Date: Tue, 26 Nov 2002 19:15:11 +0100 (MET) From: j@uriah.heep.sax.de (Joerg Wunsch) To: "Ronald F. Guilmette" <rfg@monkeys.com> Cc: freebsd-scsi@freebsd.org Subject: Re: Upgrade from Adaptec 2940UW to 29160N - Problem solved! Message-ID: <200211261815.gAQIFBnb058918@uriah.heep.sax.de> In-Reply-To: <83843.1038299380@monkeys.com> References: <83843.1038299380@monkeys.com>
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"Ronald F. Guilmette" <rfg@monkeys.com> wrote: > So I bought a used Adaptec 29160N (Ultra160) off eBay, swapped out > the old 2940UW and swapped in the 29160N. No go. Now the FreeBSD > BootManager refused to boot from my one and only partition on the > drive. It would just prompt me enticingly with that "F1" prompt > but then just beep whenever I tried to hit return or the F1 key. Welcome to the wonderful world of the prehistoric "fdisk" table. Now you might know why we introduced "dangerously dedicated mode" ages ago, where there is no true fdisk table, but instead the BSD disk label right away in block #0. (There's a fake fdisk table still, but nobody cares about that.) That way, the disk is portable between whatever "geometry" the BIOS implementation might believe into, since the very first 15 or so blocks are basically always located at the same coordinates, irrespective of the "geometry" imposed. I'm surprised that even different Adaptec controllers now start to experience that geometry mishmash. Previously, this was only a known symptom when migrating a disk from a Symbios Logic based controller to an Adaptec one. -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message
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