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? Thanks. Oliver