[Bug 1635049] Update Released
Chris Halse Rogers
chris at cooperteam.net
Wed Mar 8 00:22:15 UTC 2017
The verification of the Stable Release Update for mdadm has completed
successfully and the package has now been released to -updates.
Subsequently, the Ubuntu Stable Release Updates Team is being
unsubscribed and will not receive messages about this bug report. In
the event that you encounter a regression using the package from
-updates please report a new bug using ubuntu-bug and tag the bug report
regression-update so we can easily find any regressions.
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https://bugs.launchpad.net/bugs/1635049
Title:
Boot fails with degraded mdadm raid
Status in mdadm package in Ubuntu:
Fix Released
Status in mdadm source package in Xenial:
Fix Released
Status in mdadm package in Debian:
Fix Released
Bug description:
[Impact]
* Systems fail to boot in certain status of mdadm arrays, requiring
manual recovery / array assembly
* Backport of boot logic from yakkety
[Test Case]
* Install a system with RAID1 and two hard-drives and boot the system with array in-sync
* Shutdown
* Disconnect one of the drives and thus boot, unexpectedly, degraded
* The boot should complete.
* Shutdown, and boot again, expecting degraded state.
* The boot should complete.
* Shutdown, reconnect disconnected drive, and boot again.
* The boot should complete, add the device to the array, the array should be resyncing, and results with system with array in-sync, just like at the beginning of the testcase.
[Regression Potential]
* Systems may continue to fail to boot degraded.
[Other Info]
* Original report
mdadm does not attempt to start partial md devices (incremental
assembly) during initramfs and can cause system to fail to initramfs
prompt if rootfs on md.
http://askubuntu.com/questions/789953/how-to-enable-degraded-raid1
-boot-in-16-04lts
Fixed in debian mdadm 3.4-2: https://bugs.debian.org/cgi-
bin/bugreport.cgi?bug=784070
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