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



Thanks your replay.
How can I mount the "original" (mimage_0) or the "mirror" (mimage_1) single?
Because I want to verify it write/read data in both LV indeed.
And how can I remove the mirror relation between the two LV(let the "original" and "mirror" become two singe LV)? (I use `lvconvert -m 0 vg1/mirror1` then LVs become one.)
   Fang,Dongyu

Patrick Caulfield wrote:

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.

begin:vcard
fn:Dongyu Fang
n:Fang;Dongyu
version:2.1
end:vcard


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