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Date: Fri, 1 Nov 1996 04:20:26 -0800 (PST)
Message-Id: <199611011220.EAA03017@silvia.HIP.Berkeley.EDU>
To: marck@pluscom.cronyx.ru
CC: freebsd-fs@FreeBSD.ORG
In-reply-to: <199611011155.OAA13154@pluscom.cronyx.ru> (marck@pluscom.cronyx.ru)
Subject: Re: (fwd) ccd Q
From: asami@FreeBSD.ORG (Satoshi Asami)
Sender: owner-fs@FreeBSD.ORG
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By the way, "freebsd-fs" is not an appropriate place to ask such
questions.  ccd is a device driver that implements a virtual disk, and 
not a filesystem.

 * 1. is there any [dis]advantage of using different size disks to be joined
 * together as a ccd? 

I don't think the size matters that much, but different speed (MB/s)
seems to screw up the performance real badly.

 * 2. is using IDE disks for ccd good or bad idea?

Never tried it.

 * More precisely: I've got some disks, IDE and SCSI, different sizes, 
 * more or less useful as standalone. 
 * I plan to test ccd for our newsserver with minimal expences.
 * What should I do?

If you just want to test, as in see if it works, experience with the
commands and setup, that's ok of course.  If you want to do any
serious performance measurements/tuning, you can only do that with the 
exact set of disks you are going to use for the news server.

Satoshi