topic Re: EMC Powerpath in Operating System - HP-UX

EMC Powerpath

Trng — Wed, 24 Jun 2009 04:25:22 GMT

Dear All,

i have few HPUX servers connected with EMC Symetrix box.How will i find out multipath configured or not (like powermt display dev=all for clarion stoage) .what is the quivalent command used for symetrix box on hpux OS??any document ,pls share it

Re: EMC Powerpath

Michal Kapalka (mikap) — Wed, 24 Jun 2009 04:36:20 GMT

hi,

the command for powerpath are the same.

powermt display dev=all

if you have mixed san enviroment clariion/symmetrix you could define a class

powermt display dev=all class=symm

class=

mikap

Re: EMC Powerpath

Jeeshan — Wed, 24 Jun 2009 05:15:57 GMT

same command

#powermt display dev=all

there is no major differences of powermt command for symmetrix

Re: EMC Powerpath

Turgay Cavdar — Wed, 24 Jun 2009 05:26:24 GMT

What is your OS version?
If you are using hp-ux 11.31 then it has its own multipathing solution.
If you have 11.23 or below version check any Powerpath software is installed:

# swlist EMCpower

to see devices
# powermt display dev=all

To see options
# powermt display options

Re: EMC Powerpath

Trng — Wed, 24 Jun 2009 06:32:24 GMT

my boxes are 11.31 and storage is symetrix box.is it reqd to configure multipath using EMC software or 11.31 will handle the mutiplathing byitself ?.

Re: EMC Powerpath

Duncan Edmonstone — Wed, 24 Jun 2009 06:38:39 GMT

EMC will claim all sorts of important reasons why you should use PP on 11.31 - you don't of course actually need it, and if you do use it you are limited to using the legacy DSFs rather than the new agile DSFs. If EMC can't come up with a show-stopper for byou, I'd suggest you save the money and just use the native MPIO stack.

To see if you have multiple paths to your EMC storage, first identify the DSFs of your EMC LUNs using:

ioscan -funNC disk

Then for each EMC disk take a look at the lunpaths the disk has to the array:

scsimgr lun_map -D /dev/rdisk/diskNN

You should see multiple active paths to the array.

HTH

Duncan

Re: EMC Powerpath

Michal Kapalka (mikap) — Wed, 24 Jun 2009 06:40:29 GMT

hi.

if you are using hp-ux 11.31 you don't need to use powerpath.

mikap

Re: EMC Powerpath

Turgay Cavdar — Wed, 24 Jun 2009 07:15:09 GMT

You dont need powerpath on hp-ux 11.31 and i also understand from the below document you cant use powerpath on hp-ux 11.31

The document blow says:

PowerPath does not manage multi-pathing on HP-UX 11i v3. Native multi-pathing is used for EMC devices.

http://docs.hp.com/en/MassStorageStack/The_Next_Generation_Mass_Storage_Stack.pdf