From owner-freebsd-current Sun Sep 29 00:54:14 1996 Return-Path: owner-current Received: (from root@localhost) by freefall.freebsd.org (8.7.5/8.7.3) id AAA17442 for current-outgoing; Sun, 29 Sep 1996 00:54:14 -0700 (PDT) Received: from sovcom.kiae.su (sovcom.kiae.su [193.125.152.1]) by freefall.freebsd.org (8.7.5/8.7.3) with SMTP id AAA17330; Sun, 29 Sep 1996 00:54:06 -0700 (PDT) Received: by sovcom.kiae.su id AA04402 (5.65.kiae-1 ); Sun, 29 Sep 1996 10:53:59 +0300 Received: by sovcom.KIAE.su (UUMAIL/2.0); Sun, 29 Sep 96 10:53:59 +0300 Received: (from ache@localhost) by nagual.ru (8.7.6/8.7.3) id KAA00496; Sun, 29 Sep 1996 10:53:10 +0300 (MSK) Message-Id: <199609290753.KAA00496@nagual.ru> Subject: Warning: dangerous SCSI option: AHC_SCBPAGING_ENABLE To: current@freebsd.org (FreeBSD-current), scsi@freebsd.org Date: Sun, 29 Sep 1996 10:53:10 +0300 (MSK) From: =?KOI8-R?Q?=E1=CE=C4=D2=C5=CA_=FE=C5=D2=CE=CF=D7?= (Andrey A. Chernov) Organization: self X-Class: Fast X-Mailer: ELM [version 2.4ME+ PL26 (25)] Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-current@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Recently I got bad experience, the story is: I have AHC_SCBPAGING_ENABLE and one SCSI-2 disk, it works right for a long time. When I add second SCSI-2 disk, this option almost immediately seriously damage my root filesystem on _first_ disk with diagnostic: data overrun of bytes detected. Forcing a retry. When I resurrect my root filesystem and remove this option, all works right with two disks. BTW, AHC_TAGENABLE option works right in both cases. Details: ahc0: at 0x1c00-0x1cff irq 11 on eisa0 slot 1 ahc0: aic7770 >= Rev E, Single Channel, SCSI Id=7, 4 SCBs ahc0: target 0 Tagged Queuing Device (ahc0:0:0): "CONNER CFP1060S 1.05GB 2135" type 0 fixed SCSI 2 sd0(ahc0:0:0): Direct-Access 1013MB (2074880 512 byte sectors) ^^^^^^^^^^^^^^^^ first disk ahc0: target 1 Tagged Queuing Device (ahc0:1:0): "IBM DORS-32160 S84A" type 0 fixed SCSI 2 sd1(ahc0:1:0): Direct-Access 2063MB (4226725 512 byte sectors) ^^^^^^^^^^^^^^^^ second disk -- Andrey A. Chernov http://www.nagual.ru/~ache/