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Date:      Wed, 23 Apr 1997 12:01:33 +0200
From:      Andreas Klemm <andreas@klemm.gtn.com>
To:        Tom Samplonius <tom@uniserve.com>, Brian Tao <taob@nbc.netcom.ca>, freebsd-current@FreeBSD.ORG
Subject:   Re: "Data overrun" with 3.0-SNAP, 2940UW controllers
Message-ID:  <19970423120133.44163@klemm.gtn.com>
In-Reply-To: <199704202022.OAA27273@pluto.plutotech.com>; from Justin T. Gibbs on Sun, Apr 20, 1997 at 02:21:03PM -0600
References:  <Pine.NEB.3.95.970420114115.11865B-100000@haven.uniserve.com> <199704202022.OAA27273@pluto.plutotech.com>

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On Sun, Apr 20, 1997 at 02:21:03PM -0600, Justin T. Gibbs wrote:
> >  Also, make sure you are using tagged commands, but no scb paging.  scb
> >pagin support isn't complete yet, and the non tagged command code is
> >poorly tested.
> 
> I actually think that scb paging works just fine now.  I've also been 
> testing without tagged queueing lately and as soon as we get our news
> feed up here at work, it will get even more testing.
> 
> If SCB paging doesn't work for you, I certainly want to hear about it.

SCB_PAGING && friends run really fine here on a FreeBSD 2.2-STABLE
machine. Weeks ago I also had the reported timeouts and such. And
additionally problems with the firmware of my scsi disks, that got
a QUEUE_FULL condition when activating tagged command queuing and
having to deal with more than 3 tags.

I'd also recommend you to get the latest SCSI fixes by upgrading to
FreeBSD-2.2-STABLE (the RELENG_2_2 tree) or to use -current if you
like. Here my configuration for reference, which runs really fine
now.

Many thanks to Justin !

# SCSI Devices
controller	scbus0
device		sd0			# Harddisk 0 - DOS/FreeBSD SMP
device		sd1			# Harddisk 1 - FreeBSD Boot
device		sd2			# Harddisk 2 - FreeBSD local
device		st0			# TDC 4222
device		cd0			# TOSHIBA XM-5701TA 3136
options		AHC_TAGENABLE
options		AHC_ALLOW_MEMIO
options		AHC_SCBPAGING_ENABLE
options		SCSI_REPORT_GEOMETRY

ahc0 <Adaptec 2940 SCSI host adapter> rev 3 int a irq 11 on pci0:13
ahc0: aic7870 Single Channel, SCSI Id=7, 16/255 SCBs
ahc0: target 0 Tagged Queuing Device
(ahc0:0:0): "IBM DORS-32160 WA6A" type 0 fixed SCSI 2
sd0(ahc0:0:0): Direct-Access 2063MB (4226725 512 byte sectors)
sd0(ahc0:0:0): with 6703 cyls, 5 heads, and an average 126 sectors/track
ahc0: target 1 Tagged Queuing Device
(ahc0:1:0): "IBM DORS-32160 WA6A" type 0 fixed SCSI 2
sd1(ahc0:1:0): Direct-Access 2063MB (4226725 512 byte sectors)
sd1(ahc0:1:0): with 6703 cyls, 5 heads, and an average 126 sectors/track
ahc0: target 2 Tagged Queuing Device
(ahc0:2:0): "IBM DORS-32160 WA6A" type 0 fixed SCSI 2
sd2(ahc0:2:0): Direct-Access 2063MB (4226725 512 byte sectors)
sd2(ahc0:2:0): with 6703 cyls, 5 heads, and an average 126 sectors/track
ahc1 <Adaptec 2940 SCSI host adapter> rev 3 int a irq 15 on pci0:14
ahc1: aic7870 Single Channel, SCSI Id=7, 16/255 SCBs
(ahc1:4:0): "TANDBERG  TDC 4222 =07:" type 1 removable SCSI 2
st0(ahc1:4:0): Sequential-Access density code 0x0,  drive empty
(ahc1:6:0): "TOSHIBA CD-ROM XM-5701TA 3136" type 5 removable SCSI 2
cd0(ahc1:6:0): CD-ROM cd present [325252 x 2048 byte records]

-- 
andreas@klemm.gtn.com         /\/\___      Wiechers & Partner Datentechnik GmbH
   Andreas Klemm          ___/\/\/         Support Unix -- andreas.klemm@wup.de
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