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Date: Wed, 13 Jul 2005 12:33:55 +0400
From: Dmitry Mityugov <dmitry.mityugov@gmail.com>
To: Yuri <yuri@tsoft.com>
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References: <42D4C8C9.1030401@tsoft.com>
Cc: freebsd-questions@freebsd.org
Subject: Re: why CDROM operations cause system to be slow and HD operations
	do not
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On 7/13/05, Yuri <yuri@tsoft.com> wrote:
> When I read something from CDROM my system gets visibly slow and HD
> reads/writes do not have the same effect.
>=20
> I think they both should have similar effect on system performance since
> multiple requests should just wait till completion interrupt and other
> processes shouldn't be affected.

Is DMA enabled on both the HD and CDROM?

--=20
Dmitry

"We live less by imagination than despite it" - Rockwell Kent, "N by E"