Message-ID: <45B9C8BF.3080101@ulb.ac.be>
Date: Fri, 26 Jan 2007 10:24:15 +0100
From: Julien Cigar <jcigar@ulb.ac.be>
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Subject: [linux-lvm] partition resizing
Reply-To: LVM general discussion and development <linux-lvm@redhat.com>
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To: linux-lvm@redhat.com

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: jcigar@ulb.ac.be