Date: Sun, 09 Dec 2001 16:43:50 -0800 From: Peter Wemm <peter@wemm.org> To: Joerg Wunsch <joerg_wunsch@uriah.heep.sax.de> Cc: freebsd-current@FreeBSD.ORG Subject: Re: cvs commit: src/sys/kern subr_diskmbr.c Message-ID: <20011210004350.6703C3810@overcee.netplex.com.au> In-Reply-To: <20011209102129.F97235@uriah.heep.sax.de>
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Joerg Wunsch wrote: > As Peter Wemm wrote: > > > There shouldn't *be* bootblocks on non-boot disks. > > > > dd if=/dev/zero of=/dev/da$n count=1 > > > > Dont use "disklabel -B -rw da$n auto". Use "disklabel -rw da$n auto". > > All my disks have bootblocks and (spare) boot partitions. All the > bootblocks are DD mode. I don't see any point in using obsolete fdisk > tables. (There's IMHO only one purpose obsolete fdisk tables are good > for, co-operation with other operating systems in the same machine. > None of my machines uses anything else than FreeBSD.) The problem is, that you **are** using fdisk tables, you have no choice. DD mode included a *broken* fdisk table that specified an illegal geometry. This illegal geometry was the reason why Thinkpad Laptops would wedge solid when you installed FreeBSD on it. This illegal geometry is the reason why FreeBSD disks wedge solid any EFI system unless you remove the illegal geometry tables. This illegal geometry causes divide by zero errors in a handful of scsi bioses from Adaptec. This illegal geometry causes divide by zero errors in a handful of scsi bioses from NCR/Symbios. This is why it is called dangerous. 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-current" in the body of the message
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