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From: Lowell Gilbert <freebsd-questions-local@be-well.ilk.org>
Date: 07 Jan 2004 10:06:03 -0500
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Subject: Re: Cd rom device naming - thanks for helping
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"Craig Lloyd" <sonylloyd@metacrawler.com> writes:

> ->Just an info on something I could found nowhere
> (searched the device namings section of FreeBSD handbook, 
> books, other forums..etc) 
> 
> I know that IDE ATAPI cdrom drive is 
> acd -> 
> acd0 = 1st IDE ATAPI cdrom 
> acd1 = 2nd IDE ATAPI cdrom 
> acd2 = 3rd IDE ATAPI cdrom 
> ..etc
> My question: why is there mention in FreeBSD manuals
> and technicals of acd0a, acd0b..etc Why that letter
> at the end (which normaly designates a partition --but 
> there's no partitions on a Cd rom!!!)
> 
> OS that I have -> FreeBSD 5.1

Historical reasons.  Those devices are the ones in use on 4.x.

-- 
Lowell Gilbert, embedded/networking software engineer, Boston area: 
		resume/CV at http://be-well.ilk.org:8088/~lowell/resume/
		username/password "public"