From owner-freebsd-questions Thu Jul 20 13:42:26 1995 Return-Path: questions-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.11/8.6.6) id NAA22572 for questions-outgoing; Thu, 20 Jul 1995 13:42:26 -0700 Received: from tellab5.lisle.tellabs.com (tellab5.lisle.tellabs.com [138.111.243.28]) by freefall.cdrom.com (8.6.11/8.6.6) with SMTP id NAA22562 for ; Thu, 20 Jul 1995 13:42:24 -0700 Received: from genesis by tellab5.lisle.tellabs.com with smtp (Smail3.1.29.1 #4) id m0sZ28i-000jCKC; Thu, 20 Jul 95 15:24 CDT Message-Id: From: mikebo@tellabs.com (Mike Borowiec) Subject: Re: FreeBSD 2.0 / 2.05 filesystems compatibility To: didier@omnix.fr.org Date: Thu, 20 Jul 1995 15:24:06 -0500 (CDT) Cc: questions@freebsd.org X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Length: 1640 Sender: questions-owner@freebsd.org Precedence: bulk Didier Derny wrote: > is FreeBSD 2.05 able to read a FreeBSD 2.0 file system ? > > Thanks for your help > Yes, it will read and write... but I did notice that the kernel complains about the geometry when you do the mount. Perhaps someone can elaborate about the difference in handling the disk geometry. Specifically (regarding SCSI disk at least): o Why does the 2.0.5 kernel complain about partition/disk size mismatch when mounting a partition created by 2.0? o Why does 2.0.5 require you to use the DOS geometry (where the numbers are fudged so that 1 MB = 1 cylinder) as opposed to 2.0 which used the actual disk geometry as stored in /etc/disktab? o Why is there a small blob of disk space left over in the install partition utility? o How is the -u argument to newfs computed in the install utility? It uses some fairly bizarre numbers which are obviously optimized to waste as little space as possible at the end of the filesystem. Also, several people have written to the hackers list compaining about the lack of decent fdisk/partitioning utilities in the OS. I agree, but I've just been using the boot disk utility, and reseting the machine after the newfses are done. Clunky, but in a pinch... - Mike -- -------------------------------------------------------------------------- Michael Borowiec Network Operations Tellabs Operations, Inc. mikebo@TELLABS.COM 1000 Remington Blvd. MS109 708-378-6007 FAX: 708-378-6714 Bolingbrook, IL, USA 60440 --------------------------------------------------------------------------