RH AS 4U2 - LVM extend

[Lunt, Nick]

Hi,




> -----Original Message-----
> From: Chiu, PCM (Peter) [mailto:P.C.M.Chiu at rl.ac.uk]
> Sent: 16 January 2006 08:55
> To: General Red Hat Linux discussion list; Getting started 
> with Red Hat
> Linux
> Cc: Chiu, PCM (Peter)
> Subject: RH AS 4U2 - LVM extend
> 
> 
> Hi,
> 
> I recall in the past that I was able to extend a lvm file system
> without the need of reformatting and restoring the contents, but
> I don't seem to be able to do under RH AS 4U2.
> 
> Below are the steps that I take.  vgdisplay shows the volume group
> capacity is extended, but lvdisplay shows the logical volume is not.
> Have I missed something here?
> 
> Thanks.
> 
> fdisk /dev/had to make new partitions 7 and 8 with type 8e
> 
> pvcreate /dev/hda7
> vgcreate peter-vg /dev/hda7
> lvcreate -L 2G /dev/peter-vg -n peter-lv
> mke2fs -j /dev/peter-vg/peter-lv
> mount /dev/peter-vg/peter-lv /data
> - A 2GB /data is mounted and works ok.
> 
> umount /data
> pvcreate /dev/hda8
> vgextend peter-vg /dev/hda8
> lvextend -L 4G /dev/peter-vg/peter-lv 
> 
> The last command is accepted but no action is taken.
> The /dev/peter-vg/peter-lv is still mounted as a 2GB file system.
> Tried reboot, vgscan and vgchange -ay, no luck.
> 

have you tried ext2online /dev/peter-vg/peter-lv ?

This should work with the filesystem mounted. Having said that, I've only ever used it on ext3 (journalling), but the man page says it's ext2 so you should be fine.

The filesystem should be extended after that. As it stands at the moment you've just extended the nr of extents available but not yet used them. Some shops do that to make it easy to extend filesystems when they fill up.

Good luck,
Nick .


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