hi LVM gurus! I have a Dell computer with a scsi (mounted as root), and four ide disks hda to hdd. I have hdb, hdc and hdd in a volume group vg1. hda is separate. I am running lvm2 2.01.04-5 from Debian testing. Trouble with the scsi disk let me to take it out and replace hda with a differnt physical disk that can act as root. After changing the boot sequence in the bios the machine boots up fine. I left the three other ide disks untouched. But, when I want to activate the vg, I have a problem fasolt:~# pvscan Couldn't find device with uuid 'N0i9f3-0xqW-iPyq-7EG9-e4kI-Oa3F-jPfRpC'. Couldn't find device with uuid 'N0i9f3-0xqW-iPyq-7EG9-e4kI-Oa3F-jPfRpC'. PV /dev/hdc VG vg1 lvm2 [186.30 GB / 0 free] PV unknown device VG vg1 lvm2 [167.68 GB / 0 free] PV /dev/hdb1 VG vg1 lvm2 [372.61 GB / 0 free] Total: 3 [726.59 GB] / in use: 3 [726.59 GB] / in no VG: 0 [0 ] But hdd is still there, it is just not recogized as part of vg1. fasolt:~# fdisk -l /dev/hdd Disk /dev/hdd: 180.0 GB, 180045766656 bytes 255 heads, 63 sectors/track, 21889 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk /dev/hdd doesn't contain a valid partition table I exclude hda from scanning, fasolt:~# grep hda /etc/lvm/lvm.conf filter = [ "r|/dev/cdrom|" , "r|/dev/hda|" ] # filter = [ "a|^/dev/hda8$|", "r/.*/" ] therefore it is likely that hdd is the device N0i9f3-0xqW-iPyq-7EG9-e4kI-Oa3F-jPfRpC that could not be found. What do I do now? How do I add it again saying that this is the PV that is unknown? 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/