Bug 886123 - [Intel F18 Bug] Failed disk is still available in volume/container
Summary: [Intel F18 Bug] Failed disk is still available in volume/container
Alias: None
Product: Fedora
Classification: Fedora
Component: mdadm
Version: 18
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Jes Sorensen
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2012-12-11 14:59 UTC by Maciej Patelczyk
Modified: 2013-01-11 23:18 UTC (History)
6 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2013-01-11 23:18:13 UTC
Type: Bug

Attachments (Terms of Use)
udev rules patch (2.11 KB, patch)
2012-12-11 14:59 UTC, Maciej Patelczyk
no flags Details | Diff

Description Maciej Patelczyk 2012-12-11 14:59:39 UTC
Created attachment 661502 [details]
udev rules patch

Description of problem:
When we have a raid volume and one of disks fails, the failed disk is still present in volume and container. The raid volume is in normal state (should be  degraded) and rebuild cannot start. 

How reproducible:

Steps to Reproduce:
mdadm -Ss
mdadm --zero-superblock /dev/sd[b-d]
mdadm -C /dev/md/imsm0 -amd -e imsm -n 3 /dev/sdb /dev/sdc /dev/sdd -R
mdadm -C /dev/md/raid5 -amd -l5 -n 3 /dev/sdb /dev/sdc /dev/sdd -R
mdadm --wait /dev/md/raid5
# power off a raid member disk (e.g. /dev/sdd)

Actual results:
The failed disk is still present in container/volume. State in 'mdadm -D /dev/md/raid5' output is 'clean'.

Expected results:
The failed disk should disappear from container and volume. State in 'mdadm -D /dev/md/raid5' output should be 'clean, degraded'.

Additional info:
When one of disks fails udev runs "/usr/lib/udev/rules.d/65-md-incremental.rules". The "65-md-incremental.rules" script has following rules:
SUBSYSTEM=="block", ACTION=="remove", ENV{ID_FS_TYPE}=="linux_raid_member", \
        RUN+="/sbin/mdadm -If $name --path $env{ID_PATH}"
SUBSYSTEM=="block", ACTION=="remove", ENV{ID_FS_TYPE}=="isw_raid_member", \
        RUN+="/sbin/mdadm -If $name --path $env{ID_PATH}"

If a disk fails and "$env{ID_PATH}" is null, udev runs "/sbin/mdadm -If sdd --path" (what does nothing - it is an incorrect mdadm's command), instead of "/sbin/mdadm -If sdd".

The following patch fixes this bug:

Comment 1 Fedora Update System 2012-12-11 16:25:48 UTC
mdadm-3.2.6-7.fc18 has been submitted as an update for Fedora 18.

Comment 2 Fedora Update System 2012-12-11 20:04:45 UTC
Package mdadm-3.2.6-7.fc18:
* should fix your issue,
* was pushed to the Fedora 18 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing mdadm-3.2.6-7.fc18'
as soon as you are able to.
Please go to the following url:
then log in and leave karma (feedback).

Comment 3 Lukasz Dorau 2012-12-13 08:39:27 UTC
Intel has tested the package mdadm-3.2.6-7.fc18 and confirms the bug is fixed in this build.

Comment 4 Fedora Update System 2013-01-11 23:18:15 UTC
mdadm-3.2.6-7.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

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