Date: Wed, 6 Dec 2000 22:17:23 +0100 (CET) From: =?ISO-8859-1?Q?G=E9rard_Roudier?= <groudier@club-internet.fr> To: Dan Langille <dan@langille.org> Cc: David Kelly <dkelly@hiwaay.net>, freebsd-scsi@FreeBSD.ORG Subject: Re: sym SCSI card problems during settle wait Message-ID: <Pine.LNX.4.10.10012062157320.390-100000@linux.local> In-Reply-To: <200012062132.KAA20067@ducky.nz.freebsd.org>
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On Thu, 7 Dec 2000, Dan Langille wrote: > On 6 Dec 2000, at 15:30, David Kelly wrote: >=20 > > On Thu, Dec 07, 2000 at 09:22:31AM +1300, Dan Langille wrote: > > > On 6 Dec 2000, at 20:14, G=E9rard Roudier wrote: > > >=20 > > > > You must check that JP1/JP2 are configured for PCI INTA, which is n= ormally > > > > the default setting. > > >=20 > > > I checked it. It's set to INTA. Thanks. Could there be a correspon= ding=20 > > > item in the BIOS? > >=20 > > Dan, you did check that nothing was on IRQ 2 as IRQ 9 is really > > IRQ 2? >=20 > At the suggestion of someone offlist, I've had success with 3.5- > RELEASE boot disks. Now I'm putting the disks back into the box to=20 > do a proper install. Watch this space. In 3.5, it was probably the `ncr' driver and not the `sym' that attached your SCSI card. The `ncr' uses a clock and timely polls the interrupt status register of the PCI-SCSI chip. This was probably intended to reap lost interrupts in early time of broken PCI bridging implementations. But this has also the effect of silently band-aiding chips that have interrupt wiring misconfigured or just broken. The `sym' driver hasn't such an interrupt reaping clock. I donnot want unaware user to run such band-aiding for years instead of having caught and fixed such INT problem on day one. Instead, dummy PCI reads are theorically in proper place in both SCSI scripts and C codes for not losing interrupts in presence of posted transactions (not too broken PCI-HOST bridges assumed). This works so since 5 years under Linux, btw. G=E9rard. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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