Date: Fri, 14 Sep 2001 11:02:57 -0700 (PDT) From: John Baldwin <jhb@FreeBSD.org> To: Mike Smith <msmith@freebsd.org> Cc: freebsd-hackers@FreeBSD.org, rnordier@FreeBSD.org, Peter Pentchev <roam@ringlet.net> Subject: Re: Does boot1 still have a > 1023 cyl limit? Message-ID: <XFMail.010914110257.jhb@FreeBSD.org> In-Reply-To: <200109141650.f8EGoN501078@mass.dis.org>
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On 14-Sep-01 Mike Smith wrote: >> A quote from the end of the boot_i386.8 manual page.. >> >> IMPORTANT NOTE: Because of limitations imposed by the conventional disk >> interface provided by the BIOS, all boot-related files and structures >> (including the kernel) that need to be accessed during the boot phase >> must reside on the disk at or below cylinder 1023 (as the BIOS under- >> stands the geometry). When a ``Disk error 0x1'' is reported by the sec- >> ond-stage bootstrap, it generally means that this requirement has not >> been adhered to. >> >> Just today I had a friend ask me if this is still true; I checked CVS >> history and found out that this comment was added by rnordier more than >> two years ago. Is this still true? > > No; it's quite possible now to boot from beyond the 1024 cylinder mark, > however boot0 does not install in 'packet' mode by default, which means > that you need to manually install/configure it before rebooting after > system installation. > > So we don't cleanly install for > 1024 cylinders, but it works with a > little tweaking. Actually, sysinstall has a hack to turn on EDD (aka packet mode) support if the drive has > 1024 cylinders. -- John Baldwin <jhb@FreeBSD.org> -- http://www.FreeBSD.org/~jhb/ PGP Key: http://www.baldwin.cx/~john/pgpkey.asc "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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