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Bug 790155

Summary: LVM RAID: Unable to activate RAID device with a failed device
Product: Red Hat Enterprise Linux 6 Reporter: Jonathan Earl Brassow <jbrassow>
Component: lvm2Assignee: Jonathan Earl Brassow <jbrassow>
Status: CLOSED ERRATA QA Contact: Cluster QE <mspqa-list>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 6.2CC: agk, cmarthal, dwysocha, heinzm, jbrassow, mbroz, prajnoha, prockai, thornber, zkabelac
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: lvm2-2.02.95-1.el6 Doc Type: Bug Fix
Doc Text:
New Feature to 6.3. No documentation required. Bug 732458 is the bug that requires a release note for the RAID features. Other documentation is found in the LVM manual. Operational bugs need no documentation because they are being fixed before their initial release.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2012-06-20 15:01:21 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:

Description Jonathan Earl Brassow 2012-02-13 19:38:38 UTC 
It should be possible to activate a RAID device that has suffered a device failure, as long as:
1) The '--partial' flag is used
2) The redundancy of the RAID type has not been exceeded (failing two devices in a RAID 4 array for example)
Comment 1 Jonathan Earl Brassow 2012-02-13 19:48:22 UTC 
The bug was introduced in commit 02f6f4902fd90709f55e2e97e969ee28c2945c81, but fixed in 9159aec6f1eb36e70ed11691e0704ccf8a718c8f.  These are intra-release (2.02.90) commits, so as long as we pull in everything or nothing we should be ok.
Comment 3 Corey Marthaler 2012-04-20 20:12:45 UTC 
Fix verified in the latest rpms.


2.6.32-262.el6.x86_64
lvm2-2.02.95-5.el6    BUILT: Thu Apr 19 10:29:01 CDT 2012
lvm2-libs-2.02.95-5.el6    BUILT: Thu Apr 19 10:29:01 CDT 2012
lvm2-cluster-2.02.95-5.el6    BUILT: Thu Apr 19 10:29:01 CDT 2012
udev-147-2.41.el6    BUILT: Thu Mar  1 13:01:08 CST 2012
device-mapper-1.02.74-5.el6    BUILT: Thu Apr 19 10:29:01 CDT 2012
device-mapper-libs-1.02.74-5.el6    BUILT: Thu Apr 19 10:29:01 CDT 2012
device-mapper-event-1.02.74-5.el6    BUILT: Thu Apr 19 10:29:01 CDT 2012
device-mapper-event-libs-1.02.74-5.el6    BUILT: Thu Apr 19 10:29:01 CDT 2012
cmirror-2.02.95-5.el6    BUILT: Thu Apr 19 10:29:01 CDT 2012



# RAID BEFORE A FAILURE
[root@taft-02 ~]# lvs -a -o +devices
 LV                                      VG         Attr     LSize   Copy%  Devices
 synced_primary_raid1_2legs_1            black_bird rwi-aom- 500.00m 100.00 synced_primary_raid1_2legs_1_rimage_0(0),synced_primary_raid1_2legs_1_rimage_1(0),synced_primary_raid1_2legs_1_rimage_2(0)
 [synced_primary_raid1_2legs_1_rimage_0] black_bird iwi-aor- 500.00m        /dev/sdc1(1)
 [synced_primary_raid1_2legs_1_rimage_1] black_bird iwi-aor- 500.00m        /dev/sdb1(1)
 [synced_primary_raid1_2legs_1_rimage_2] black_bird iwi-aor- 500.00m        /dev/sdh1(1)
 [synced_primary_raid1_2legs_1_rmeta_0]  black_bird ewi-aor-   4.00m        /dev/sdc1(0)
 [synced_primary_raid1_2legs_1_rmeta_1]  black_bird ewi-aor-   4.00m        /dev/sdb1(0)
 [synced_primary_raid1_2legs_1_rmeta_2]  black_bird ewi-aor-   4.00m        /dev/sdh1(0)

# RAID AFTER A FAILURE
[root@taft-02 ~]# lvs -a -o +devices
 /dev/sdc1: read failed after 0 of 512 at 145669554176: Input/output error
 /dev/sdc1: read failed after 0 of 512 at 145669664768: Input/output error
 /dev/sdc1: read failed after 0 of 512 at 0: Input/output error
 /dev/sdc1: read failed after 0 of 512 at 4096: Input/output error
 /dev/sdc1: read failed after 0 of 2048 at 0: Input/output error
 Couldn't find device with uuid 8sibWI-ls8I-NeNt-tVbI-C1l3-VHJ4-kpSJck.
 LV                                      VG         Attr     LSize   Copy%  Devices
 synced_primary_raid1_2legs_1            black_bird rwi-aom- 500.00m 100.00 synced_primary_raid1_2legs_1_rimage_0(0),synced_primary_raid1_2legs_1_rimage_1(0),synced_primary_raid1_2legs_1_rimage_2(0)
 [synced_primary_raid1_2legs_1_rimage_0] black_bird iwi-aor- 500.00m        unknown device(1)
 [synced_primary_raid1_2legs_1_rimage_1] black_bird iwi-aor- 500.00m        /dev/sdb1(1)
 [synced_primary_raid1_2legs_1_rimage_2] black_bird iwi-aor- 500.00m        /dev/sdh1(1)
 [synced_primary_raid1_2legs_1_rmeta_0]  black_bird ewi-aor-   4.00m        unknown device(0)
 [synced_primary_raid1_2legs_1_rmeta_1]  black_bird ewi-aor-   4.00m        /dev/sdb1(0)
 [synced_primary_raid1_2legs_1_rmeta_2]  black_bird ewi-aor-   4.00m        /dev/sdh1(0)

[root@taft-02 ~]# vgchange -an black_bird
 /dev/sdc1: read failed after 0 of 512 at 145669554176: Input/output error
 /dev/sdc1: read failed after 0 of 512 at 145669664768: Input/output error
 /dev/sdc1: read failed after 0 of 512 at 0: Input/output error
 /dev/sdc1: read failed after 0 of 512 at 4096: Input/output error
 /dev/sdc1: read failed after 0 of 2048 at 0: Input/output error
 Couldn't find device with uuid 8sibWI-ls8I-NeNt-tVbI-C1l3-VHJ4-kpSJck.
 0 logical volume(s) in volume group "black_bird" now active

# ACTIVATE ATTEMPT W/O THE --PARTIAL FLAG
[root@taft-02 ~]# vgchange -ay black_bird
 Couldn't find device with uuid 8sibWI-ls8I-NeNt-tVbI-C1l3-VHJ4-kpSJck.
 Refusing activation of partial LV synced_primary_raid1_2legs_1. Use --partial to override.
 0 logical volume(s) in volume group "black_bird" now active

# ACTIVATE ATTEMPT W/ THE --PARTIAL FLAG
[root@taft-02 ~]# vgchange --partial -ay black_bird
 Partial mode. Incomplete logical volumes will be processed.
 Couldn't find device with uuid 8sibWI-ls8I-NeNt-tVbI-C1l3-VHJ4-kpSJck.
 1 logical volume(s) in volume group "black_bird" now active

[root@taft-02 ~]# lvs -a -o +devices
 Couldn't find device with uuid 8sibWI-ls8I-NeNt-tVbI-C1l3-VHJ4-kpSJck.
 LV                                      VG         Attr     LSize   Copy%  Devices
 synced_primary_raid1_2legs_1            black_bird rwi-a-m- 500.00m 100.00 synced_primary_raid1_2legs_1_rimage_0(0),synced_primary_raid1_2legs_1_rimage_1(0),synced_primary_raid1_2legs_1_rimage_2(0)
 [synced_primary_raid1_2legs_1_rimage_0] black_bird iwi-a-r- 500.00m        unknown device(1)
 [synced_primary_raid1_2legs_1_rimage_1] black_bird iwi-aor- 500.00m        /dev/sdb1(1)
 [synced_primary_raid1_2legs_1_rimage_2] black_bird iwi-aor- 500.00m        /dev/sdh1(1)
 [synced_primary_raid1_2legs_1_rmeta_0]  black_bird ewi-a-r-   4.00m        unknown device(0)
 [synced_primary_raid1_2legs_1_rmeta_1]  black_bird ewi-aor-   4.00m        /dev/sdb1(0)
 [synced_primary_raid1_2legs_1_rmeta_2]  black_bird ewi-aor-   4.00m        /dev/sdh1(0)
Comment 4 Jonathan Earl Brassow 2012-04-23 18:29:13 UTC 
    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
New Feature to 6.3.  No documentation required.

Bug 732458 is the bug that requires a release note for the RAID features.  Other documentation is found in the LVM manual.

Operational bugs need no documentation because they are being fixed before their initial release.
Comment 6 errata-xmlrpc 2012-06-20 15:01:21 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