Hello,
I've got 3 harddisks with 3* 60GB partitions in a software raid 5 (/dev/md0), on this device I have installed a volume group (/dev/data/) and a logical volume mp3-crypt (the -crypt means that it is encrypt with dm_crypt). Now I decrypt the mp3 lv with:
cryptsetup create mp3 /dev/data/mp3-crypt
and then mount it with
mount /dev/mapper/mp3 /mnt/mp3
until now everything works fine, but now I want to create a snapshot of /dev/mapper/mp3.
My idea was that I make a volume group backup and then say: save the snapshot on the volume group, but I have no idea how I can say lvcreate on which volume group it has to save the snapshot.
If I make a
lvcreate -s -nsnap -L1G /dev/data/mp3-crypt
then I have a snapshot but it is encryptet and I can't mount it, even if I make a new cryptsetup for this device, every times mount says: "You must specifes a file system"
if I make a lvcreate -s -nsnap -L1G /dev/mapper/mp3 (which ist my unencrypted device) then I get a: "Volume group "mapper" doesn't exist"
How can I make a snapshot of a dm_crypt device?
Distribution is Debian sarge with kernel-2.6.10
Thanks for your help.
greetings Viets
_______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
