partition resizing

Hello,

I have to resize two partitions of one of our servers. As I've always used LVM for personal usage until now, I want to be sure that I will not make any mistakes.

We have an hardware RAID 5 array with LVM2 on top. The OS is Linux of course (Debian) with a 2.6.15 kernel.

Here is the current situation :

/dev/mapper/vg0-home on /home type ext3 (rw) /dev/mapper/vg0-srv on /srv type ext3 (rw) /dev/mapper/vg0-tmp on /tmp type ext3 (rw,nosuid,nodev) /dev/mapper/vg0-var on /var type ext3 (rw)

What I want to do is to reduce /home from 50G and extend /srv of 50G. Are the following operations safe for this ? :

#> umount /srv
#> umount /home
#> resize2fs /dev/mapper/vg0-home 50G #> lvreduce -L-50G /dev/mapper/vg0-home #> lvextend -L+50G /dev/mapper/vg0-srv #> resize2fs /dev/mapper/vg0-srv #> mount /home
#> mount /srv

Another question I wondered is : what's the difference between lvreduce/lvextend and lvresize ?

In advance thanks,
Julien

Julien Cigar
Belgian Biodiversity Platform
http://www.biodiversity.be
Universit� Libre de Bruxelles
Campus de la Plaine CP 257
B�timent NO, Bureau 4 N4 115C (Niveau 4)
Boulevard du Triomphe, entr�e ULB 2
B-1050 Bruxelles
office: [email protected]

assuming that /dev/mapper/vg0-home is 100G yes, else the option to resize2fs should be the size of /dev/mapper/vg0-home minus 50G. and you would probably have to fsck vg0-home and vg0-srv after unmounting.

i think these are 2 interfaces to the same funcrionality. L.

Luca Berra -- [email protected]
       Communication Media & Services S.r.l.
/"\
\ /     ASCII RIBBON CAMPAIGN
 X        AGAINST HTML MAIL
/ \