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Bug 1079430

Summary: [RFE] Allow creating pmspare volume on RAID
Product: Red Hat Enterprise Linux 7 Reporter: Marian Csontos <mcsontos>
Component: lvm2Assignee: Zdenek Kabelac <zkabelac>
lvm2 sub component: Thin Provisioning QA Contact: cluster-qe <cluster-qe>
Status: CLOSED DEFERRED Docs Contact:
Severity: unspecified    
Priority: unspecified CC: agk, heinzm, jbrassow, msnitzer, prajnoha, thornber, zkabelac
Version: 7.0Keywords: FutureFeature
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Enhancement
Doc Text:
Story Points: ---
Clone Of:
: 1899140 (view as bug list) Environment:
Last Closed: 2020-11-18 15:44:35 UTC Type: Bug
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: 1899140, 1119323    

Description Marian Csontos 2014-03-21 14:38:01 UTC
At the moment pmspare is created as a linear volume. There is no way how to make it redundant.

lvcreate and lvrename fails with:

    Names including "_pmspare" are reserved. Please choose a different LV name.

Comment 2 RHEL Program Management 2014-04-01 05:47:57 UTC
This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.

Comment 3 Zdenek Kabelac 2014-11-04 07:05:12 UTC
I assume we may eventally support 'lvconvert -m+X'  for _pmspare.

On the other hand _pmspare is 'last resource' weapon not even normally used - it's reserved space for recovery operation when everything else fails thus it should not really matter which type is that.

What user should be always able to make is to 'pvmove & lvconvert' real _tmeta & _cmeta volumes.

_pmspare does not normally hold any data so it's rather lost space to use raid for such volume - lvm2 never automatically 'deletes' old metadata volume,
so there should be always original version on raid.

Comment 5 Zdenek Kabelac 2020-11-18 15:44:02 UTC
Cloned as upstream bug 1899140.