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Date:      Fri, 29 May 1998 11:43:01 +0200
From:      Eivind Eklund <eivind@yes.no>
To:        tcobb <tcobb@staff.circle.net>, "'freebsd-current@freebsd.org'" <freebsd-current@FreeBSD.ORG>, "'freebsd-scsi@freebsd.org'" <freebsd-scsi@FreeBSD.ORG>
Subject:   Re: DPT driver fails and panics with Degraded Array
Message-ID:  <19980529114301.44319@follo.net>
In-Reply-To: <509A2986E5C5D111B7DD0060082F32A402FAC2@freya.circle.net>; from tcobb on Thu, May 28, 1998 at 10:49:23PM -0400
References:  <509A2986E5C5D111B7DD0060082F32A402FAC2@freya.circle.net>

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On Thu, May 28, 1998 at 10:49:23PM -0400, tcobb wrote:
> I believe that the DPT DRIVER is not correctly sensing that the array is
> okay, even though it is in degraded mode, and incorrectly returns
> sector/MB values which panic the kernel.  I don't recommend depending on
> the proper operation of this driver for your High-Availability needs.

I have an older DPT, but I still want to add my experiences to the
above:

(1) I've had my array (a 2GB RAID1 - personal RAID :-) run in degraded
    mode.  This has worked just fine with the driver in -current, with
    the RAID full (of partitions, not data.  I can't understand that
    the amount of data should make a difference - the controller
    shouldn't know about this anyway).
(2) The DPT controller on this has reported alternating wrong sense of
    the disk setup to the BIOS.  This is obviously NOT a driver
    problem.

As for your problems, I'm sorry to hear about them, but have no idea
how to fix it.  I've had none of the problems you have :-(

Eivind.


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