Date: Sun, 3 Dec 2000 23:21:00 -0600 From: "Zach N. Heilig" <zach@uffdaonline.net> To: "Justin T. Gibbs" <gibbs@scsiguy.com> Cc: Co-op <sparqy2@home.com>, freebsd-stable@FreeBSD.ORG, freebsd-bugs@FreeBSD.ORG Subject: Re: Old AHA-2940 problem [was: kernel panics in 4.2] Message-ID: <20001203232100.A11302@murkwood.znh.org> In-Reply-To: <28155B5C7DCC3B0451AD05D2@mail.uffdaonline.net>; from gibbs@scsiguy.com on Sun, Dec 03, 2000 at 09:15:15AM -0700 References: <3A2A6728.7D6698BA@home.com> <28155B5C7DCC3B0451AD05D2@mail.uffdaonline.net>
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On Sun, Dec 03, 2000 at 09:15:15AM -0700, Justin T. Gibbs wrote: > >Thanks Antonio, > >Looking at the 4.2 release notes, the ahc driver was updated. Wonder if the > >kernel guys made changes that made supporting the old bios's impossible. > > At the point that the kernel takes over control of the 2940, the BIOS > should be irrelevant. I'll see if I can scare up a 2940 of that > vintage and reproduce your problem. The probable cause is that we, > at some point during initialization, reference a piece of SCB ram > that has never been written to. I have one that seems to have this problem. ahc0: <Adaptec 2940 SCSI adapter> port 0xe400-0xe4ff mem 0xea101000-0xea101fff irq 10 at device 11.0 on pci0 aic7870: Single Channel A, SCSI Id=7, 16/255 SCBs The exact symptons I see: power-on boot: 4.2-stable: infinite loop (right before what would normally be 'Waiting 2 seconds for SCSI devices to settle' -- it's a multiple line panic message, so I can't read it (it scrolls far too fast). In -current: a regular page-not-present panic. This happens 100% of the time. in 4.2-stable, hitting reset (the only way to cause a reboot, without turning off the power) allows the next (and any other reboot, until power off) to succeed properly. in -current, I just need to wait for the automatic reboot. after a successful boot, devices on the ahc bus seem to be usable (I kept a FreeBSD cvs repository, /usr/src, /usr/ports, /usr/obj on drives attached to that controller, and didn't have problems running cvsup, cvs update, or make world. (past tense because I moved the entire chain to a symbios based card -- now I just need to find an inexpensive PCI SCSI card with a narrow external connector and I can ditch the ancient 2940 for good). -- Zach Heilig <zach@uffdaonline.net> To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-bugs" in the body of the message
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