topic Re: migrating data using lvmirror in Operating System - HP-UX

migrating data using lvmirror

hpuxhelp — Fri, 06 Feb 2004 15:50:01 GMT

hi all

Here are the steps that I would like to go over it with you

insf -e - to bring in the new disk
pvcreate -f /dev/rdsk/newdisk
vgextend /dev/vgx /dev/dsk/newdisk
lvextend -m 1 /dev/vgx/lvol1 /dev/dsk/newdisk
lvreduce -m 0 /dev/vgx/lvol1 /dev/dsk/olddisk

my question: when i do lvreduce to reduce the mirror on the old disk, this doesn't automatically remove the /dev/dsk/olddisk from the vgx... am I correct on this... ? thanks so much your help

Re: migrating data using lvmirror

A. Clay Stephenson — Fri, 06 Feb 2004 15:52:47 GMT

After you have migrated and lvreduced all LVOL's in question then you do a vgreduce to remove the physical volume from the VG.

Re: migrating data using lvmirror

hpuxhelp — Fri, 06 Feb 2004 15:54:31 GMT

the reason that I don't want to use vgreduce to reduce the old disk out because only a certain logical volume that I need to migrate into the new disk ...

Re: migrating data using lvmirror

Sridhar Bhaskarla — Fri, 06 Feb 2004 15:55:03 GMT

Hi,

Yes. You will need to do a 'vgreduce' on it.

vgreduce vgxx /dev/dsk/cxtyd0

Before that make sure you don't have any logical volumes on it by

pvdisplay -v /dev/dsk/cxtyd0

-Sri

Re: migrating data using lvmirror

Sridhar Bhaskarla — Fri, 06 Feb 2004 15:57:18 GMT

I am sorry. My previous response was not for your second question. I clicked submit and waited so long to get it posted.

If you do an lvreduce -m 0, you don't have to worry about the physical volume being reduced out of the VG. Only the logical volume will be reduced.

-Sri