mirroring in hp-ux

[Ajin_1]

Dear Sir

how to mirror a logical volume in hp-ux

Please help.

Regards

AJN

[James R. Ferguson]

Hi:

See the 'lvextend' manpages --- the '-m' option.

Regards!

...JRF...

[Berd]

Hi AJN,

Example below

Mirror a logical volume onto a particular physical volume.

lvextend -m 1 /dev/vg00/lvol3 /dev/dsk/c0t3d0

Berd

[Johnson Punniyalingam]

>>how to mirror a logical volume in hp-ux<<

Step 1:- Check if you HPUX/Mirror Installed. than only you try to mirror logical volume in HPUX

# swlist -l product |grep -i Mirror

Very Good. Good Examples are give in "man lvextend" as mentioned by >>JRF<<

man lvextend

add the by below command to "volume group" if you already add the disk, skip below "vgextend" stright away proceed with "lvextend"

# vgextend /dev/vgname /dev/dsk/cxtxdx

# lvextend -m 1 /dev/vgname/lvname /dev/dsk/cxtxdx

(pls take note you do lvextend for lvol's residing under "volume group" eg. lvol 1, 2,3,4 ... etc

[Johnson Punniyalingam]

Also please refer to "HP offical" documents "prepared" steps /procedure to Mirror disks

http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad_WP.pdf

[Steven E. Protter]

Shalom,

First run a hardware reality check.

Most rx class HP-UX systems have hardware raid and you don't need to mirror.

To mirror LVM you need to have mirror-ux installed.

The process is as noted above
lvextend -L
lvextend -m 1
extendfs/fsadm

fsadm extension requires OnlineJFS another paid add in program to HP-UX.

SEP

[Sp4admin]

Looks like you have the answer. One more thing is if you havd SAS controller you can mirror the hard drive at the hardware level.

sp,