Bug#789152: boot fails using root=UUID= for root-device on software, raid /dev/md*

[Michael Biebl]

Control: reassign -1 mdadm

Am 18.06.2015 um 14:18 schrieb Chris Vogel:
> 
> Hi Michael,
> 
> thanks for the prompt answer!
> 
> On 18.06.2015 13:31, Michael Biebl wrote:
>> But mdadm (in jessie) ships it's own initramfs-tools hook
>> /usr/share/initramfs-tools/hooks/mdadm which is supposed to copy that
>> rules file into the initramfs.
> 
> Thanks for this information I missed. I looked at the file and found
> that the udev rule will only be copied to initramfs under two
> conditions: 1) There are md devices configured in /etc/mdadm/mdadm.conf
> and 2) INITRDSTART in /etc/default/mdadm contains a list of arrays to
> start or 'all'.
> 
> This behavior is different from Wheezy in which the udev rule was always
> copied (probably by the udev hook from the udev packet).
> 
> This change is the reason why my Jessie systems copied from a non
> software raid server on a new filesystem on a software raid device does
> not work any longer.
> 
>> In any case, this looks like something which should be handled in the
>> mdadm package and I'm inclined to re-assign this bug, unless the mdadm
>> maintainers disagree (CCed).
> 
> I totally agree after looking at the hook which comes with mdadm.

Ok, reassigning now. Please followup with the mdadm version you are using.

>> As for /usr/share/initramfs-tools/hooks/udev, I guess we should drop the
>> copy rules for the following files
>>
>> - 64-md-raid.rules (mdadm, replaced by 63-md-raid-arrays.rules,
>> 64-md-raid-assembly.rules)
> 
> Having the copy rules in two places is at least misleading while
> debugging problems...


Agreed. I've dropped those now from udev [1]

Cheers,
Michael

[1]
https://anonscm.debian.org/cgit/pkg-systemd/systemd.git/commit/?id=ab077aa
-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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