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Bug#1125390: mdadm failures: Can't open /sys/module/md_mod/parameters/legacy_async_del_gendisk

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severity 1125390 serious
thanks

On Tue, 13 Jan 2026 12:48:15 +0100 Benjamin Drung <bdrung@debian.org>
wrote:
> Dear Maintainer,
> 
> the new mdadm 4.5 breaks the dracut autopkgtests (tests 20, 26, 70,
71):
> 
> ```
> ++ mdadm --create /dev/md0 --run --level=1 --metadata=0.90 --raid-
devices=2 /dev/mapper/dracut_disk1 /dev/mapper/dracut_disk2
> mdadm: Can't open
/sys/module/md_mod/parameters/legacy_async_del_gendisk
> mdadm: init md module parameters fail
> ```
> 
> There is an upstream merge request that looks like to address this
> failure: https://github.com/md-raid-utilities/mdadm/pull/228
> 
> Upstream dracut bug:
https://github.com/dracut-ng/dracut-ng/issues/2021

This bug not only breaks the test code in dracut, but also breaks the
booting. So raising the severity.

-- 
Benjamin Drung
Debian & Ubuntu Developer

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Bug#1125390: mdadm failures: Can't open /sys/module/md_mod/parameters/legacy_async_del_gendisk Benjamin Drung <bdrung@debian.org> - 2026-01-13 12:50 +0100
  Bug#1125390: mdadm failures: Can't open /sys/module/md_mod/parameters/legacy_async_del_gendisk Benjamin Drung <bdrung@debian.org> - 2026-02-01 11:00 +0100

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