Posted by Eamon Skelton on 03/31/07 10:57

On Sat, 31 Mar 2007 00:44:42 +0000, root wrote:

> FYI:
>
> I bought two of these new Pioneer drives on the basis of the published
> specs. My main interest is in DVD-RAM read speeds which are supposed
> to be 12x. In fact the drive reads at 2x or 2.7Mb/s.

DVD-RAM is very slow compared to DVD+/-R. Write verification doubles
the recording time and 12x media is as rare as hen's teeth.

> The drive is supposed to write at up to 18x. It writes a Verbatim
> 16x at an average speed of 5x. For reference, the Optiarc (Sony/NEC)
> 7170 writes the Verbatim disks at an average speed of 11.5x.

It should write Verbatim 16x at 18x CAV. The CDFreaks review shows
burn times of just over 5 minutes for Verbatim 16x media.
http://www.cdfreaks.com/reviews/Pioneer-DVR-112-DVD-Burner-Review/

> The machine is a Core 2 Duo 6700 with 2Gb of ram. I have enabled udma4
> operation. The Pioneer is a huge step backward.

Are you using your Linux PC for DVD burning? Try running as root:
"hdparm -i /dev/hdx" where 'x' is the device for your DVD drive.

I get:
debian:/home/skelton# hdparm -i /dev/hdd

/dev/hdd:

Model=HL-DT-STDVD-RAM GSA-H22N, FwRev=1.02, SerialNo=
Config={ Fixed Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=unknown, BuffSize=0kB, MaxMultSect=0
(maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 udma2 udma3 *udma4 udma3 *udma4
AdvancedPM=no
Drive conforms to: Unspecified:
ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4 ATA/ATAPI-5

* signifies the current active mode


Make sure that you have an 80 wire IDE cable and that you have the
correct chipset drivers for your IDE and/or SATA controller.

You can check your hard-drive read performance with:
"hdparm -t /dev/xdx" where 'x' is the correct device name.
This is most likely /dev/hda for IDE and /dev/sda for SATA

Typical speeds are between 40 and 80MB/S.

Here is the result for my SATA drive:
/dev/sda:
Timing buffered disk reads: 226 MB in 3.02 seconds = 74.86 MB/sec

Obviously, if you are using Windows you should ignore most of the
above and try doing a test burn with CD-DVD Speed:
http://www.videohelp.com/tools?tool=Nero_CD-DVD_Speed

HTH.

E.S.





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http://www.cdfreaks.com/reviews/Pioneer-DVR-112-DVD-Burner-Review/

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