[SDBUG] Shrink a slice?

[Ronald L. Rosson Jr.]

On Feb 5, 2009, at 2:21 PM, Pedro Moreno wrote:

>  Hi people.
>
> Hi people.
>  I have been googling without any good info about: How to shrink a  
> slice?
>
>  Case: I installed a new server for mysql, is working, I already  
> install all the ports I need, them I spend a lot of hours yesterday  
> with this baby, now this is my current disk layout:
>
> /dev/ad0s1a on / (ufs, local, noatime, soft-updates)
> devfs on /dev (devfs, local)
> /dev/ad0s1f on /tmp (ufs, local, noatime, soft-updates)
> /dev/ad0s1d on /usr (ufs, local, noatime, soft-updates)
> /dev/ad0s1e on /var (ufs, local, noatime, soft-updates)
> /dev/ad0s1g on /backups (ufs, local, soft-updates)
>
>  What I want to do is to shrink the slice /dev/ad0s1g
>
> Filesystem  1M-blocks   Used  Avail Capacity  Mounted on
> /dev/ad0s1a       495    232    223    51%    /
> devfs               0      0      0   100%    /dev
> /dev/ad0s1f       495      0    456     0%    /tmp
> /dev/ad0s1d      5967   4225   1264    77%    /usr
> /dev/ad0s1e     15863   1343  13251     9%    /var
> /dev/ad0s1g    272313  48823 201704    19%    /backups
>
> Like u can see, is the last slice I have.
> I don't have info there yet and is not a freebsd default slice, I  
> know that I need to umount first.
>
> I have been reading some post but all I have seen is that ins not  
> possible or I'm wrong?
>
> I try to with sysinstall looks like don't let me do this.
>
> Is possible? what steps I need to do?
>
> Running FreeBSD 7.1-p2.
>

Probably the easiest thing to do here would be to rysnc (retaining  
permissions) it to another destination and blwoing the slice away.  
redoing it then restore back with rsync. The mount point is called  
backups so it would appear that there are no open files (unless a  
backup is happening) on this slice.

-Ron

--
Ron Rosson
ron at oneinsane.net
http://www.oneinsane.net