Date: Fri, 29 May 1998 15:21:17 -0400 (EDT) From: Simon Shapiro <shimon@simon-shapiro.org> To: Michael Hancock <michaelh@cet.co.jp> Cc: "freebsd-current@freebsd.org" <freebsd-current@FreeBSD.ORG>, tcobb <tcobb@staff.circle.net>, Karl Pielorz <kpielorz@tdx.co.uk> Subject: Re: DPT driver fails and panics with Degraded Array Message-ID: <XFMail.980529152117.shimon@simon-shapiro.org> In-Reply-To: <Pine.SV4.3.95.980529172341.4862B-100000@parkplace.cet.co.jp>
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On 29-May-98 Michael Hancock wrote:
> On Fri, 29 May 1998, Karl Pielorz wrote:
>
>> One comment (and it's not a flame!) - honestly... ;-)
>>
>> With an array of that size, on a machine that important - did you not
>> test
>> to see what would happen with a failed drive?
>>
>
> I recently got a DPT too for a production system but my needs were not as
> critical. I use a SYM53C875 for the system disk and the DPT with 2
> mirrored drives for data. I can do some experimentation during off hours
> with this system.
>
> I would like to see the DPT stabilize such that large arrays could be
> used
> reliably so I'll try and test patches against 2.2.6, after I work out a
> budget to get more drives.
I am routinely running a Dual DPT with 38 drives on 6 busses. On
3.0-CURRENT SMP. The system did lose disk drives, either intentionally, or
by accident. I cannot confirm any of Mr. Cobb's finding. I have not been
funished with any data, including the panic point, which I suspect is not
in the DPT code. I am still waiting for such data.
Simon
---
Sincerely Yours,
Simon Shapiro Shimon@Simon-Shapiro.ORG
770.265.7340
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