Date: Wed, 3 Jan 1996 09:46:12 +0100 (MET) From: J Wunsch <j@uriah.heep.sax.de> To: freebsd-hackers@freebsd.org (FreeBSD hackers) Subject: Re: HELP!!! THIS IS AN EMERGENCY (fwd) Message-ID: <199601030846.JAA19346@uriah.heep.sax.de> In-Reply-To: <199601022249.PAA12933@phaeton.artisoft.com> from "Terry Lambert" at Jan 2, 96 03:49:12 pm
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As Terry Lambert wrote: > > > When I select FreeBSD it boots and runs fine. I assume the ON TRACK code > > is still being used for the IDE interface, but this doenst seem to be a Nope, it is not, but FreeBSD noticed the OnTrack, and places itself 64 sectors behind. It then operates with the actual sector numbers instead of OnTrack's. (Disclaimer: i don't use IDEs, that's only the way how i understood it.) > > problem. This system gets most of its real stuff over NFS so a small disk > > was used. I was careful to get both Boot partitions under the 500M limit. > > Right. See above. > > The 500M limit comes from the BSD inability to talk to the controller > using an LBA adressing mechanism. The BSD *does* see the OnTrack and > do the 64 sector offsetting. BSD does not have a 500 MB limit. It can speak whatever the hardware allows for, this is c<=65535, h<=15, s<=255. For disks that are used in a BIOS environment as well, the `s' limit is 63 however. This would still account for 65536*16*31 = 32505856 blocks, or 15872 MB. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)
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