From owner-freebsd-fs Wed Aug 26 10:32:03 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id KAA08446 for freebsd-fs-outgoing; Wed, 26 Aug 1998 10:32:03 -0700 (PDT) (envelope-from owner-freebsd-fs@FreeBSD.ORG) Received: from smtp04.primenet.com (smtp04.primenet.com [206.165.6.134]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id KAA08421 for ; Wed, 26 Aug 1998 10:31:54 -0700 (PDT) (envelope-from tlambert@usr02.primenet.com) Received: (from daemon@localhost) by smtp04.primenet.com (8.8.8/8.8.8) id KAA26967; Wed, 26 Aug 1998 10:31:00 -0700 (MST) Received: from usr02.primenet.com(206.165.6.202) via SMTP by smtp04.primenet.com, id smtpd026905; Wed Aug 26 10:30:51 1998 Received: (from tlambert@localhost) by usr02.primenet.com (8.8.5/8.8.5) id KAA10855; Wed, 26 Aug 1998 10:30:39 -0700 (MST) From: Terry Lambert Message-Id: <199808261730.KAA10855@usr02.primenet.com> Subject: Re: question about msdosfs file system To: hiren@tagore.wipinfo.soft.net (Hiren Mehta) Date: Wed, 26 Aug 1998 17:30:38 +0000 (GMT) Cc: freebsd-fs@FreeBSD.ORG In-Reply-To: from "Hiren Mehta" at Aug 26, 98 12:55:44 pm X-Mailer: ELM [version 2.4 PL25] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-fs@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org > Hi All, > > In case of MSDOS formatted device, is there any guarantee that the > files are will start on 8192 bytes boundary of the device ? No. There is neither a guarantee that it will start on a 4096 byte boundary, a 2048, or a 1024. There *is* a guarantee that it will start on a 512 byte boundary. In general, where it starts depends on the C:H:S geometry of the device; specifically, DOS likes to write the DOS partition table to place the DOS partitions to start and end on cylinder boundaries. This means that for a default DOS device, where the first partition is not munged by an ill-informed "do-gooder", it will start at the 0 + S * H'th sector. Obviously, this can be on any boundary, whatsoever, based on the values of H and S. Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message