Re: [CentOS] LVM Snapshot Create Error

On Saturday 30 July 2005 17.01, Kirk Bocek wrote:

Just discovered that on CentOS 4.1 when you issue the command:

lvcreate -s -n temp -L2G /dev/vgname/lvname

to create a snapshot, you get the error message:

snapshot: Required device-mapper target(s) not detected in your kernel

I think you need to do:

modprobe dm-snapshot

but I haven't tested it myself but almost the same thing happened to me when I tried to move a lv around (it then needs dm-mirror..)

good luck, Peter

I've checked and recheck my spelling and tried using the device created under /dev/mapper. I've tried it on both x86_64 and on i386. Works as expected under CentOS 3.5.

Any ideas what is going on?