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Date: Tue, 17 Apr 2012 10:49:56 +0200
From: Rainer Hurling <rhurlin@gwdg.de>
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Cc: matt <sendtomatt@gmail.com>,
	"O. Hartmann" <ohartman@mail.zedat.fu-berlin.de>,
	ken@freebsd.org, freebsd-current@freebsd.org,
	Konstantin Belousov <kostikbel@gmail.com>,
	"Conrad J. Sabatier" <conrads@cox.net>
Subject: Re: Kernel builds, but crashes at boot (amd64, Revision: 234306)
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Am 17.04.2012 03:53 (UTC+1) schrieb Edward Tomasz Napierała:
> Wiadomość napisana przez Rainer Hurling w dniu 16 kwi 2012, o godz. 19:58:
>> On 16.04.2012 19:31 (UTC+1), Konstantin Belousov wrote:
>>> On Mon, Apr 16, 2012 at 06:15:32PM +0200, Rainer Hurling wrote:
>>>>
>>>> I just updated my system to r234342, only downgraded
>>>> /usr/src/sys/cam/scsi/scsi_da.c to r233746, and now the system is
>>>> booting again. So obviously there is something wrong with the newest
>>>> patch to  scsi_da.c.
>>> It is too broad, try to revert exactly one patch and see whether it works.
>>
>> Sorry for my bad english. I wanted to say, that I only reverted exactly one patch (file scsi_da.c from 234177 back to 233746 manually). The rest is up to r234342.
>
> Could you try the patch below?
>
> Index: sys/cam/scsi/scsi_da.c
> ===================================================================
> --- sys/cam/scsi/scsi_da.c	(revision 234314)
> +++ sys/cam/scsi/scsi_da.c	(working copy)
> @@ -938,7 +938,9 @@ daopen(struct disk *dp)
>   	if (error != 0)
>   		xpt_print(periph->path, "unable to retrieve capacity data");
>
> -	if (periph->flags&  CAM_PERIPH_INVALID)
> +	if (periph->flags&  CAM_PERIPH_INVALID ||
> +	    softc->disk->d_sectorsize == 0 ||
> +	    softc->disk->d_mediasize == 0)
>   		error = ENXIO;
>
>   	if (error == 0&&  (softc->flags&  DA_FLAG_PACK_REMOVABLE) != 0&&
>
>

Thanks for the patch. I just tried it with 10.0-CURRENT (amd64) r234370 
and it at least boots again.