Something similar just happened to me on my ubuntu server. It turns out that (in my case at least) that the "support missing from kernel" bit indeed *IS* accurate. After loading dm-mirror and dm-snapshot I could suddenly activate the LV. I did not try only loading dm-snapshot, but I expect that would have done the trick.
On an unrelated (and completely off-topic) note, this is the error message Ubuntu gave me: [EMAIL PROTECTED]:/etc/lvm# lvchange -ay /dev/vega/var device-mapper: reload ioctl failed: Invalid argument It was actually your bug report (the one about the "funny" error messages, that gave me the hint to solve it. :-) Cheers. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]