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Posted by Eamon Skelton on 04/01/07 18:26
On Sun, 01 Apr 2007 10:50:45 +0000, root wrote:
>> UDMA modes: udma0 udma1 udma2 udma3 *udma4 udma3 *udma4
That looks good. UDMA4 is the correct mode.
> /dev/sda:
> Timing buffered disk reads: 230 MB in 3.00 seconds = 76.66 MB/sec
>
Excellent!
I wonder why you are having problems writing at high speeds. Can you
read DVD to HD at full speed?
I think you have a fairly new machine with Core2 duo and SATA. What
mainboard does it use? Are there any known issues with the SATA chip
and Linux? Are you using a recent kernel?
If all else fails, you might have to take a walk on the dark side
and try it on Windows before you write it off as a dud. A CD-DVD Speed
burn test might reveal the cause of the problem.
> I can't share the cdfreaks rave review. Since the BenQ and Optiarc
> drives do read RAM at 5x, I wonder if Pioneer sets the max read
> speed to be the stated write speed. My RAM disks are Panasonic
> 2-3x.
I use Panasonic 3x DVD-RAM with my Liteon and LG drives. I get
write speeds around 1.5x and read speeds around 3x despite the
fact that the Liteon is rated for 12x.
I'm running out of ideas! Are you using an 80 wire IDE cable? Try using
a different one, just in case.
Try running as root:
dd bs=1024 count=4589843 if=/dev/sda of=/dev/null
This will read 4482MB from your hard-disc and dump it
down a black hole. A fast SATA drive like yours will
probably do this in less than a minute.
What burning software do you use? I use growisofs from the
console or with K3B as a graphical front-end.
Are you using the ATAPI driver or ide-scsi?
Enough questions for now :-)
E.S.
--
Linux 2.6.18
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