later IDE drives require DMA enabled to reach their top speed, it is true
even on 24 speed drives. without DMA enabled, they will not perform at best
plus they will run out of buffer most of time, the likely picture you will
see if a drive is working at PIO mode is that it runs out of buffer all the
time, and its buffer under-run protection kicks in million of time during
recording. In case the drive has no protection and is faster than 10 speed,
running in PIO mode is simple not possible.

the "disable DMA" trick was used in old age, that drives run very slow,
therefore buffer under-run is not an issue (normally).

Jun Qian

----- Original Message -----
From: "Joe Lore" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, July 09, 2002 9:08 PM
Subject: Re: [PCBUILD] CD-R/RW problem


> check the properites of the cd-rom and disable ATA66 or ATA100 if checked
>
>

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