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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!nntp.coast.net!news.kei.com!news.mathworks.com!fu-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: How to add a new SCSI drive? Date: 23 Dec 1995 08:45:50 GMT Organization: Private BSD site, Dresden Lines: 51 Message-ID: <4bgfju$lij@uriah.heep.sax.de> References: <4b8cik$40j@newsnewsnews> <4ba4fq$bls@uriah.heep.sax.de> <4bf3am$jd@tzlink.j51.com> 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 0.9.3 lepslog@j51.com (Louis Epstein) writes: > : You should > > : n e v e r > > : use the block device unless you're going to mount a file system. > > Hmmm...but would you add a disk without making any partitions? Nope, but how's this related? The actual partitioning is done by the disktab entry: traditionally, the `c' partition covers the entire disk (or slice, if that matters), the `b' partition is magic in that's reserved for a paging area. The remaining partitions are freely usable, although partition `a' used to be reserved for a (potential) root file system. So you always have to make at least two partitions: `c', and one that you're actually going to use. (Hmm, i think you could also newfs the `c' partition, but that's not considered `good style'.) So the minimum disktab entry looks like: m2934s|Fujitsu M2934S:\ :ty=winchester:dt=SCSI:su#8506782:\ <<== capacity in sectors :oc#0:pc#8506782:\ :oh#0:ph#8506782:th=4.2BSD:fh#1024:bh#8192: It consists out of a single useable partition `h', covering the entire disk (4153 MB). The capacity in sectors (su# value) is what you see here: (bt0:1:0): "FUJITSU M2934S-512 0110" type 0 fixed SCSI 2 sd1(bt0:1:0): Direct-Access 4153MB (8506782 512 byte sectors) ^^^^^^^ You don't necessarily need any sectors/track, cylinders etc. values, just su# is sufficient. Final word: there are several ideas on how to simplify this process. But the above should work at least for every 2.0.5 or more recent FreeBSD. -- 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. ;-)