Date: Tue, 19 Aug 1997 23:04:57 -0500 From: Raul Zighelboim <mango@staff.communique.net> To: "'Justin T. Gibbs'" <gibbs@plutotech.com>, Greg Lehey <grog@lemis.com> Cc: FreeBSD SCSI Mailing List <freebsd-scsi@FreeBSD.ORG> Subject: RE: Bus resets. Grrrr. Message-ID: <A03CD00C69B1D01195AB00A024ECEB162AB839@kaori.communique.net>
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> 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 <Adaptec 2940 Ultra SCSI host adapter> 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 <Adaptec 2940 Ultra SCSI host adapter> 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)
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