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Re: indy scsi

To: Geert Uytterhoeven <geert@linux-m68k.org>
Subject: Re: indy scsi
From: Florian Lohoff <flo@rfc822.org>
Date: Wed, 8 May 2002 16:52:44 +0200
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>, Szabo Attila <trial@ugyvitelszolgaltato.hu>, Linux/MIPS Development <linux-mips@oss.sgi.com>
In-reply-to: <Pine.GSO.4.21.0205081631510.20512-100000@vervain.sonytel.be>
Organization: rfc822 - pure communication
References: <E175RdX-0001aT-00@the-village.bc.nu> <Pine.GSO.4.21.0205081631510.20512-100000@vervain.sonytel.be>
Sender: owner-linux-mips@oss.sgi.com
User-agent: Mutt/1.3.28i
On Wed, May 08, 2002 at 04:32:35PM +0200, Geert Uytterhoeven wrote:
> On Wed, 8 May 2002, Alan Cox wrote:
> > > Yes, I know all of that, and I've expected only max 3-5 MB/sec but not
> > > 1.7.
> > > The scsi bandwith on indy is 10MB/s, the disk is above 10 MB/s.
> > > Maybe I expect too much
> > 
> > An old 2Gb 5400 RPM drive ought to deliver about 2Mbytes/second data rates.
> > The 1.7 sounds suprisingly low unless the driver code doesn't support 
> > disconnect and scsi2 tagged stuff. For an old NCR538x/9x device without
> > those it sounds all too believable.
> 
> Doesn't the Indy have a wd33c93, like the Amiga 3000? If yes, 1.7 MiB/s is
> indeed quite low.

It does have one of those. And it supports disconnect which was
the problem with the read corruption going on in former days.

Flo
-- 
Florian Lohoff                  flo@rfc822.org             +49-5201-669912
                        Heisenberg may have been here.

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