Date: Mon, 26 Sep 2011 21:29:18 -0700 From: Kevin Oberman <kob6558@gmail.com> To: Adrian Chadd <adrian@freebsd.org> Cc: Gary Palmer <gpalmer@freebsd.org>, freebsd-current@freebsd.org, Benjamin Kaduk <kaduk@mit.edu>, Arnaud Lacombe <lacombar@gmail.com> Subject: Re: Experiences with FreeBSD 9.0-BETA2 Message-ID: <CAN6yY1uM6p21D=9MhAJ47hVWqDyh2bs6Ej_-X-sYBVwRvryfGw@mail.gmail.com> In-Reply-To: <CAJ-Vmo=7VvvBNo12Cx062coqDLJp5NCxfkyPbSZ6dGURwoPWaw@mail.gmail.com> References: <201109260053.SAA25795@lariat.net> <201109260927.02540.jhb@freebsd.org> <alpine.GSO.1.10.1109261359100.882@multics.mit.edu> <201109262035.OAA17199@lariat.net> <CACqU3MUZ_ez-KMGVR33Aqz31i9cE%2BW7ANtvhqy3D%2BiPfroFpxA@mail.gmail.com> <alpine.GSO.1.10.1109261941050.882@multics.mit.edu> <CAJ-Vmon39xorsCZQ9u8D310t-T%2BoDJm2s2aRbJQ2UH5u_QwiXw@mail.gmail.com> <CACqU3MWtx3JjvpXrQtqjpYbsuytGj5YBA52CEujgw9dZE5Z1Ug@mail.gmail.com> <20110927021559.GF57708@in-addr.com> <CAJ-Vmo=7VvvBNo12Cx062coqDLJp5NCxfkyPbSZ6dGURwoPWaw@mail.gmail.com>
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On Mon, Sep 26, 2011 at 7:20 PM, Adrian Chadd <adrian@freebsd.org> wrote: > .. I'm allowed to make mistakes you know. The point was, 7+1 > partitions isn't a lot. :) Just in case someone new is reading this and getting confused. I believe those taking part mostly understand this as well as or better than I do. MBR allows 4 slices (which Windows and most of the world call partitions). Windows also allows the creation of "Extended Partitions, but FreeBSD does not support these. They result in device named with an 's' for slice. E.g. "da0s1". BSDlabel will subdivide what FreeBSD calls a slice into a number of what FreeBSD calls partitions. Each is tagged with a single letter. E.g. "da0s1a". You can have up to 8 partitions, but 'c' isgenerally reserved for the whole slice, so you really have 7+1 or 7 useful partitions. Under GPT, partitions are partitions and you can have 128 of them. (I previously said 256. 128 is correct. Sorry. They are denoted by appending 'p' for partition followed by the number of the partition index which starts with '1'. E.g. "da0p1". gpart(8) will support both MBR and GPT structures., but to deal with MBR disks, you "slice" the disk to create slices and then partition the slices. -- R. Kevin Oberman, Network Engineer - Retired E-mail: kob6558@gmail.com
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