From owner-freebsd-hackers Sun Jan 21 10:27:59 1996 Return-Path: owner-hackers Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id KAA29065 for hackers-outgoing; Sun, 21 Jan 1996 10:27:59 -0800 (PST) Received: from brasil.moneng.mei.com (brasil.moneng.mei.com [151.186.109.160]) by freefall.freebsd.org (8.7.3/8.7.3) with ESMTP id KAA29047 Sun, 21 Jan 1996 10:27:52 -0800 (PST) Received: (from jgreco@localhost) by brasil.moneng.mei.com (8.7.Beta.1/8.7.Beta.1) id MAA26034; Sun, 21 Jan 1996 12:27:14 -0600 From: Joe Greco Message-Id: <199601211827.MAA26034@brasil.moneng.mei.com> Subject: Re: ccd driver or 2.1R available To: tom@uniserve.com (Tom Samplonius) Date: Sun, 21 Jan 1996 12:27:13 -0600 (CST) Cc: jgreco@brasil.moneng.mei.com, hackers@freebsd.org, stable@freebsd.org In-Reply-To: from "Tom Samplonius" at Jan 19, 96 02:25:01 pm X-Mailer: ELM [version 2.4 PL24] Content-Type: text Sender: owner-hackers@freebsd.org Precedence: bulk > As far as I can tell from the manpage, the reason is that the ccd > disklabel could be mistaken by the system as the disk's label, because > they are in the same spot. The first bit of every partition has space > reserved for the label, but ccd will not reserve space. > > I believe swap will not work as the first partition on a disk for the > same reason, except that swap will overwrite the label! Well, I left the first cylinder empty and I've been running for 22 hours now having striped two disks for a new alt.binaries partition on news.sol.net. My only "gotcha" was that ccd insists on the component partitions being of type "4.2BSD" which I wasn't quite expecting. It might be better to have a different partition type ("CCD"?) to avoid confusion. The error message given by ccdcontrol was hideously vague, of course it only took a minute or two to go grepping for the errno in the driver and inspect the relevant code, and then it made sense. Anyways, we have ways to exercise the code :-) and it appears to be working just great! I have a six-drive array that's just begging for ccd. Somebody please fold this into -current! It's exactly what we need... nifty things like this are great selling points for FreeBSD. ... Joe ------------------------------------------------------------------------------- Joe Greco - Systems Administrator jgreco@ns.sol.net Solaria Public Access UNIX - Milwaukee, WI 414/342-4847