 | | | lvm on RH8 | lvm on RH8 2004-02-09 - By Cannon, Andrew
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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@(protected) root]# pvcreate /dev/hdb2
pvcreate -- physical volume "/dev/hdb2 " successfully created
Now use lvcreate to create the logical volumes userg and work7.
[root@(protected) root]# lvcreate -L 4000 -n userg cluster01vg
lvcreate -- doing automatic backup of "cluster01vg "
lvcreate -- logical volume "/dev/cluster01vg/userg " successfully created
[root@(protected) 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@(protected) 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@(protected) 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@(protected) root]# lvdisplay /dev/cluster01vg/userg
lvdisplay -- volume group "cluster01vg " of logical volume
"/dev/cluster01vg/userg "is not active
lvdisplay -- try -D, please
[root@(protected) root]# lvscan
lvscan -- volume group "cluster01vg " is NOT active; try -D
lvscan -- no logical volumes found
Using lvscan -D:-
[root@(protected) 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@(protected)]
Sent: Monday, February 09, 2004 2:42 PM
To: redhat-list@(protected)
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?
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