From owner-freebsd-fs Thu Oct 28 1:51:41 1999 Delivered-To: freebsd-fs@freebsd.org Received: from vader.cs.berkeley.edu (vader.CS.Berkeley.EDU [128.32.38.234]) by hub.freebsd.org (Postfix) with ESMTP id B8AF914CD4 for ; Thu, 28 Oct 1999 01:51:39 -0700 (PDT) (envelope-from asami@stampede.cs.berkeley.edu) Received: from silvia.hip.berkeley.edu (silvia [209.109.233.59]) by vader.cs.berkeley.edu (8.9.3/8.9.3) with ESMTP id BAA02862; Thu, 28 Oct 1999 01:43:08 -0700 (PDT) (envelope-from asami@stampede.cs.berkeley.edu) Received: (from asami@localhost) by silvia.hip.berkeley.edu (8.9.3/8.6.9) id BAA05958; Thu, 28 Oct 1999 01:43:01 -0700 (PDT) To: "Kenneth D. Merry" Cc: don@calis.blacksun.org (Don), ticso@cicely.de (Bernd Walter), grog@lemis.com (Greg Lehey), bright@wintelcom.net (Alfred Perlstein), freebsd-fs@FreeBSD.ORG Subject: Re: Journaling References: <199910280305.VAA13281@panzer.kdm.org> From: asami@FreeBSD.ORG (Satoshi - Ports Wraith - Asami) Date: 28 Oct 1999 01:42:58 -0700 In-Reply-To: "Kenneth D. Merry"'s message of "Wed, 27 Oct 1999 21:05:04 -0600 (MDT)" Message-ID: Lines: 17 X-Mailer: Gnus v5.7/Emacs 20.4 Sender: owner-freebsd-fs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org * From: "Kenneth D. Merry" * It has been that way for a long time. I'm not sure why the limit is 8, but * it is. (Someone might know. I suspect it was just an arbitrary value * chosen a long time ago.) Changing it might break backwards compatibility, * though. It's because there were only 8 bits in the device minor number. They decided to divide that into 5 bits for the device ID (giving us 32 disks of the same type) and 3 bits for partition ID (8 partitions). Since then, we've added 16 more bits to the device numbers but none of them were allocated to partitions.... (See the comment near the bottom of /usr/include/sys/disklabel.h.) Satoshi To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message