Bug 796408

Summary:	Add detection of PowerPath devices to LVM
Product:	Red Hat Enterprise Linux 6	Reporter:	Guil Barros <gbarros>
Component:	lvm2	Assignee:	Alasdair Kergon <agk>
Status:	CLOSED ERRATA	QA Contact:	Cluster QE <mspqa-list>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.3	CC:	agk, cmarthal, dwysocha, heinzm, jbrassow, madhu.tarikere, mbroz, prajnoha, prockai, thornber, zkabelac
Target Milestone:	rc
Target Release:	6.3
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	lvm2-2.02.95-1.el6	Doc Type:	Bug Fix
Doc Text:	LVM now recognises PowerPath devices ("emcpower") and uses them in preference to the devices out of which they are constructed.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2012-06-20 15:01:41 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	607248

Description Guil Barros 2012-02-22 20:16:29 UTC

Description of problem:
LVM will currently pick a path for a pv instead of the powerpath device. The functionality requested is for lvm to notice the emcpower device and hook up to that instead. This is already committed upstream here:

http://sourceware.org/cgi-bin/cvsweb.cgi/LVM2/lib/filters/filter.c.diff?r1=1.66&r2=1.67&cvsroot=lvm2

Version-Release number of selected component (if applicable):
lvm2-2.02.87-6.el6.x86_64

How reproducible:
always

Steps to Reproduce:
1. Configure a system with EMC PowerPath as the mp driver
2. use lvm
  
Actual results:
# pvscan -v
    Wiping cache of LVM-capable devices
    Wiping internal VG cache
    Walking through all physical volumes
  PV /dev/cciss/c0d2p1    VG rootvg          lvm2 [33.91 GiB / 0    free]
  PV /dev/sda   VG vg1         lvm2 [34.69 GiB / 0    free]
...

Expected results:
# pvscan -v
    Wiping cache of LVM-capable devices
    Wiping internal VG cache
    Walking through all physical volumes
  PV /dev/cciss/c0d2p1    VG rootvg          lvm2 [33.91 GiB / 0    free]
  PV /dev/emcpoweraa   VG vg1         lvm2 [34.69 GiB / 0    free]
...

Comment 7 errata-xmlrpc 2012-06-20 15:01:41 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2012-0962.html

Comment 8 Ademar Reis 2012-07-11 14:33:04 UTC

*** Bug 825920 has been marked as a duplicate of this bug. ***