Hi Everyone Cancel the query. I've ran out of time so I've just recreated the volumes and restoring from backups. It's starting to look like "operator error". I suspect that whilst upgrading to kernel 2.6.9-34 on another machine in the cluster I removed the LUNs from LVM. I had a bit of bother getting the lvm working and eventually recompiled from src the lvm2-cluster (version 2.02.01-1.2.RHEL4). Donald -----Original Message----- From: linux-cluster-bounces@xxxxxxxxxx [mailto:linux-cluster-bounces@xxxxxxxxxx] On Behalf Of Donald Deasy Sent: 24 May 2006 16:04 To: linux-cluster@xxxxxxxxxx Subject: LVM and GFS How to recover lost volume groupinformation Hi Everyone I have a server connected to an EMC CX300 SAN and yesterday I had a glitch on the server and lost all kernel devices. After running depmod and rebooting all the devices are back. Unfortunately LVM is only listing the server internal hard disks volume group VolGroup00. The SAN volume groups have disappeared and all the SAN LUN disks are showing up as "Uninitialized Entities". I'm assuming that the SAN LUNs are okay and I just need to recreate the LVM Metadata (without destroying the data on the SAN LUNs). Question 1 Is it possible to do this ? OS Redhat Enterprise 4 2.6.9-11.Elsmp Configured Using EMCpower.LINUX-4.4.0-343 Qla2xxx-v8.00.03b-1 Linux Cluster Suite 6.0 ccs-1.0.2-0 cman-1.0.2-0 LVM: Disk Entity: /dev/sdb1 Size: 536.48GB Partition Type: Linux (0x83) File System: No Filesystem I used system-config-lvm to create logical volumes from file storage LUNS presented from an EMC CX300 SAN. I then used the following command to create the volumes gfs_mkfs -p lock_dlm -t isli_cluster:sligfsa -j 4 /dev/VolGroupsli1/LogVolsli1disk1 The volumes have been running without problem mounted through Cluster resources GFS Resource Name: slidska Mount Point: /mnt/slidska Device: /dev/VolGroupsli1/LogVolsli1disk1 Options acl Or by hand mount -t gfs -o acl /dev/VolGroupsli1/LogVolsli1disk1 /mnt/slidska Donald Deasy Systems Manager Institute for System Level Integration Tel: +44 1506 469311 (Direct) ISLI provides postgraduate education, professional training and research in system level integration incorporating cross over technologies such as hardware, embedded software, MNT/MEMS. Details of our activities can be found at: www.sli-institute.ac.uk <http://www.sli-institute.ac.uk/> -- Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster -- Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
