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Date:      Mon, 18 Dec 2000 17:53:42 -0600
From:      "David W. Chapman Jr." <dwcjr@inethouston.net>
To:        "Brooks Davis" <brooks@one-eyed-alien.net>
Cc:        "stable" <stable@FreeBSD.ORG>
Subject:   Re: DMA33 ATAPI CDROM and 4.2-STABLE
Message-ID:  <01a501c0694d$c0865040$931576d8@inethouston.net>
References:  <015d01c0694b$c34952c0$931576d8@inethouston.net> <20001218154939.A15680@Odin.AC.HMC.Edu>

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>
> DMA is disabled by default for ATAPI devices like CD-ROM drives because
> many report that the support it but just crash your system if you
> actually try to use it.  If you really want that virtualy useless
> speedup you can enable the option ATA_ENABLE_ATAPI_DMA in your kernel
> config.
>
I actually have that option compiled in my kernel, not that I need the
speedup, unless it is slowing down my dma66 harddrive.



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