On Wed, 31 Jul 2002, vvor wrote:
> I have two hdd, 1 contains seawolf, the other is empty.
>
> the first looks like this:
> / 3gb
> /boot 15mb
> /usr 3gb
> /home 9.8gb
> /web 3gb
>
> the other has 2 partitions, thus:
> /backup 10gb
> /netdrive 10gb
>
> about 7-8 gb of data needs to be backed up from drive 1 to drive 2 to backup
> everything.
>
> 1. can i backup from multiple partitions on one drive to a single partition
> of another drive? is tar meant for this?
Yes you can use tar and put more than one tar file on /backup. But
there may be a limit on the size of the file you can create.
> 2. how useful is this scheme? if my system drive dies, how do i recover a
> tar file from the second drive? don't i have to do a complete install on a
> new/repaired drive 1 first? if so, will i be able, e.g., to replace /usr &
> /etc, etc., et al., and have everything work as expected?
You can boot your system using the installation disk or tomsrtbt --
see http://www.toms.net/rb/ -- without doing an installation, then restore
your backup file using tar if that's what you used to make backups.
Another approach would be to make smaller partitions of /backup and
call one, say, /sysback for a copy of /, one /usrback for a copy of /usr,
and have a third partition for everything else. Then copy / into /sysback
and /usr into /usrback. For example, tar can do a copy with something
like "cd fromdir; tar clf - .|(cd todir; tar xfBp -)". Suppose, for
example, that /sysback is in the /dev/hdc3 partition. You can boot your
computer with what you called /sysback in place of / by, at the lilo
prompt, typing "linux root=/dev/hdc3". And suppose, for example, /usrback
is the /dev/hdc5 partition. If you have modified /sysback/etc/fstab to
mount /dev/hdc5 as /usr, that will be what's called /usr when you boot
with root=/dev/hdc3.
The rest of what you want backed up can be done with tar to put
files into some other partition.
> 3. should i just get a tape drive and forget about my /backup partition?
>
>
Disks are cheap, but the backup I described is vulnerable to crackers.
Tapes can be put in a drawer, where they at least cannot be reached via
the internet. However, even with tapes, if your system is compromised,
it's probably safest to restore it from the installation CD even if you
have done a backup to tape.
> thanks for any advice, i appreciate it!
>
> vora
>
>
>
>
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--
Steven Yellin
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