topic Re: Multipathing Software in Operating System - Linux

Multipathing Software

Anubhav Dhingra — Fri, 28 Aug 2009 22:03:04 GMT

Hi

We have rx8640 Server running RHEL 4.0 Update 6 , connected to EVA 6100. We dont have multipathing configured on OS and getting similar errors like below.

vgdisplay -v
vgdisplay : Found duplicate PV : using /dev/sda not /dev/sda

we have 6 vdisks presented from EVA 6100 (connected through 2 SAN switches) so we have 3 alternate paths for each Vdisks.

I am a HP-UX engineer and in that alternate paths are taken care by pv links. please suggest how to configure multipathing in Linux.

Re: Multipathing Software

Ivan Lyanguzov — Sat, 29 Aug 2009 18:49:01 GMT

Hi Anubhav!

You need to install HP DM:
http://www.hp.com/go/devicemapper/

Instructions on configuration can be found in Red Hat's manuals on dm-multipath.

Re: Multipathing Software

Ivan Lyanguzov — Sat, 29 Aug 2009 18:52:03 GMT

Instructions on configuration are in release notes for HP DM.

Re: Multipathing Software

Steven E. Protter — Sun, 30 Aug 2009 13:17:32 GMT

Shalom,

Built in multi pathing should be sufficient. It is easy to configure and dos not require a lot of Linux skills.

SEP

Re: Multipathing Software

dirk dierickx — Mon, 31 Aug 2009 06:30:31 GMT

guide from the RH knowledge base:

http://kbase.redhat.com/faq/docs/DOC-3691