--On Friday, September 18, 2020 10:53 PM +0200 Simon Matter
<simon.matter@xxxxxxxxx> wrote:
mdadm --remove /dev/md127 /dev/sdf1
and then the same with --add should hotremove and add dev device again.
If it rebuilds fine it may again work for a long time.
This worked like a charm. When I added it back, it told me it was
"re-adding" the drive, so it recognized the drive I'd just removed. I
checked /proc/mdstat and it showed rebuilding. It took about 90 minutes to
finish and is now running fine.
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