From owner-freebsd-questions Thu May 11 14:10:36 2000 Delivered-To: freebsd-questions@freebsd.org Received: from symbion.srrc.usda.gov (symbion.srrc.usda.gov [199.133.86.40]) by hub.freebsd.org (Postfix) with ESMTP id 96F3137BBDA for ; Thu, 11 May 2000 14:10:29 -0700 (PDT) (envelope-from gjohnson@nola.srrc.usda.gov) Received: (from glenn@localhost) by symbion.srrc.usda.gov (8.9.3/8.9.3) id QAA47183; Thu, 11 May 2000 16:10:17 -0500 (CDT) (envelope-from glenn) From: Glenn Johnson Date: Thu, 11 May 2000 16:10:16 -0500 To: Forrest Aldrich Cc: freebsd-questions@FreeBSD.ORG Subject: Re: CCD question Message-ID: <20000511161016.A45848@node1.cluster.srrc.usda.gov> References: <4.3.1.2.20000511111832.00d156f0@216.67.12.69> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 1.0.1i In-Reply-To: <4.3.1.2.20000511111832.00d156f0@216.67.12.69>; from forrie@forrie.com on Thu, May 11, 2000 at 11:20:17AM -0400 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Thu, May 11, 2000 at 11:20:17AM -0400, Forrest Aldrich wrote: > I'm looking into working with CCD. Is there a HOW-TO in the manual, I > didn't find one on freebsd.org. > > It's not clear to me: > > In order to compile in support for the ccd, you must add a line > similar to the following to your kernel configuration file: > > pseudo-device ccd 4 # concatenated disk devices > > The count argument is how many ccds memory is allocated for a boot > time. In this example, no more than 4 ccds may be configured. > > whether this "ccds memory" and such refers to the number of actual > physical /dev/ paritions or it's referring to the number of "ccds" as > in the pseudo devices themselves. The kernel config line you mention means that the kernel will support a maximum of 4 ccd devices, and they would be /dev/ccd0, /dev/ccd1, /dev/ccd2, and /dev/ccd3. Of course you have to make the dev entries with MAKEDEV. Also, you could use the ccd kernel module instead of recompiling a kernel. Actually, the next two sentences of the man page following your quote above mention that so you probably already knew that. HTH -- Glenn Johnson USDA, ARS, SRRC Phone: (504) 286-4252 New Orleans, LA 70124 e-mail: gjohnson@nola.srrc.usda.gov To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message