Date: Wed, 15 Sep 2004 21:48:01 +0800 From: "fancalenno" <fancalenno@pchome.com.tw> To: <freebsd-questions@freebsd.org> Subject: problem with 1024 cylinders Message-ID: <001b01c49b2a$a1ea11e0$d620fea9@chivu>
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I have one IDE disk drive with 40GB I used the partition utility of win xp to make three partitions when I = was installing winxp. Its sequence is pri(xp)->ext(xp)->pri(bsd). I installed the xp on the first partition(pri) and put some personal = data on the next partition(ext). In the partition editor, I deleted(d) the third partition(pri) that I = had made, then created(c) a new BSD partition. Three partitions occupy 8GB. 16GB. 14GB in sequence respectively. After testing, both of win xp and FreeBSD can run normally with no = problem. ------------------ my question is ... does the FreeBSD still have the restriction that its = root file system must be installed in the first 1024 cylinders??? ------------------ a. http://www.freebsd.org/doc/en_US.ISO8859-1/articles/multi-os/ch3.html the document as above point out should put the root file system / into = the 1204 cylinders of the first disk drive otherwise bsd can't start = normally. b. The book" FreeBSD: An Open-Source Operating System for Your Personal = Computer" by Annelise Anderson say "FreeBSD needs a few of its = files(those in the / or 'slash' root file system)close enough to the = front of the drive so the computer can find them. And every other = operating system needs some files up front too..." I used partition magic to see the cylinder range of my bsd partition. = It indicated the cylinder range of bsd had already gone beyond the 1024 = cylinders!=20 But I still can use booteasy to start both of these two os. So I can't = figure out if the FreeBSD was really restricted by the 1024 cylinders??? ----- I think if it's about boot manager??? The common boot manager uses BIOS to start the os, but it's also = restricted by BIOS. The BIOS has the restriction that os can't be start if some files of = os(just as / of bsd)go beyond 1024 cylinders. But the booteasy doesn't use the BIOS, so it's not restricted by BIOS? I had ever used OS-BS to boot these two os, the xp can start normally = but the BSD can't. The pop up prompt window say"NO OPERATING SYSTEM!". = So I can't make sure if the factor"boot manager use BIOS or not" affects = the 1024 cylinders?
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