From owner-freebsd-scsi Tue Aug 19 21:05:09 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id VAA26410 for freebsd-scsi-outgoing; Tue, 19 Aug 1997 21:05:09 -0700 (PDT) Received: from kaori.communique.net (kaori.communique.net [204.27.67.55]) by hub.freebsd.org (8.8.5/8.8.5) with ESMTP id VAA26394 for ; Tue, 19 Aug 1997 21:05:00 -0700 (PDT) Received: by kaori.communique.net with Internet Mail Service (5.0.1458.49) id ; Tue, 19 Aug 1997 23:04:59 -0500 Message-ID: From: Raul Zighelboim To: "'Justin T. Gibbs'" , Greg Lehey Cc: FreeBSD SCSI Mailing List Subject: RE: Bus resets. Grrrr. Date: Tue, 19 Aug 1997 23:04:57 -0500 X-Priority: 3 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1458.49) Content-Type: text/plain Sender: owner-freebsd-scsi@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk > The system hung solid with no kernel messages or were you in X so > you couldn't see them? There is no guarantee that driver messages > will make it into the log file if the SCSI bus is wedged. I wasn't > aware of any problems with SCB paging, so I'd be very interrested > in any information you can provide on this problem. In most cases, > BTW, SCB paging isn't a win unless you are also using tagged queuing > (option AHC_TAGENABLE). > > [Raul Zighelboim] MMM... I set options AHC_SCBPAGING_ENABLE on the kernel a few days ago, and the system hanged solid while running the 'bytebench' benchmark. Removed the option, and run bytebench clean: This under 2.2.2-RELEASE with 2 AHC cards and some quantum viking drives: ahc0 rev 0 int a irq 9 on pci0:12 ahc0: aic7880 Wide Channel, SCSI Id=7, 16 SCBs ahc0 waiting for scsi devices to settle ahc0: target 0 Tagged Queuing Device (ahc0:0:0): "QUANTUM VIKING 4.5 WSE 8808" type 0 fixed SCSI 2 sd0(ahc0:0:0): Direct-Access 4345MB (8899737 512 byte sectors) ahc1 rev 0 int a irq 10 on pci0:13 ahc1: aic7880 Wide Channel, SCSI Id=7, 16 SCBs ahc1 waiting for scsi devices to settle ahc1: target 1 Tagged Queuing Device (ahc1:1:0): "QUANTUM VIKING 2.3 WSE 8808" type 0 fixed SCSI 2 sd4(ahc1:1:0): Direct-Access 2171MB (4446801 512 byte sectors) ahc1: target 2 Tagged Queuing Device (ahc1:2:0): "QUANTUM VIKING 2.3 WSE 8808" type 0 fixed SCSI 2 sd5(ahc1:2:0): Direct-Access 2171MB (4446801 512 byte sectors) ahc1: target 3 Tagged Queuing Device (ahc1:3:0): "QUANTUM VIKING 2.3 WSE 8808" type 0 fixed SCSI 2 sd6(ahc1:3:0): Direct-Access 2171MB (4446801 512 byte sectors) ahc1: target 4 Tagged Queuing Device (ahc1:4:0): "QUANTUM VIKING 2.3 WSE 8808" type 0 fixed SCSI 2 sd7(ahc1:4:0): Direct-Access 2171MB (4446801 512 byte sectors)