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Date:      Wed, 12 Jan 2000 23:17:47 -0600
From:      Brad Guillory <round@baileylink.net>
To:        freebsd-current@freebsd.org
Subject:   Re: kernel panics when initializing aic7895 controller at startup.
Message-ID:  <20000112231746.A86402@baileylink.net>
In-Reply-To: <Pine.BSF.4.10.10001100216001.321-100000@pauling.research.devcon.net>; from cc@devcon.net on Mon, Jan 10, 2000 at 02:21:54AM %2B0100
References:  <Pine.BSF.4.10.10001100216001.321-100000@pauling.research.devcon.net>

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I have a similar problem, in kernels build Monday and yesterday.  I get 
a kernel panic when while booting, I don't know how to capture the boot
messages to a file (do you) so I can not post them but this is the line
 that it dies on:

panic: ahc0: brkadrint, scratch or SCB Memory Parity Error at seqaddr=0x0

my machine initializes ahc0 with this line earlier in the boot:
ahc0 port 0xe800-0xe8ff mem 0xfebce000-0xfebcefff irq 10 @ device 15.0 on pci0
there is a similar line for ahc1.

My kernel from 12/12/99 reports this:
ahc0: <Adaptec aic7895 Ultra SCSI adapter> irq 10 at device 15.0 on pci0
ahc0: aic7895 Wide Channel A, SCSI Id=7, 255 SCBs
ahc1: <Adaptec aic7895 Ultra SCSI adapter> irq 11 at device 15.1 on pci0
ahc1: aic7895 Wide Channel B, SCSI Id=7, 255 SCBs

Does anyone have a workaround?


BMG

On Mon, Jan 10, 2000 at 02:21:54AM +0100, Christian Carstensen wrote:
> 
> hi,
> 
> with the latest changes to src/sys/pci/pci_ahc.c (partity error handling),
> i'm unable to boot a current kernel, because of panic during system boot.
> 
> i've attached dmesg from a working kernel version (2000/01/06) to this
> mail. marked with (***) you'll find the line, where (with the new kernel)
> the error message 
> "ahc0: brkadrintr, Data-path Parity Error at seqaddr = 0x14e"
> occurs.
> 
> any ideas, that could help?
> 
> --
>  Christian
> 
> ...
> ahc0: <Adaptec aic7895 Ultra SCSI adapter> irq 16 at device 18.0 on pci0
> ahc0: aic7895 Wide Channel A, SCSI Id=7, 16/255 SCBs
> ahc1: <Adaptec aic7895 Ultra SCSI adapter> irq 16 at device 18.1 on pci0
> ahc1: aic7895 Wide Channel B, SCSI Id=7, 16/255 SCBs
> ...
> Waiting 5 seconds for SCSI devices to settle
> SMP: AP CPU #1 Launched!
> da1 at ahc0 bus 0 target 2 lun 0
> da1: <QUANTUM FIREBALL1080S 1Q09> Fixed Direct Access SCSI-2 device 
> da1: 10.000MB/s transfers (10.000MHz, offset 8)
> da1: 1042MB (2134305 512 byte sectors: 64H 32S/T 1042C)
> Mounting root from ufs:/dev/da0a
> da0 at ahc0 bus 0 target 0 lun 0
> da0: <IBM OEM 0662S12 1011> Fixed Direct Access SCSI-2 device 
> da0: 10.000MB/s transfers (10.000MHz, offset 15), Tagged Queueing Enabled
> da0: 1003MB (2055035 512 byte sectors: 64H 32S/T 1003C)
> cd0 at ahc0 bus 0 target 4 lun 0
> cd0: <YAMAHA CRW4416S 1.0f> Removable CD-ROM SCSI-2 device 
> cd0: 8.333MB/s transfers (8.333MHz, offset 15)
> cd0: Attempt to query device size failed: NOT READY, Medium not present - tray closed
> da2 at ahc1 bus 0 target 0 lun 0
> da2: <IBM DCAS-34330W S65A> Fixed Direct Access SCSI-2 device 
> da2: 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
> da2: 4134MB (8467200 512 byte sectors: 64H 32S/T 4134C)
> 
> 
> 
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