From owner-freebsd-hackers Sat Nov 17 17:52:23 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from peter3.wemm.org (c1315225-a.plstn1.sfba.home.com [24.14.150.180]) by hub.freebsd.org (Postfix) with ESMTP id B0D6C37B405 for ; Sat, 17 Nov 2001 17:52:19 -0800 (PST) Received: from overcee.netplex.com.au (overcee.wemm.org [10.0.0.3]) by peter3.wemm.org (8.11.0/8.11.0) with ESMTP id fAI1qJM35855 for ; Sat, 17 Nov 2001 17:52:19 -0800 (PST) (envelope-from peter@wemm.org) Received: from wemm.org (localhost [127.0.0.1]) by overcee.netplex.com.au (Postfix) with ESMTP id 568D338CC; Sat, 17 Nov 2001 17:52:19 -0800 (PST) (envelope-from peter@wemm.org) X-Mailer: exmh version 2.5 07/13/2001 with nmh-1.0.4 To: Doug White Cc: Matthew Emmerton , Sandeep Joshi , hackers@FreeBSD.ORG Subject: Re: Tracking down "BTX halted" In-Reply-To: Date: Sat, 17 Nov 2001 17:52:19 -0800 From: Peter Wemm Message-Id: <20011118015219.568D338CC@overcee.netplex.com.au> Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Doug White wrote: > On Fri, 16 Nov 2001, Matthew Emmerton wrote: > > > > There is a bug in Adaptec BIOSen that they will not tolerate DD disks. > > > > Which controllers have this bug? I've got a whole bunch of 7880 and 79xx > > controllers with disks running in DD mode and never have had this problem. > > Happens to me on L440GX+ boards. It happens randomly all over the place. I think it also depends on the default bios settings too.. ie: whether you've got Large Drive support on or off, and what mode it is in. FWIW, this puts a legal geometry back into boot1: +++ boot1.s 2001/11/18 01:42:26 @@ -353,7 +353,7 @@ .fill 0x30,0x1,0x0 part4: .byte 0x80, 0x00, 0x01, 0x00 - .byte 0xa5, 0xff, 0xff, 0xff + .byte 0xa5, 0xfe, 0xff, 0xff # 1023 cyl, 255 heads, 63 sec .byte 0x00, 0x00, 0x00, 0x00 .byte 0x50, 0xc3, 0x00, 0x00 # 50000 sectors long, bleh But that stops the MBR kernel code from recognizing it as a bogus DD table and it will try to interpret it, thinking that you only have a 25 meg drive. I wish we could take this crud out with a shotgun. If somebody is going to boot off a disk, obey the rules with a real MBR and fdisk table. If somebody doesn't want a fdisk table, then dont fudge around with a fake one, and dont pretend that it is bootable. Cheers, -Peter -- Peter Wemm - peter@FreeBSD.org; peter@yahoo-inc.com; peter@netplex.com.au "All of this is for nothing if we don't go to the stars" - JMS/B5 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message