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Re: Moving /var



on Mon, Aug 27, 2001 at 08:33:04PM -0700, Eric G. Miller (egm2@jps.net) wrote:
> On Mon, Aug 27, 2001 at 08:09:15PM -0700, Jason Majors wrote:
> > I currently have /var on hdc, but want to move it to sda. I've tried mounting
> > the new partition as var2, copying the files, changing fstab, then rebooting,
> > but lots of programs complain. I'd guess it has something to do with the state
> > of var at the time of the copy, vs at the time of shutdown/boot. That method
> > works well for home, usr, etc.
> > Is there a good way to do this for var? other than reinstalling?
> > Thanks.
> > Jason
> 
> Definitely go into single user mode first (telint 1).  You don't want
> processes writing to log files, spool files, etc... while you do the
> migration.  When you're finished, your new partition should be mounted
> as "/var /dev/sda?" or programs will certainly complain.
> 
>   1.  Go Single User
>   2.  mount -t <ext2> /mnt /dev/sdaX

I would add at this point:

    mount -o remount,ro /var

...which ensures that your existing /var is readonly.  If anything's
actively trying to write at that point, you'll know about it.

>   3.  Copy files via your favorite method ("cp -a /var /mnt" should work).
>   4.  umount /mnt
>   5.  umount /var
>   6.  Edit fstab to point /var at /dev/sdaX
>   7.  mount /var (now on the new disk)
>   8.  exit (go back to multi-user mode)

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