Help troubleshooting performance problem

[Jan Lambertz]

I m not sure if you already investigated this but s.m.a.r.t. has quite many
diagnostic info. Even if the drive has not actually been marked as broken.
This is somewhat vendor dependent. I did not check these info with openbsd
but it should be possible.
Facts from my hard drives include:
Bad sectors, read retries, write reatries and so on (dumped with some
windows tool)