Adding new disks, include in volume group

[Paul Howarth]

Gary Stainburn wrote:
> On Monday 13 June 2005 4:33 pm, Paul Howarth wrote:
> 
>>You can use ext2online to resize a mounted ext2/ext3 filesystem, so a
>>rescue CD might not be needed (ext2online can't always resize a
>>partition but it'll tell you if it can't).
>>
>>The procedure basically involves using pvcreate to create LVM
>>physical volumes on the new disks, vgextend to add those physical
>>volumes to VolGroup00 and then lvextend to make logical volume
>>/dev/VolGroup00/LogVol00 bigger. You can then resize the root
>>filesystem using either ext2online (if it works), or resize2fs from
>>rescue mode if ext2online refuses to cooperate.
>>
>>See the man pages for the various commands to see how they work. See
>>also the Linux LVM HOWTO:
>>http://www.tldp.org/HOWTO/LVM-HOWTO/
>>
>>Paul.
> 
> 
> I've tried to carry out the steps above bit came unstuck at the lvextend 
> stage.  Anyone see what I'm doing wrong?  Below is the session I was 
> running.
> 
> Gary
> 
> [root at larry1 ~]# fdisk -l /dev/hda
> 
> Disk /dev/hda: 41.1 GB, 41174138880 bytes
> 255 heads, 63 sectors/track, 5005 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
> 
>    Device Boot      Start         End      Blocks   Id  System
> /dev/hda1   *           1          13      104391   83  Linux
> /dev/hda2              14        5005    40098240   8e  Linux LVM
> [root at larry1 ~]# fdisk -l /dev/hdb
> 
> Disk /dev/hdb: 41.1 GB, 41110142976 bytes
> 16 heads, 63 sectors/track, 79656 cylinders
> Units = cylinders of 1008 * 512 = 516096 bytes
> 
>    Device Boot      Start         End      Blocks   Id  System
> [root at larry1 ~]# df
> Filesystem           1K-blocks      Used Available Use% Mounted on
> /dev/mapper/VolGroup00-LogVol00
>                       38639072   2676536  33999736   8% /
> /dev/hda1               101086     12308     83559  13% /boot
> none                    192376         0    192376   0% /dev/shm
> 
> [root at larry1 ~]# pvcreate /dev/hdb
>   Physical volume "/dev/hdb" successfully created
> [root at larry1 ~]# vgextend VolGroup00 /dev/hdb
>   Volume group "VolGroup00" successfully extended
> [root at larry1 ~]# lvextend -L +40G /dev/mapper/VolGroup00-LogVol00 
> /dev/hdb
>   Volume group mapper doesn't exist

Try this instead:

# lvextend -L +40G /dev/VolGroup00/LogVol00

Paul.