On Mon, 17 Feb 2003, Thomas H. George wrote:
> On Mon, Feb 17, 2003 at 04:36:13PM -0500, Matthew Weier O'Phinney wrote:
...
> > > I have append="hdd=ide-scsi" in lilo.
> > > On bootup dmesg|grep hdd shows
> > >
> > > ide-setup: hdd=ide-scsi
> > > ide1: BM-MDA at 0xf008-0xf00f, BIOS settings: hdc DMA hdd:
> > > DMA
> > > hdd: Norcent RWJ-401S, ATAPI CD/DVD-ROM drive
...
> I did not intentionally set DMA on /dev/hdd and I don't know how to turn
> it off. Could you tell me how you did this?
to turn it off for a test..
hdparm -d 0 /dev/hdd
you want to leave dma turned on ... you will read/write 5x-10x faster
w/o dma
hdparm -d 0 /dev/hdd
hdparm -tT /dev/hdd --- look at the "buffered disk read"
w/ dma
hdparm -d 1 /dev/hdd
hdparm -tT /dev/hdd
and for y.a. cdrw-howto ( i'd say double check your kernel options )
http://www.Linux-1U.net/CDRW/#Kernel
c ya
alvin
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