Create a raid 1 online

[Juan Manuel López]

Hi all !.
I have a vg with 4 disk. I have got logical volumes on it, it??s full. And it is not on mirror.
Now I want to assign other 4 disk to the vg and make the mirror.
The procedure I think is:
1 pvcreate -B /dev/rdsk/CxTxDx
2 vgextend /dev/vg01 /dev/dsk/CxTxDx
3 make " lvextend -m 1 /dev/vg01/lvol1 /dev/dsk/CxTxDx " to each lv on vg01
It is possible to make it on line ? without stop nothing ?.
On my vg01 are running 3 oracle instances.
I want to make mirror without stop oracle instances. It that possible ?
Thanks in advance.
Juanma.

[U.SivaKumar_2]

Hi,
if you are mirroring root , boot , swap volume group vg00 , then only you have to use pvcreate -B /dev/rdsk/CxTxDx
In your case , volume group seems to be /dev/vg01 so don't do the above command.
pvcreate -f /dev/dsk/cxtxdx ( new disk)
vgextend /dev/vg01 /dev/dsk/cxtxdx
lvextend -m 1 /dev/vg01/lvol1 /dev/dsk/cxtxdx " to each lv on vg01

( cxtxdx not CxTxDx )

regards,
U.SivaKumar

[Juan Manuel López]

Thanks.
So can I make it online, without stop the aplications running on vg01 ?

[U.SivaKumar_2 · Accepted solution]

Hi,
Yes , You can do it online , if that volume group is not in shared mode. i.e the disks in that volume group are not connected to different servers at the same time.

It will take some time for them to sync after you mirror them. you can use lvdisplay -v /dev/vg01/lvol1 command to see the syncing
status of logical extents.

regards,
U.SivaKumar