extending an LV which is mirrored

[Kavita Poonia]

Hello there,

I have got some doubt regarding lvextend.I need to extend an LV to 2816 MB which is in volume group vg00 and it is mirrored.Then should I use the below command:

lvextend -m 1 -L 2816 /dev/vg00/lvol5

fsadm -F vxfs -b 2816m /opt


And should I also need to make a copy of file /etc/lvmconf/vg00.conf as the logical volume is in vg00 which is a root volume group.

Please reply as soon as possible

Thanks a lot

Regards
Kavita

[Norm Diederich]

Kavita,

If you have advanced JFS then you can extend online with SAM.

If not, you are going to need to boot in single user mode so that /opt can be unmounted.

Interrup the BOOT

hpux -iS

Assuming /opt is unmounted, the following two commands will extend the lv and file sytem.

lvextend -L 2816 /dev/vg00/lvol5

(you don't need to specify the mirror after it has been configured)

extendfs /dev/vg00/rlvol5

At this point you can mount the file system and continue your boot.

Regards,
Norm

[Emil Velez]

with online jfs that should take care of the filesystem level

If you extend a logical volume and it is mirrored it finds extents on the disks in the VG for the mirror. Unless you have a 2 disk vg and the first disk is all full that should not be a problem. Luckilly you are not talking about lvol1,2,3 which have certain rules about being contiguous.