Date: Wed, 27 May 1998 08:42:55 +0800 (GMT) From: Michael Robinson <robinson@public.bta.net.cn> To: freebsd-stable@FreeBSD.ORG, haskin@ptway.com Subject: Re: Bug in wd driver Message-ID: <199805270042.IAA12575@public.bta.net.cn>
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"Brian Haskin" <haskin@ptway.com> writes:
>I think what Mike is saying is that at least in this case the bad spot
>doesn't seem to be the real problem. The problem appears to be that the disk
>firmware is crashing, which is certainly an unrecoverable error.
He may be saying this, but, quoting from my original message:
<quote>
2. After this, the process requesting the I/O will be completely
locked, but the disk will continue to make seeking noises
continuously until the system is powered off.
Other processes are able to access the affected slice/partition
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
(ls, cat, etc.) without any difficulty, as long as they avoid
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
the 7 affected sectors. Any process which requires privileged
^^^^^^^^^^^^^^^^^^^^^^^
kernel calls (halt, ps, etc.) will lock immediately and
completely.
</quote>
The disk firmware absolutely did not crash. Nor, in fact, did the
disk controller, nor even the driver itself. Not even the kernel
(mostly). No crashes. A queued I/O request that never timed out, yes.
Crash, no.
-Michael Robinson
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