Date: Sat, 29 Apr 1995 16:06:46 +0200 (MET DST) From: Andreas Klemm <andreas@knobel.gun.de> To: moto@CS.cmu.edu Cc: freebsd-hackers@FreeBSD.org Subject: Re: AHC2940 + Micropolis/Seagate w/wo tagged queueing Message-ID: <199504291406.QAA02352@knobel.GUN.de> In-Reply-To: <6567.798051413@GS81.SP.CS.CMU.EDU> from "moto@CS.CMU.EDU" at Apr 16, 95 12:56:53 pm
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> I have two types of drive (Micropolis 4221 and Seagate Barracuda I
> (ST11950N)) and an AHA-2490. I did some experiments with these drives
> enabling/disabling the tagged queueing option on 940412-SNAP. Here is
> the result:
>
> Machine: GATEWAY2000 P5-100
> Controller: AHA-2940
>
> Case 1) Kernel: 950412-SNAP stock
> Drive: Seagate Barracuda I
> Result: perfectly working (even with 10MB/s xfer rate).
>
> Case 2) Kernel: 950412-SNAP recompiled with AHC_TAGENABLE
> Drive: Seagate Barracuda I
> Result: panics and reboots right after the drive is probed
> no matter how fast the xfer rate is.
>
> Case 3) Kernel: 950412-SNAP stock
> Drive: Micropolis 4221
> Result: working but up to 8MB/s. When 10MB/s is selected, timeout
> occurs.
>
> Case 4) Kernel: 950412-SNAP recompiled with AHC_TAGENABLE
> Drive: Micropolis 4221
> Result: timeout occurs even with 5MB/s xfer rate as before
>
> (In either cases, only one SCSI drive is attached. No other SCSI
> devices is present.)
>
> I think that 950412 kernel is almost rock solid w.r.t. aha2940 driver,
> but looks like it still has a subtle timing problem. Not to mention,
> there is a possibility that this is just caused by a drive's firmware
> problem, though. I'd like to hear an experience from other people who
> are using aha2940. Thanks!
Whats the status of this ? We use AHA 2940 in our departement.
I'd love to see this fixed. I wanna persuade our developers to
go with FreeBSD when 2.1 is out. So this is important for me.
Andreas ///
--
andreas@knobel.gun.de /\/\___ Wiechers & Partner Datentechnik GmbH
Andreas Klemm ___/\/\/ - Support Unix - akl@wup.de -
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