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Date:      Sat, 23 Mar 2002 19:57:20 +0200 (SAST)
From:      Willie Viljoen <will@laserfence.net>
To:        freebsd-fs@freebsd.org
Cc:        freebsd-bugs@freebsd.org
Subject:   Soft update instability with heavy IO and offboard IDE controller
Message-ID:  <20020323195007.K189-100000@phoenix.vh.laserfence.net>

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I'm posting this to both lists as a matter of interest, my apologies to
whoever should not be reading this.

I recently installed an off-board IDE controller to manage a large hard
drive in my system.

FreeBSD has been exhibiting some rather unsettling instabilities, which
usually culminate in a kernel panic.

Upon reboot after the panic, all the file systems on the drive in question
have hundreds of softupdate inconsistencies.

I searched the mailing list archives and found a similar bug involved with
striped vinum volumes and unmounting after heavy I/O.

I have encountered the bug with the GENERIC kernel included with FreeBSD
4.5-RELEASE, and all 4.5-STABLE kernels I have built after installation.

It only seems to occur when the drive is handling heavy I/O operations,
notably during a make world, or a large file copy, and even once when I
recursively changed ownership for an entire directory in /usr/home. (The
drive handles all filesystems except /)

The IDE controller is a CMD-649 PCI ATA-100 controller. CMD state on their
web site that they do not provide end-user support or hardware. The
hardware vendor, STLab, does not seem to exist.

Have I been looking in the wrong place, or simply not looking hard
enough, is this a known bug and if so how can I fix it?

Kind Regards
Willie Viljoen

-- 
Willie Viljoen
Private IT Consultant

214 Paul Kruger Avenue
Universitas
Bloemfontein
9321

South Africa

+27 51 522 15 60, a/h +27 51 522 44 36
+27 82 404 03 27

will@laserfence.net


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