topic Re: lvol mirror in Operating System - HP-UX

lvol mirror

Nobody's Hero — Thu, 18 Dec 2003 11:26:44 GMT

Ok,
I have 2 8gig disks. I created /dev/vg01/lvol1
@ 4 GB on 1st disk. I created /dev/vg01/lvol2 @ 4GB on first disk using sam. looks OK.

Now I am trying to mirror these logical volumes using lvextend to the second disk and I keep getting, "Illegal Option -m"

My command is:
lvextend -m 1 /dev/vg01/lvol1 /dev/dsk/c1t6d0.

I've got something wrong here. How will lvextend know to only use half of the mirror disk c1t6d0.

OK I am confused, help please.

Re: lvol mirror

Massimo Bianchi — Thu, 18 Dec 2003 11:28:39 GMT

LVM mirroring is a pay-tool, did you buy it ? :)

Massimo

Re: lvol mirror

Jeff Schussele — Thu, 18 Dec 2003 11:29:22 GMT

Hi Robert,

Did you vgextend vg01 with the second disk before you tried to mirror?
It has to be in the VG before you can mirror.

If it's in the VG alraedy then check the distribution of the LVs with lvdisplay -v

HTH,
Jeff

Re: lvol mirror

Mark Grant — Thu, 18 Dec 2003 11:29:48 GMT

Do you have MirrorUX installed?

If not you are going to need it!

otherwise, lvextend will use exactly the same amount of c1t6d0 as the logical volume you are mirroring is using of the disk that it is on.

Remember, we are mirroring logical volumes, not real disks.

Re: lvol mirror

Jean-Luc Oudart — Thu, 18 Dec 2003 11:30:38 GMT

Check this thread :
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=38149
or this one
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=88256

Regards,
Jean-Luc

Re: lvol mirror

Nobody's Hero — Thu, 18 Dec 2003 11:31:19 GMT

No I dont think we purchased lvm mirroring. I've never used this before. We have mirroring software.

Re: lvol mirror

Ashwani Kashyap — Thu, 18 Dec 2003 11:32:08 GMT

You got to have mirror UX installed before tryting to mirror .

Re: lvol mirror

Jeff Schussele — Thu, 18 Dec 2003 11:33:31 GMT

OK - on this system run

swlist | grep -i mirror

If it comes back with nothing then you can't mirror until you purchase MirrorDisk/UX & install it.

Rgds,
Jeff

Re: lvol mirror

Pete Randall — Thu, 18 Dec 2003 11:33:33 GMT

Robert,

Check to make sure MirrorDisk/UX is installed on this machine (I know you have it on others):

root# swlist |grep -i mirror
B2491BA B.11.00 MirrorDisk/UX

Pete

Re: lvol mirror

Nobody's Hero — Thu, 18 Dec 2003 11:34:59 GMT

Super DUUUHHH.

No mirror software installed

10x
RPM

Re: lvol mirror

Helen French — Thu, 18 Dec 2003 11:35:12 GMT

Look like you donot have Mirror/UX installed on the system. Check it with:

# swlist (check for Mirror/UX software).

If you don't have one, then you need to purchase it from HP.

Re: lvol mirror

James A. Donovan — Thu, 18 Dec 2003 15:58:57 GMT

Technically, you do not need to have MirrorDisk/UX in order to create a mirror. It's just a whole lot easier to create/maintain if you do have it. Here are a couple threads on how to create a mirror disk WITHOUT MirrorDisk/UX.

http://forums1.itrc.hp.com/service/forums/parseCurl.do?CURL=%2Fcm%2FQuestionAnswer%2F1%2C%2C0xafc36af52b04d5118fef0090279cd0f9%2C00.html&admit=716493758+1071780965077+28353475

http://forums1.itrc.hp.com/service/forums/parseCurl.do?CURL=%2Fcm%2FQuestionAnswer%2F1%2C%2C0x37204b3ef09fd611abdb0090277a778c%2C00.html&admit=716493758+1071781072637+28353475