From owner-freebsd-fs  Sat Mar 23 10:36: 3 2002
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Date: Sat, 23 Mar 2002 10:35:20 -0800
From: Terry Lambert <tlambert2@mindspring.com>
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To: Willie Viljoen <will@laserfence.net>
Cc: freebsd-fs@freebsd.org, freebsd-bugs@freebsd.org
Subject: Re: Soft update instability with heavy IO and offboard IDE controller
References: <20020323195007.K189-100000@phoenix.vh.laserfence.net>
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Disable write caching on the drives.  THis is a FAQ.

-- Terry

Willie Viljoen wrote:
> 
> 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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