Bug 473136 - Systems with mirrored LVM drives do need labeling
Summary: Systems with mirrored LVM drives do need labeling
Alias: None
Product: Fedora Documentation
Classification: Fedora
Component: release-notes
Version: devel
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Release Notes Tracker
QA Contact: Karsten Wade
Depends On:
Blocks: fc-relnotes-traqr
TreeView+ depends on / blocked
Reported: 2008-11-26 18:24 UTC by Josh Cogliati
Modified: 2008-12-06 10:31 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2008-12-06 10:31:28 UTC

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Description Josh Cogliati 2008-11-26 18:24:53 UTC
In the release notes section for Fedora 10, it says "Systems that use Logical Volume Management (LVM) and the device mapper usually do not require relabeling."  This is incorrect if you have a mirrored LVM partition, since the UUID for the mirrored partition is not unique:

/dev/mapper/VolGroup00-lvol0_mimage_1: UUID="c9bee71a-ebda-4357-a509-cd92e4a60697" SEC_TYPE="ext2" TYPE="ext3" 
/dev/mapper/VolGroup00-lvol0_mimage_0: UUID="c9bee71a-ebda-4357-a509-cd92e4a60697" SEC_TYPE="ext2" TYPE="ext3" 
/dev/mapper/VolGroup00-lvol0: UUID="c9bee71a-ebda-4357-a509-cd92e4a60697" TYPE="ext3" LABEL="mirrored" SEC_TYPE="ext2" 

If there is no label, with the UUID mount can pick up one of the mirror images (lvol0_mimage_1 or lvol0_migage_0) which will fail.  

This is probably a bug in blkid or anaconda as well, so I will file one under blkid.  

For the release notes, it should probably mention that mirrored LVM partitions do need to be labeled.

Comment 1 Karsten Wade 2008-12-06 10:31:28 UTC
Regardless of a bug in blkid/anaconda, they still have identical UUIDs, so it is worth specifying to use labels in that case.  Fixed and should appear in the next update (web and/or fedora-release-notes update.)

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