore the partitions to
their original state, and just restore the backup. You'd probably be
better off using dump/restore if you want to have this ability. Dump
has the ability to dump a filesystem such that you can restore the
filesystem to its original state, not just re-write the files.
> 4. Using the above tar command can I store more than 1 'generation' on
> the 2nd drive, space permitting? I know I'll have t give each copy a
> different name to do this, but will it work?
You'd have to partition the disk in chunks and write the backups to
the various partitions.
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
http://www.xmission.com/~softweyr softweyr@xmission.com
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