Heinz, et al Sorry I failed to explain clearly what has happened. I have in fact lost 2 disks. 1 disk contained to /boot, / and the swap space, the other disk I lost was from a 3 disk LVM called datavg. I have rebuilt the system on a new disk but I have lost /etc/lvmconf, therefore (I assume) I have no metadata to restore the VG from. Unfortunately I don't have access to the system until later tonight to test if you did in fact understand my poor explanation! Many thanks, Chris. ------------------- Chris Laycock IT Specialist IBM Global Services (IDO) LITS, Stevenage Mail point: K3 STEV UK Email: LaycockC@uk.ibm.com Tel : (01438) 76-9460 (internal: 44-9460) Please respond to mauelshagen@redhat.com; Please respond to LVM general discussion and development <linux-lvm@redhat.com> Sent by: linux-lvm-bounces@redhat.com To: LVM general discussion and development <linux-lvm@redhat.com> cc: hjm@redhat.com Subject: Re: [linux-lvm] It never rains... <tt> On Sat, Mar 20, 2004 at 08:02:03AM +0000, Chris Laycock wrote: > Hi All, > > Had a bit a disaster, lost 1 disk from a 3 disk VG and the root partition! > All on fully patched RH 9 system. > I realise that I need to attach the 2 remaining PV to a LV and VG but if I > do the usual vgcreate, lvcreate & pvcreate I'll end up with two dataless > disks. No, you need to replace the failed drive, pvcreate the new one (same size as the dead one!) and vgcfgrestore the LVM metadata (see /etc/lvmconf/ and the vgcfgrestore manual page) to it in order to be able to vgscan+vgchange successfully. Presumably your 2 surviving drives have most of the data allocated you should be able to gain access to (most of) your data. lvdisplay -v ... and pvdisplay -v ... are your friends to display the actual mappings of LVs to PVs and vice/versa once you recovered with vgcfgrestore. > I luckly do have backups of some of the more important data but there not > a recenct as I'd like and don't contain all of the data or the root > partition. If critical data is allocated to the dead drive (eg, start of LV and a contained filesystem), you're in trouble and your (out-of-date) backup is your best bet. FYI: LVM2 has a --partial option for vgchange which will activate your VG ignoring any missing PVs. Regards, Heinz -- The LVM Guy -- > > Outputs from: > > vgscan > vgscan -- reading all physical volumes (this may take a while...) > vgscan -- ERROR "vg_read_with_pv_and_lv(): current PV" can't get data of > volume group "datavg" from physical volume(s) > vgscan -- "/etc/lvmtab" and "/etc/lvmtab.d" successfully created > vgscan -- WARNING: This program does not do a VGDA backup of your volume > group > > pvscan > pvscan -- reading all physical volumes (this may take a while...) > pvscan -- inactive PV "/dev/sda1" is associated to unknown VG "datavg" > (run vgscan) > pvscan -- inactive PV "/dev/hdc1" is associated to unknown VG "datavg" > (run vgscan) > pvscan -- total: 2 [45.75 GB] / in use: 2 [45.75 GB] / in no VG: 0 [0] > > pvdisplay /dev/hdc1 > > --- Physical volume --- > PV Name /dev/hdc1 > VG Name datavg > PV Size 37.28 GB [78172227 secs] / NOT usable 4.19 MB [LVM: > 165 KB] > PV# 2 > PV Status available > Allocatable yes (but full) > Cur LV 1 > PE Size (KByte) 4096 > Total PE 9541 > Free PE 0 > Allocated PE 9541 > PV UUID vozLHH-585D-SSjH-XM9b-A8g2-888k-5tZWI0 > > The two remaining disks are /dev/hdc1 & /dev/sda1 > > Thanks in advance > > Regards, > Chris. > > ------------------- > Chris Laycock > IT Specialist > IBM Global Services (IDO) > > LITS, Stevenage > Mail point: K3 STEV UK > Email: LaycockC@uk.ibm.com > Tel : (01438) 76-9460 (internal: 44-9460) > > _______________________________________________ > 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/ *** Software bugs are stupid. Nevertheless it needs not so stupid people to solve them *** =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- Heinz Mauelshagen Red Hat GmbH Consulting Development Engineer Am Sonnenhang 11 56242 Marienrachdorf Germany Mauelshagen@RedHat.com +49 2626 141200 FAX 924446 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- _______________________________________________ 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/ </tt>