Neil Brown wrote:
> use --assemble --force

# mdadm --assemble --force /dev/md1
mdadm: forcing event count in /dev/sda1(0) from 163362 upto 163368
mdadm: /dev/md1 has been started with 5 drives (out of 6).

Oops, only 5 drives, but I know data is OK on all 6 drives.

I also know that there are bad blocks on more than 1 drive.  So I want
MD to recover from the other drives in those cases, which I won't be
able to with only 5 drives.

In other words, checking/repairing with only 5 drives will lead to
data corruption.

I'll stop and try again, listing all 6 drives by hand:

# mdadm --stop /dev/md1
# mdadm --assemble /dev/md1 --force  /dev/sda1 /dev/sdb1 /dev/sdc1
/dev/sdd1 /dev/sde1 /dev/sdf1
mdadm: /dev/md1 has been started with 5 drives (out of 6).

Ugh.  Didn't work.  Bug?

How do I force MD to raise the event counter on sdb1 and accept it
into the array as-is, so I can avoid bad-block induced data
corruption?
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