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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.uwa.edu.au!disco.iinet.net.au!news.uoregon.edu!vixen.cso.uiuc.edu!newsfeed.internetmci.com!news.mathworks.com!fu-berlin.de!zrz.TU-Berlin.DE!zib-berlin.de!irz401!uriah.heep!news From: j@uriah.heep.sax.de (J Wunsch) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: HELP - unable to boot after install Date: 28 May 1996 21:48:58 GMT Organization: Private BSD site, Dresden Lines: 24 Message-ID: <4ofsca$f8d@uriah.heep.sax.de> References: <31A8FBF2.2DD3@ucla.edu> <31AAD201.3477@ucla.edu> Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) NNTP-Posting-Host: localhost.heep.sax.de Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Newsreader: knews 0.9.6 X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E Hook Hua <hookh@ucla.edu> wrote: > The whole HDD is devoted to FreeBSD. Why does FreeBSD allocate the first > 39 sectors or so on the HDD and then use sector 39 and on for the > FreeBSD partition...is that where the MBR goes I presume. No, the MBR is -- as the name's suggesting -- a master boot _record_, i.e. a single sector (512 bytes). DOS convention however demands that fdisk partitions start at track or even cylinder boundaries. FreeBSD defaults to this mode, unless you're using ``dangerously dedicated'' mode (use A)ll in the partition editor, but use the non-default un-cooperative variant), in which case the BSD disklabel and the MBR are the same (at sector 0). You ought to understand what you're doing however when selecting this (e.g. disklabel -B used to clobber the fdisk table in 2.1R). -- 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. ;-)