Only one blocker remaining for a successful reinstall in shutdown_mdadm:
LOG.debug('Wiping mdadm member devices: %s' % md_devs)
for mddev in md_devs:
mdadm.zero_device(mddev, force=True)
As the devices in an array are held by the container, the zero_device
above fail (as it cannot get an exclusive lock). As I see, the device
list for an array is get from /sys/block/mdxxx/md/dev-*, and
unfortunately it's populated by the underlying drives in both the array
and the container.
Is it acceptable to make the mdadm.zero_device failure non-fatal?
Otherwise it must be detected if an md device is in a container, which
isn't straightforward.
Or maybe doing a query in mdadm_shutdown, and skip zeroing if it
contains a container: key?
mdadm --query --detail /dev/md126
/dev/md126:
Container : /dev/md/imsm0, member 0
Raid Level : raid5
Array Size : 2930270208 (2794.52 GiB 3000.60 GB)
Used Dev Size : 976756736 (931.51 GiB 1000.20 GB)
Raid Devices : 4
Total Devices : 4
State : active, resyncing
Active Devices : 4
Working Devices : 4
Failed Devices : 0
Spare Devices : 0
Layout : left-asymmetric
Chunk Size : 128K
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https://bugs.launchpad.net/bugs/1893661
Title:
Support for Intel VROC (Virtual RAID On CPU)
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