From owner-freebsd-questions@FreeBSD.ORG Tue Nov 27 03:10:29 2012 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id D0BE2F91 for ; Tue, 27 Nov 2012 03:10:29 +0000 (UTC) (envelope-from rfg@tristatelogic.com) Received: from outgoing.tristatelogic.com (segfault.tristatelogic.com [69.62.255.118]) by mx1.freebsd.org (Postfix) with ESMTP id A96E48FC0C for ; Tue, 27 Nov 2012 03:10:29 +0000 (UTC) Received: from segfault-nmh-helo.tristatelogic.com (localhost [127.0.0.1]) by segfault.tristatelogic.com (Postfix) with ESMTP id D18195081A for ; Mon, 26 Nov 2012 19:10:27 -0800 (PST) To: freebsd-questions@freebsd.org Subject: Advanced Format Drive ? Date: Mon, 26 Nov 2012 19:10:27 -0800 Message-ID: <19362.1353985827@tristatelogic.com> From: "Ronald F. Guilmette" X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 Nov 2012 03:10:29 -0000 I just wanted to add another data point... in case anybody is interested... uring my recent spending binge, I also acquired a Hatachi portable external 2.5 inch "Touro Moble" 500GB drive. Righ out of the box, this is what fdisk tells me about this one: ========================================================================== ******* Working on device /dev/da1 ******* parameters extracted from in-core disklabel are: cylinders=60801 heads=255 sectors/track=63 (16065 blks/cyl) Figures below won't work with BIOS for partitions not in cyl 1 parameters to be used for BIOS calculations are: cylinders=60801 heads=255 sectors/track=63 (16065 blks/cyl) Media sector size is 512 Warning: BIOS sector numbering starts with sector 1 Information from DOS bootblock is: The data for partition 1 is: sysid 7 (0x07),(NTFS, OS/2 HPFS, QNX-2 (16 bit) or Advanced UNIX) start 2048, size 976766976 (476937 Meg), flag 0 beg: cyl 0/ head 32/ sector 33; end: cyl 1023/ head 254/ sector 63 The data for partition 2 is: The data for partition 3 is: The data for partition 4 is: ========================================================================== I can't help but note that both this one and also my new Seagate 2.5" portable external 1TB drive are pre-partitioned with one partition that in both cases starts at sector 2048. I suppose that it is no coincidence that 2048 * 512B == 1 megabyte, exactly.