[snip] > How many PVs (physical volumes) does displayvg show? I suspect that your > second drive is not recognized as a valid LVM PV. > -- [/snip] Hi, I didn't find displayvg, but i hope the following information help you either. pvscan says: pvscan PV /dev/sda2 VG VolGroup00 lvm2 [8,34 GB / 32,00 MB free] PV /dev/sdb1 lvm2 [16,94 GB] Total: 2 [25,29 GB] / in use: 1 [8,34 GB] / in no VG: 1 [16,94 GB] erm....correct, that /dev/sdb1 is in volume group? [root@frodo ~]# lvmdiskscan /dev/sda1 [ 101,94 MB] /dev/sda2 [ 8,37 GB] LVM physical volume /dev/sdb1 [ 16,94 GB] LVM physical volume 0 disks 1 partition 0 LVM physical volume whole disks 2 LVM physical volumes lvscan says: ACTIVE '/dev/VolGroup00/LogVol00' [8,06 GB] inherit ACTIVE '/dev/VolGroup00/LogVol01' [256,00 MB] inherit ...but the 2nd disk is a 16.94 gb as shown. so it seems, i have to handle it like a now volume group? Roger