[linux-lvm] Use lvcreart -m to make a mirror

[Patrick Caulfield]

Fang,Dongyu wrote:
> When I use `lvcreate -l 4 --mirrors 1 -n mirror1 /dev/vg1` want to
> create  mirror LV, I got four LV:
>  ACTIVE            '/dev/vg1/mirror1' [16.00 MB] inherit
>  ACTIVE            '/dev/vg1/mirror1_mlog' [4.00 MB] inherit
>  ACTIVE            '/dev/vg1/mirror1_mimage_0' [16.00 MB] inherit
>  ACTIVE            '/dev/vg1/mirror1_mimage_1' [16.00 MB] inherit
> I think the LV mirror1 is the origin LV, mirror1_mlog is log, the two
> others should be images LV, so why there are two images(in my opinion,
> it should be only one), and I how to use then? Can I mount it?

/dev/vg1/mirror1 is the device you mount, the _mimage_ are internal devices
for LVM. You have the "original" (mimage_0) and the mirror (mimage_1).

The later revisions of LVM will hide these from the lvscan & lvs commands.
-- 

patrick