make one partition with two existing ?

[Frank Bonnet]

On 06/09/2011 10:31 AM, Polytropon wrote:
> On Thu, 09 Jun 2011 10:21:27 +0200, Frank Bonnet<f.bonnet at esiee.fr>  wrote:
>> Hello
>>
>> I have a raid 5 array ( HP hardware managed ) that contains the
>> following partitions
>>
>> -- Filesystem       Size    Used   Avail Capacity  Mounted on
>> /dev/aacd0s1a    1.9G    306M    1.5G    17%    /
>> devfs            1.0K    1.0K      0B   100%    /dev
>> /dev/aacd0s1g     10G    7.2M    9.3G     0%    /tmp
>> /dev/aacd0s1e    609G    559G    1.5G   100%    /mnt
>> /dev/aacd0s1d     97G     12G     77G    14%    /usr
>> /dev/aacd0s1f    610G    5.3G    556G     1%    /var
>>
>> What I would like to do is
>>
>> 1 - delete the /mnt partition
>> 2 - extend the /var partition with the free space left by /mnt
>>
>> Is it faisable without destroying the /var data ?
> Shpuld be possible in few steps.
>
> 1. Unmount /var and dump its content, e. g.
> 	# umount /var
> 	# dump -0a -f /usr/var.dump /dev/aacd0s1f
>
> If you can't unmount /var, see "man dump" for the -L option.
>
> 2. Delete the /dev/aacd0s1e and /dev/aacd0s1f partition, e. g.
>     using sysinsall.
>
> 3. Create a new partition /dev/aacd0s1e with the size of the
>     former /dev/aacd0s1e + /dev/aacd0s1f, e. g. using sysinstall
>     or bsdlabel.
>
> 4. Initialize the new partition /dev/aacd0s1e, e. g.
> 	# newfs -U /dev/aacd0s1e
>     Use further tunefs commands if required.
>
> 5. Mount it and restore from dump.
> 	# mount /dev/aacd0s1e /var
> 	# cd /var
> 	# restore -r -f /usr/var.dump
>
> Finally you can remove /usr/var.dump. And make a change to
> /etc/fstab for the new setting.
>
> The whole work is best done in single user mode so there
> won't be requests for writing things to /var.
>
>
>
>
>

Thanks a lot !