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Date:      Sun, 12 Apr 2020 16:37:06 +0200
From:      Stefan Bethke <stb@lassitu.de>
To:        freebsd-stable <freebsd-stable@freebsd.org>
Subject:   make kernel ignore broken SATA disk
Message-ID:  <A33629CA-63EC-45AA-AB06-09B003BBB0A6@lassitu.de>

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I have a server I don't have physical access to right now, which has a =
broken SATA disk that produces mostly errors (but not entirely).

The disk has two partitions that are part of a zpool each. I can't bring =
the system up with this disk being online, because ZFS is trying its =
darndest to use it.

I already renamed the GPT partitions in the hope that ZFS would not find =
them anymore, but it does.

I can't gpart destroy -f ada1 because "device busy".

Is there a way, ideally in the loader, to tell the kernel to ignore ada1 =
and/or ahcich5? Or can I force ZFS some other way to ignore the disk? I =
do have a spare disk I can use to replace the failed one, but I can't =
get the machine into a state where I could even issue the zpool replace =
command.


Stefan

--
Stefan Bethke <stb@lassitu.de>   Fon +49 151 14070811


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