topic LVM redundancy in Operating System - HP-UX

LVM redundancy

Xav_2 — Fri, 19 Dec 2008 20:05:05 GMT

Hi,

I have 2 HBAs connected to two SAN switches which are connected and zoned to two different ports of the EMC storage array.
We see four different devices for each LUN that we masked, the system sees the disks correctly, scsimgr lun_map or get_info, LUN path
count is only 1. It should be 2.
My os version is 11.31

How can I make the system see the other path?

To configure the alternate path for the redundancy should I used the vgextend command?

Re: LVM redundancy

VK2COT — Fri, 19 Dec 2008 20:20:48 GMT

Hello,

Make it simple and proper.

Use agile view when you add physical volumes
into volume groups. As simple as that.

Multipathing is then native and easy
in HP-UX 11.31.

Cheers,

VK2COT

Re: LVM redundancy

Xav_2 — Fri, 19 Dec 2008 20:29:56 GMT

Hello,

Thanks for the recommendation.

The vgextend command is the correct command to configure the alternate path for the redundancy?

Where can I find the agile view and documentation if possible?

Thanks.

Re: LVM redundancy

James R. Ferguson — Fri, 19 Dec 2008 20:38:06 GMT

Hi:

Yes, the 'vgextend' command adds alternate links to an LVM volume group.

There are a number of excellent whitepapers on LVM in 11.31. See the "LVM VOlume Manager" section here:

http://docs.hp.com/en/hpux11iv3.html

In particular, you can see:

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01919369/c01919369.pdf (BSC link updated by admin)

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01916036/c01916036.pdf (BSC link updated by admin)

Regards!

...JRF...

Re: LVM redundancy

Xav_2 — Fri, 19 Dec 2008 20:48:41 GMT

That's great.

Thank you very much for all your help.