[VROC] [Ub 24.04] mdadm: grow for R0 not start - missing patch

[Kinga Tanska]

Steps to reproduce:
1. Create RAID volume e.g.:
# mdadm -C /dev/md/imsm0 -e imsm -n 2 /dev/nvme0n1 /dev/nvme1n1 -R
# mdadm -C /dev/md/MyVolume -l0 -n 2 /dev/nvme[0-1]n1 -R
2. Add additional drive(s) to an IMSM array using command e.g.:
# mdadm --add /dev/md/imsm0 /dev/nvme2n1
3. Execute grow command on array with additional drives:
# mdadm --grow /dev/md/imsm0 --raid-devices=N
4. Wait for reshape start on given volume
# cat /proc/mdstat

Expected result:

Reshape started successfully, no errors reported

Actual result:

Reshape didn't start on given volume

It is already fixed in mdadm. Please add those patches to mdadm:

- https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/commit/?id=b0f4e8e30f38d83f7e3f53d01d72d4cb3b4d42d7

- https://git.kernel.org/pub/scm/utils/mdadm/mdadm.git/commit/?id=aa1cc5815d2b14a8b47add18cfaa8264e19c10ce

[Kinga Tanska (ktanska)]

Hello,

do you have any update?

[Hector CAO (hectorcao)]

Hello @ktanska and affected users,

A test package with the fix is available in this PPA:

https://launchpad.net/~hectorcao/+archive/ubuntu/2069821/

Could you help on confirming the fix ?

Thanks,