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Date:      Fri, 14 Jan 2000 12:50:19 +0100 (CET)
From:      Soren Schmidt <sos@freebsd.dk>
To:        vova@express.ru (Vladimir B. Grebeschikov)
Cc:        current@FreeBSD.ORG
Subject:   Re: ATAPI CDROM trouble
Message-ID:  <200001141150.MAA87144@freebsd.dk>
In-Reply-To: <Pine.BSF.4.21.0001141433250.46165-100000@lanturn.kmost.express.ru> from "Vladimir B. Grebeschikov" at "Jan 14, 2000 02:42:20 pm"

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It seems Vladimir B. Grebeschikov wrote:
> 
> With new ATA driver I have big trouble 
> - I can't use my CDROM
> 
> while I am do 'mount_cd9660 /dev/acd0c /m/cd'
> system compleatly holds, no core, no panic - hold (may be deadloop in
> kernel mode ?)

> options        ATA_ENABLE_ATAPI_DMA    #Enable DMA on ATAPI devices

Dont define this until you know the drive is functioning otherwise,
LOTS and I mean LOTS of atapi devices dont do DMA even if advertised.

-Søren


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