I've been struggling with lvcreate for more than a hour to create a mirror'ed LV with on disk log, with no success (I'm ashamed! :-| )
Here's what I typed on a VG (with 2 X 8678 4MB extents free), it's not a free space issue...
lvcreate -m1 --mirrorlog disk -L 9G -n lvolvm1 VMVG, it complains about 2304 more extents required (wich make the exact size of the LV I want to create), plus where to define the log device to use ?
same command whith --corelog (instead of --mirrorlog disk) succeeds.
Same command without any of these 2 options fails with the same complain as the first (man page says that default no option == mirrolog disk).
Any tip ?