Glad to hear things have improved.
It was an update for MDADM to improve the performance in one of the recent kernel versions (which accidentally fixed the freezing bug).
The only thing to change in my system between today and the last reboot a week ago is that the kernel went from 5.11 to 5.13.
5.13 had work done to the mdadm implementation so whatever they did fixed this by accident.
Hi @UhClem I didn't see you had replied here, I guess the email notification was lost in the ether.
That command will happily trigger the stalling.
mashie@IONE:~$ dd if=/dev/zero of=/mnt/storage/60MBzero bs=12M count=5 oflag=direct
5+0 records in
5+0 records out
62914560 bytes (63 MB, 60 MiB)...
I grew successfully from 10 -> 12 and expanded the file system which took quite a while.
At this stage the stall would still happen after reboot, something had changed though as it no longer did the heavy reading/seeking on just 5 specific drives, it was now doing reading of all 12 drives and...
And off we go, the reshaping should be done by Sunday evening at the current speed:
mashie@IONE:~$ sudo mdadm /dev/md0 --add /dev/sdh1
mdadm: added /dev/sdh1
mashie@IONE:~$ sudo mdadm /dev/md0 --add /dev/sdk1
mdadm: added /dev/sdk1
mashie@IONE:~$ sudo mdadm --detail /dev/md0
/dev/md0...
I originally had the array use the on-board SATA controllers and moving to the LSI 3905 was one attempt to rule the motherboard out. I don't have a spare motherboard/cpu to try with.
The most important bits I have on Google Drive already so if the rest is lost it is mainly a massive inconvenience.
E4defrag started to speed up with many files tankfully not fragmented, it just finished:
Success: [ 22324/24054 ]
Failure: [ 1730/24054 ]
Total extents: 256096->242202
Fragmented percentage: 26%->22%
And it made no difference at all as...
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