remove mirror

[kholikt]

I have a couple of LV that has mirrored copy. Due to the disk space constraint I need to remove the mirror copy but I still want to keep my data.

Can I do this without any downtime?

[Henk Geurts]

you can just use
lvreduce -m 1 /dev// /dev/dsk/cxtxdx

where the disk is the disk where the mirror is removed from.

[Henk Geurts]

excuse me

lvreduce -m 0
ofcource.

[Adisuria Wangsadinata_1]

Hi,

Yes, you can remove the mirror without any downtime.

Use 'lvreduce' command, for more details check manpage of lvreduce :

# man lvreduce

Example :

Remove mirror copies of logical extents of a logical volume from the physical volume /dev/dsk/c1t0d0:

# lvreduce -m 0 /dev/vg01/lvol4 /dev/dsk/c1t0d0

Hope this information can help you.

Cheers,
AW

[Arunvijai_4]

#lvreduce /dev.....

-Arun

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=284128

[AwadheshPandey]

use
lvreduce -m 0 /dev/vg00/lvol3 /dev/dsk/c0t6d0

Awadhesh

[GGA]

hello do


why u dont extend vg an lv ?

for i in 1 2 3 4 5 6 7 8
do
lvreduce -m 0 /dev/vg00/lvol$i /dev/dsk/cxtxdx
done

regards gga

[Nguyen Anh Tien]

It is easy, but you must be careful.
For example:
VG Name : /dev/vg02
LV
Has one lv Name: /dev/vg02/lvglobus
And it located on 02 pv (mirrored each other)
PVName /dev/dsk/c4t0d2
PVName /dev/dsk/c4t0d4
I will reduce /dev/dsk/c4t0d4 to get more spare just type:
#lvextend -m 0 /dev/vg02/lvglobus /dev/dsk/c4t0d4
Now /dev/dsk/c4t0d4 is still belong to vg02.
If you want to more /dev/dsk/c4t0d4 to another vg let do as below
#vgreduce /dev/vg02 /dev/dsk/c4t0d4
#vgextend /dev/vgxx /dev/dsk/c4t0d4
THat's all
HTH
tienna