topic Re: multipathing on HP in Operating System - HP-UX

multipathing on HP

Amit Manna_5 — Thu, 02 Apr 2009 08:53:56 GMT

hi
How can we check if multipathing is enabled on a HP server.

Re: multipathing on HP

Duncan Edmonstone — Thu, 02 Apr 2009 08:56:43 GMT

what sort of HP server? A Proliant? A HP9000? a HP Integrity? Myabe a HP Alpha?

What OS? Windows, Linux, HP-UX? What version?

What sort of disk array? EMC Symmetrix? HP XP? HDS USP?

You need to be much more specific...

HTH

Duncan

Re: multipathing on HP

Avinash Agarkar — Thu, 02 Apr 2009 09:58:02 GMT

Hi,

in 11.23
For SANs you have to install SecurePath
For LANs you have to install AutoPath

in 11.31
SAN Multipath option comes with OS

Thanks,
Avinash

Re: multipathing on HP

Duncan Edmonstone — Thu, 02 Apr 2009 10:01:04 GMT

Incorrect.

>in 11.23
>For SANs you have to install SecurePath
>For LANs you have to install AutoPath

SecurePath is for HP disk arrays only
LAN MPIO is delivered using Auto Port Aggregation. AutoPath was an old name for SecuePath

>> in 11.31
>> SAN Multipath option comes with OS

for supported disk arrays... you need to check that your disk array will work with the 11.31 storage MPIO stack

HTH

Duncan

Re: multipathing on HP

Avinash Agarkar — Thu, 02 Apr 2009 10:30:05 GMT

Hi Duncan,

Your points are correct thanks for highlighting.

Thanks,
Avinash

Re: multipathing on HP

sujit kumar singh — Thu, 02 Apr 2009 12:39:44 GMT

Hi that is dependant on the OS Version and teh storage.

if you are using 11.23 / 11.11 of HP UNIX with HP EVA A/A or A/P storage then you need SecurePath EVA for A/A EVA disk Arrays and SecurePath EVA for A/P EVA disk Arrays respectively.

if you are using 11.23 / 11.11 of HP UNIX with HP XP A/A storage then you need SecurePath XP.

if you are using 11.23 / 11.11 of HP UNIX with EMC storage then you need EMC PowerPath
.

Multipathing with Load Balancing is an Inbuilt feature on 11.31 for A/A Disk Arrays like EVA 4K/6K/8K , XP

You shall depending on the storage that you are using need to check for the native DMP Support on 11.31.

Regards
sujit

Re: multipathing on HP

Torsten. — Thu, 02 Apr 2009 12:41:53 GMT

Define "multipathing"!

"...
In computer storage, multipath I/O is a fault-tolerance and performance enhancement technique whereby there is more than one physical path between the CPU in a computer system and its mass storage devices through the buses, controllers, switches, and bridge devices connecting them...."

http://en.wikipedia.org/wiki/Multipath_I/O

Thinking of pvlinks, you have always multipathing as long as you have multiple pathes to a device with configured access to this device.