using lvm to extend mirror drive

[Jerry_109]

HP-UX B.11.11 U 9000/800
9000/800/A500-7X

Hello All,

What is the correct command to extend the LV on the mirror drive after increasing the primary LV. I increased the primary LV (/dev/vg00/auditlog ).

# bdf /auditlog
Filesystem kbytes used avail %used Mounted on
/dev/vg00/auditlog 2097152 8099 1958541 0% /auditlog
root[/]

**********************************************
--- Logical volumes ---
LV Name /dev/vg00/auditlog
VG Name /dev/vg00
LV Permission read/write
LV Status available/syncd
Mirror copies 1
Consistency Recovery MWC
Schedule parallel
LV Size (Mbytes) 4096
Current LE 512
Allocated PE 1024
Stripes 0
Stripe Size (Kbytes) 0
Bad block on
Allocation strict
IO Timeout (Seconds) default

--- Distribution of logical volume ---
PV Name LE on PV PE on PV
/dev/dsk/c1t15d0 512 512
/dev/dsk/c3t15d0 512 512

--- Logical extents ---
LE PV1 PE1 Status 1 PV2 PE2 Status 2
00000 /dev/dsk/c1t15d0 02768 current /dev/dsk/c3t15d0 02768 current

**********************************************

# lvextend -L 4096 /dev/vg00/auditlog
Logical volume "/dev/vg00/auditlog" has been successfully extended.
Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf
roor[/]
# fsadm -F vxfs -b 4194304 /auditlog
vxfs fsadm: /dev/vg00/rauditlog is currently 2097152 sectors - size will be increased
root[/]
# bdf /auditlog
Filesystem kbytes used avail %used Mounted on
/dev/vg00/auditlog 4194304 8613 3924139 0% /auditlog
root@[/]
# vgdisplay -v /dev/vg00 | egrep "PE Size|Free"
PE Size (Mbytes) 8
Free PE 1289
Free PE 613
Free PE 676
root[/]
***********************************************

[RAC_1 · Accepted solution]

No need to extend mirror. It is done automatically. If you want to check it, split the mirror and do lvdisplay on it.

Anil

[Uday_S_Ankolekar]

It is already have a mirror copy extended..check with lvdisplay comamnd you will see both the disks are part of /dev/vg00/auditlog.

lvdisplay -v /dev/vg00/auditlog


-USA..

[Robert-Jan Goossens]

Hi,

No need, check with below command
# lvdisplay -v /dev/vg00/auditlog
You will see that the volume has automaticly been extended on both disks.

Hope this helps,
Robert-Jan

[Pete Randall]

Your original lvextend command would have failed if there had not been enough room to extend both the primary extent and the mirror.


Pete

[kamal_9]

Hi jerry
No need to extend the LV on the mirror disk after extending the Lv.It will do automatically

[Devender Khatana]

Hi Jerry,

Extending a lvol when it is mirrored increase the size on both copies so no need to do it seperately. Check it with "lvdisplay -v /dev/vg00/auditlog" and see the state of all physical extents.

00000 /dev/dsk/c1t15d0 02768 current /dev/dsk/c3t15d0 02768 current
00001 /dev/dsk/c1t15d0 02769 current /dev/dsk/c3t15d0 02769 current
.
.
.

All physical extents should be availabe on both disks

HTH,
Devender