Public bug reported:
Binary package hint: debian-installer
On systems that are set up statically mdadm.conf is often used to list
the md devices that should be set up and the startup script just calls
mdadm --assemble --scan.
But on systems oriented towards hotplug ability this prevents arrays
from being assembled by the hotplug system.
Ubuntu has switched to set up complete (non-degraded) arrays
automatically with udev rules. But any ARRAY line in mdadm.conf created
during (package) installation prevents the hotplugging to work with
other arrays.
As only complete (non-degraded) arrays are run automatically the
automatic assembly will leave partial arrays that may be plugged in
untouched, thus the system shoud be save even without the ARRAY
restriction.
(The --no-degraded and --increamental options have been implemented with
this hotplugging in mind.)
The ARRAY lines should not be created on udev+mdadm systems.
** Affects: debian-installer (Ubuntu)
Importance: Undecided
Status: New
--
mdadm.conf is crated with explicit ARRAY statements prevents hotplug
autodetection
https://bugs.launchpad.net/bugs/252345
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