[TriLUG] OT: mounting a directory on a different volume
Jon Carnes
jonc at nc.rr.com
Tue Apr 29 23:58:51 EDT 2003
This works for see the data in two places, though the data is still only
in one place. If you want the data backed-up (on both volumes at the
same time), then you are looking at using something like rsync across
the two volumes.
Good Luck - Jon Carnes
On Tue, 2003-04-29 at 23:06, Jeremy Portzer wrote:
> On Tue, 2003-04-29 at 22:44, Greg Brown wrote:
>
> > I have two disks in my system, one of which contains the home directory
> > and one of which contains my /opt directory.
> >
> > df -h output:
> > /dev/hda3 7906196 3940416 3564156 53% /
> > /dev/hda2 248895 10197 225846 5% /boot
> > /dev/hda4 10449900 2686836 7232116 28% /home
> > /dev/hdb1 76920416 36622148 36390860 51% /opt
> >
> > I would like to mount /opt/backups/g-mac on /home/gwbrown1/g-mac so
> > that anything created in /home/gwbrown1/g-mac to /opt/backup/g-mac
>
> You could do this with bind mounts.
> mount --bind /home/gwbrown1/g-mac /opt/backup/g-mac
> [you'll need to make sure the empty directory /opt/backup/g-mac exists
> first]
>
> But I agree with Greg Woodbury, symlinks are probably what you really
> want. Bind mounts are still a little esoteric.
>
> One tip about symlinks -- always try to avoid using absolute paths in
> the symlink. This can save you endless hassle later on if you need to
> mount your / partition somewhere else, such as /mnt/sysimage as used by
> RHL's rescue mode.
>
> For example, have a symlink called g-mac, in the /opt/backup directory,
> point to "../../home/gwbrown1/g-mac" . Don't use the absolutely syntax
> of "/home/gwbrown1/g-mac" .
>
> Hope this helps,
>
> Jeremy
>
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