Date: Thu, 5 Aug 1999 16:51:39 -0700 (PDT) From: phillip@www4.au.freebsd.org To: freebsd-gnats-submit@freebsd.org Subject: i386/12993: "ahc0: Data Parity Error Detected during address or write data phase" kernel message Message-ID: <19990805235139.A10F215639@hub.freebsd.org>
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>Number: 12993 >Category: i386 >Synopsis: "ahc0: Data Parity Error Detected during address or write data phase" kernel message >Confidential: no >Severity: non-critical >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Aug 5 17:00:00 PDT 1999 >Closed-Date: >Last-Modified: >Originator: Phillip Musumeci >Release: FreeBSD 3.2 RELEASE >Organization: RMIT University >Environment: FreeBSD josephine.net.at.home 3.2-RELEASE FreeBSD 3.2-RELEASE #0: Sat Jul 24 23:54:55 EST 1999 phillip@josephine.net.at.home:/usr/src/sys/compile/barton i386 >Description: I was getting errors messages from the ahc driver, for a card that was probed as ahc0: <Adaptec 2940 Ultra SCSI adapter> rev 0x00 int a irq 11 on pci0.8.0 ahc0: aic7880 Wide Channel A, SCSI Id=7, 16/255 SCBs (adaptec 2940UW) and with a Seagate SCSI UW disk probed as da0: <SEAGATE ST36530W 1487> Fixed Direct Access SCSI-2 device da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled da0: 6208MB (12715920 512 byte sectors: 255H 63S/T 791C) I found that these warning messages could be stopped by making sure that the PC BIOS allocated a unique interrupt to the PCI SCSI adaptec card. Previously, the BIOS was allocating the same interrupt to the apdaptec card as was being allocated to some other PCI cards. >How-To-Repeat: With the adaptec 2940UW card sharing an IRQ with other cards: the kernel warning messages appear. >Fix: Configure your PC's BIOS to have at least two IRQs allocated to the PCI bus if you have a 2940UW and other PCI cards needing an IRQ. In my case, my FIC VA503+ motherboard's bios will then allocate an IRQ for sole use by the 2940UW card and all is fine. Hope this helps others. >Release-Note: >Audit-Trail: >Unformatted: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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