I am testing LVM2 under the 2.4.20 (vanilla) kernel running on RedHat
8.0. I'm Using device-mapper0.96.07 and the userspace tools
LVM2.1.95.13 packages. I applied the device-mapper kernel patches
located at
http://people.sistina.com/~thornber/patches/2.4-stable/2.4.20/2.4.20-dm-2.tar.bz2.
My problem is that I have not been able to create LV snapshots under
LVM2. Here's an example (command and output follow):
===
# /lvm2/sbin/lvcreate -s -L 20g -n snap -v mytestvg/testlv
Setting chunksize to 16 sectors.
Finding volume group "mytestvg"
Creating logical volume snap
Archiving volume group "mytestvg" metadata.
Found volume group "mytestvg"
Loading mytestvg-snap
Found volume group "mytestvg"
Zeroing start of logical volume "snap"
Found volume group "mytestvg"
Removing mytestvg-snap
Found volume group "mytestvg"
Found volume group "mytestvg"
Found volume group "mytestvg"
Loading mytestvg-testlv-real
Loading mytestvg-testlv
Loading mytestvg-snap-cow
Loading mytestvg-snap
device-mapper ioctl cmd 2 failed: Invalid argument
Couldn't load device 'mytestvg-snap'.
Creating volume group backup "/etc/lvm/backup/mytestvg"
Logical volume "snap" created
===
The logical volume is then in an "INACTIVE destination" for my original
LV, and cannot be activated. All I can do is "lvremove" it.
Any advice would be most appreciated!
Thanks,
--Gary
--
Gary Windham
Systems Programmer, Principal
The University of Arizona, CCIT
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