Date: Wed, 11 May 2005 15:05:35 +0900 From: Joel <rees@ddcom.co.jp> To: freebsd-questions@freebsd.org Subject: Re: Boot loader doesn't see [root filesystem on] ATA disk after successful install Message-ID: <20050511143459.172E.REES@ddcom.co.jp> In-Reply-To: <20050511052328.2076.qmail@web50902.mail.yahoo.com> References: <20050511052328.2076.qmail@web50902.mail.yahoo.com>
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On Tue, 10 May 2005 22:23:28 -0700 (PDT) Brian O'Shea <b_oshea@yahoo.com> wrote > [...] > There is a boot loader installed in the MBR of both disks, but I am > trying to boot the IDE disk from the loader on its own MBR. I didn't > try booting the loader from the SCSI disk and then having it try to > boot the IDE disk, but I don't think it would make a difference. I'll > give it a try tomorrow though, just for the sake completeness. (BFrom what little I've seen, it could be worth a try if you have the time. > [...] > It can boot from the CD-ROM drive, which is on the same ATA controller. > I have both the IDE disk and the CD-ROM drive set to cable select for > their master/slave configuration. Could this be the problem? I am told that cable select is more reliable with modern cables, less reliable with older cables. (UDMA being modern if I recall correctly.) You can search the web on "UDMA cable" to get quite a bit of information on the cabling and positioning issues. There's a site called, I think, pcguide, that is quite helpful. > I'll > try explicitly setting the IDE disk to master and CD-ROM to slave. (BFrom what I've read and what I've experienced, putting hard disks and CD-ROMs on the same channel is counterproductive. Boot problems and data problems are said to be likely on many controller and drive combinations. > > If you can boot from the SCSI, check the dmesg there to see whether the > > ATA controller is recognized by the older system. That wouldn't give an > > absolute answer, but might yield a clue. > > The older system can see the CD-ROM drive, so it must be recognizing the > ATA controller. I'll post the relevant dmesg output tomorrow though. > > > I hear that it's usually best to just let freeBSD's formatting utilities > > do what they think they should and not try to meddle with that. > > Oh, well. Too late for that! Maybe I can set it back to the old > values. When I was trying to set the geometry by hand, I found that fdisk and disklabel would go back to the geometry they thought was best. > However, when I changed the geometry to what the BIOS thought > was correct, the reported disk size was closer to the advertised size. > In both cases though the symptom was the same. I thought I noticed something like that happen at one point while trying to set the geometry by hand, but I dom't remember the details. -- Joel Rees <rees@ddcom.co.jp> digitcom, inc. $B3t<02q<R%G%8%3%`(B Kobe, Japan +81-78-672-8800 ** <http://www.ddcom.co.jp>; **
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