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Date: Fri, 04 May 2007 00:28:27 -0600
From: Scott Long <scottl@samsco.org>
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To: Ian Smith <smithi@nimnet.asn.au>
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Cc: stable@freebsd.org, "Sean C. Farley" <sean-freebsd@farley.org>,
	Ulrich Spoerlein <uspoerlein@gmail.com>
Subject: Re: acd and iostat [was Re: FreeBSD vs Region Code DVDs]
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Ian Smith wrote:
> On Thu, 3 May 2007, Scott Long wrote:
> 
>  > Ulrich Spoerlein wrote:
> [..]
>  > > PS: why is iostat(1) not working for acd(4) devices?
>  > 
>  > Because acd doesn't make use of the standard kernel facilities that make
>  > iostat work.  It's a deliberate choice by the driver author.
> 
> Same for systat -vm of course.  I guess this was a regression, as acdX
> used to show up fine in 4.X in {sys,io}stat, whether or not also showing
> cdX (with atapicam).  I often used to watch it while testing burned CDs. 
> 
> Was that because of an API change to said kernel facilities, perhaps?
> 
> Cheers, Ian
> 

No, the devstat kernel API hasn't changed in since it was introduced 
nearly 10 years ago.

Scott