disk replacement

[Paul Howarth]

Oliver Vecernik wrote:
> Hi,
> 
> I did a "standard" install of FC3. LVM was installed automatically and
> found 2 harddisks.
> 
> # lvmdiskscan
>   /dev/hda  [       37,28 GB]
>   /dev/hda1 [      101,94 MB]
>   /dev/hda2 [       37,18 GB] LVM physical volume
>   /dev/hdb  [       38,35 GB]
>   /dev/hdb1 [       38,34 GB] LVM physical volume
>   2 disks
>   1 partition
>   0 LVM physical volume whole disks
>   2 LVM physical volumes
> 
> # df -h
> Dateisystem          Größe Benut  Verf Ben% Eingehängt auf
> /dev/mapper/VolGroup00-LogVol00
>                        74G  4,4G   66G   7% /
> /dev/hda1              99M   16M   79M  17% /boot
> none                  252M     0  252M   0% /dev/shm
> 
> I want to replace /dev/hda because it is an old disk and not really
> necessary right now. ;-)
> 
> So I tried removing /dev/hdb1 from VG:
> 
> # pvmove -v /dev/hdb1
>     Finding volume group "VolGroup00"
>   No extents available for allocation
> 
> # vgreduce VolGroup00 /dev/hdb1
>   Physical volume "/dev/hdb1" still in use
> 
> Does this mean I have to reduce the LV first?
> 
> My thoughts were first to remove /dev/hdb, create two partitions, moving
> /boot and VG to it, power down, remove old disk, jumper new one as
> master and finally power up.
> 
> Can anybody give me some advice?

Sounds like a reasonable plan. Please post the output of:

# vgdisplay -v

Paul.