Okay, I might need a lobotomy, but I finally figured out what was going wrong. Apparently, the lvm module wasn't getting initialised at boot, so I looked at the lvm HOWTO at the Linux Documentation Project (I really must get round to donating to them) and this told me how to activate the volumes and get the module loaded at boot. Thanks to everyone who tried to help. Andy P.S. If this comes with a long signature I apologise. It's the standard company signature, and I can't get it removed. -----Original Message----- From: Cannon, Andrew [mailto:Andrew.Cannon@xxxxxxxxx] Sent: Monday, February 09, 2004 2:50 PM To: 'redhat-list@xxxxxxxxxx' Subject: RE: lvm on RH8 Find attached the method I used (along with some output) to create the logical volume (note, I think I missed copying some of the screen at some point) Unmount /work7 using the command umount -f /work7 Using fdisk, change the partition usage to 0x8e (free space, logical partition) as shown in this text dump from the screen) p print the partition table t change a partition's system id w write table to disk and exit Command (m for help): p Disk /dev/hdb: 16 heads, 63 sectors, 19841 cylinders Units = cylinders of 1008 * 512 bytes Device Boot Start End Blocks Id System /dev/hdb1 * 1 1560 786208+ 82 Linux swap /dev/hdb2 1561 19841 9213624 83 Linux Command (m for help): t Partition number (1-4): 2 Hex code (type L to list codes): 0x8e Type 0 means free space to many systems (but not to Linux). Having partitions of type 0 is probably unwise. You can delete a partition using the `d' command. Changed system type of partition 2 to 0 (Empty) Command (m for help): p Disk /dev/hdb: 16 heads, 63 sectors, 19841 cylinders Units = cylinders of 1008 * 512 bytes Device Boot Start End Blocks Id System /dev/hdb1 * 1 1560 786208+ 82 Linux swap /dev/hdb2 1561 19841 9213624 0 Empty Once this is completed, exit and write to the partition table (Option w). Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. WARNING: Re-reading the partition table failed with error 16: Device or resource busy. The kernel still uses the old table. The new table will be used at the next reboot. Syncing disks. Then use pvcreate to crate a volume group that will contain the logical volumes /userg and /work7. [root@cluster01 root]# pvcreate /dev/hdb2 pvcreate -- physical volume "/dev/hdb2" successfully created Now use lvcreate to create the logical volumes userg and work7. [root@cluster01 root]# lvcreate -L 4000 -n userg cluster01vg lvcreate -- doing automatic backup of "cluster01vg" lvcreate -- logical volume "/dev/cluster01vg/userg" successfully created [root@cluster01 root]# lvcreate -L 4000 -n work7 cluster01vg lvcreate -- doing automatic backup of "cluster01vg" lvcreate -- logical volume "/dev/cluster01vg/work7" successfully created Note that the -L option is the volume size and -n is the name of the logical volume. Next the filesystem needs to be created in the logical volumes. This is performed by the mkfs command. [root@cluster01 root]# mkfs -t ext3 /dev/cluster01vg/work7 mke2fs 1.27 (8-Mar-2002) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) 512000 inodes, 1024000 blocks 51200 blocks (5.00%) reserved for the super user First data block=0 32 block groups 32768 blocks per group, 32768 fragments per group 16000 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736 Writing inode tables: done Creating journal (8192 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 35 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. [root@cluster01 root]# mkfs -t ext3 /dev/cluster01vg/userg mke2fs 1.27 (8-Mar-2002) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) 512000 inodes, 1024000 blocks 51200 blocks (5.00%) reserved for the super user First data block=0 32 block groups 32768 blocks per group, 32768 fragments per group 16000 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736 Writing inode tables: done Creating journal (8192 blocks): done Writing superblocks and filesystem accounting information: done This filesystem will be automatically checked every 38 mounts or 180 days, whichever comes first. Use tune2fs -c or -i to override. The error messages I've getting are all a variation on the following: [root@cluster01 root]# lvdisplay /dev/cluster01vg/userg lvdisplay -- volume group "cluster01vg" of logical volume "/dev/cluster01vg/userg"is not active lvdisplay -- try -D, please [root@cluster01 root]# lvscan lvscan -- volume group "cluster01vg" is NOT active; try -D lvscan -- no logical volumes found Using lvscan -D:- [root@cluster01 root]# lvscan -D lvscan -- reading all physical volumes (this may take a while...) lvscan -- inactive "/dev/cluster01vg/userg" [3.91 GB] lvscan -- inactive "/dev/cluster01vg/work7" [3.91 GB] lvscan -- 2 logical volumes with 7.81 GB total in 1 volume group lvscan -- 2 inactive logical volumes Anyone with any ideas? Andy -----Original Message----- From: Ken Rossman [mailto:rossman@xxxxxxxxxxxx] Sent: Monday, February 09, 2004 2:42 PM To: redhat-list@xxxxxxxxxx Cc: Ken Rossman Subject: Re: lvm on RH8 On Monday, February 9, 2004, at 09:33 AM, Cannon, Andrew wrote: > I'm trying to get lvm working on one of our systems. I've gone through > the > steps (as given in the man pages) and tried to mount the filesystem. I > couldn't mount the filesystem. What error messages do you get? This would be helpful in debugging. Dumb question, but, did you build a file system on the newly created logical volume? -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list NNC's UK Operating Companies : NNC Holdings Limited (no. 3725076), NNC Limited (no. 1120437), National Nuclear Corporation Limited (no. 2290928), STATS-NNC Limited (no. 4339062) and Technica-NNC Limited (no. 235856). 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