Thomas Krichel writes > I want to combine hdb hdc and hdd to one logical volume. > Each is 80G. All had a single partition. I have a 2.6.8 kernel. > I run the latest Debian testing version of lvm2. I played on and found: * OS sees all three disks * I can pvcreate all disks * pvscan does not find hdc In command language, starting from scratch fafner:~# pvscan No matching physical volumes found fafner:~# pvdisplay fafner:~# fdisk -l /dev/hdb Disk /dev/hdb: 80.0 GB, 80026361856 bytes 255 heads, 63 sectors/track, 9729 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk /dev/hdb doesn't contain a valid partition table fafner:~# fdisk -l /dev/hdc Disk /dev/hdc: 80.0 GB, 80026361856 bytes 255 heads, 63 sectors/track, 9729 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk /dev/hdc doesn't contain a valid partition table fafner:~# fdisk -l /dev/hdd Disk /dev/hdd: 80.0 GB, 80026361856 bytes 16 heads, 63 sectors/track, 155061 cylinders Units = cylinders of 1008 * 512 = 516096 bytes Disk /dev/hdd doesn't contain a valid partition table fafner:~# pvcreate /dev/hdb ; pvcreate /dev/hdc ; pvcreate /dev/hdd ; Physical volume "/dev/hdb" successfully created Physical volume "/dev/hdc" successfully created Physical volume "/dev/hdd" successfully created fafner:~# pvdisplay --- NEW Physical volume --- PV Name /dev/hdc VG Name PV Size 74.53 GB Allocatable NO PE Size (KByte) 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID E725Ui-iBDc-r5uf-6vKi-L4Yw-9yzV-aJ2blr --- NEW Physical volume --- PV Name /dev/hdb VG Name PV Size 74.53 GB Allocatable NO PE Size (KByte) 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID TAfTgW-0In0-TZzF-mZoy-RsG5-v0DS-IHBvu1 --- NEW Physical volume --- PV Name /dev/hdd VG Name PV Size 74.53 GB Allocatable NO PE Size (KByte) 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID mecykK-bBKE-0wCP-W7jZ-b0g2-O697-xW4zPS fafner:~# pvscan PV /dev/hdb lvm2 [74.53 GB] PV /dev/hdd lvm2 [74.53 GB] Total: 2 [149.06 GB] / in use: 0 [0 ] / in no VG: 2 [149.06 GB] fafner:~# vgcreate vg1 /dev/hdb /dev/hdc /dev/hdd Volume group "vg1" successfully created fafner:~# vgscan Reading all physical volumes. This may take a while... Couldn't find device with uuid 'E725Ui-iBDc-r5uf-6vKi-L4Yw-9yzV-aJ2blr'. Couldn't find all physical volumes for volume group vg1. Couldn't find device with uuid 'E725Ui-iBDc-r5uf-6vKi-L4Yw-9yzV-aJ2blr'. Couldn't find all physical volumes for volume group vg1. Volume group "vg1" not found Any advice would be much welcome! Cheers, Thomas Krichel mailto:krichel@openlib.org http://openlib.org/home/krichel RePEc:per:1965-06-05:thomas_krichel _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/