The Test

Our benchmarks include a few tests to show the performance of each of our test drives. We first use Nero CD-DVD Speed to create a data disc, which tests the write capabilities/performance of the drive. We then run a transfer rate test to benchmark the read capabilities as well as verify the data on the disc.

Finally, we use our Plextor PX-712A drive to read the media for PI/PO errors. According to the ECMA standard...
A row of an ECC Block that has at least 1 byte in error constitutes a PI error. In any 8 consecutive ECC Blocks, the total number of PI errors before correction shall not exceed 280.

A row is 182 bytes long where the last 10 bytes contain PI (Parity Inner) information. An ECC block is 208 rows long where the last 16 rows contain the PO (Parity Outer) information. This gives us a maximum possible PI error amount of 208 errors per block and for 8 blocks after each other, this sum is of course 8 times higher giving a maximum possible amount of 1664 PI errors.

If a row of an ECC Block contains more than 5 erroneous bytes, the row is said to be “PI-uncorrectable” or PIF (Parity Inner Failures).

In any ECC Block, the number of PI-uncorrectable rows should not exceed 4.
Now, some writers may create discs with more than 208 PI errors and they are not necessarily unreadable, but they are not the best quality discs around.

Our test bed:

AMD Athlon64 3500+ (2.2Ghz)
Giga-byte GA-K8NXP-SLI
NVIDIA 6600GT SLI Edition (single 128MB card)
1GB (512MBx2) Corsair XMS4400
Plextor PX-712A, Firmware v1.07

Microsoft Windows XP SP2
Nero CD-DVD Speed 4.00
PlexTools Professional XL 3.03

The Competition

  Firmware Access Time
(CD/DVD)
DVD +/-R Write DVD +/-RW Write DVD +/-R DL Write CD-R/RW Write CD/DVD Read Buffer Size
BenQ DW1640 BSHB 120ms/
120ms
16x/16x 8x/6x 8x/NA 48x/32x 48x/16x 2MB
LG GSA-4163B A104 125ms/
145ms
16x/16x 8x/6x 4x/NA 40x/24x 40x/16x 2MB
NEC ND-3540A 1.01 120ms/
140ms
16x/16x 8x/6x 8x/6x 48x/32x 40x/16x 2MB
Pioneer DVR-109D 1.55 120ms/
130ms
16x/16x 4x/6x 6x/NA 40x/24x 40x/16x 2MB
Sony DRU-720A JY03 140ms/
135ms
16x/16x 8x/6x 4x/NA 48x/24x 40x/16x 2MB
Toshiba SD-R5372 TU55 100ms/
120ms
(200ms DVD-RAM)
16x/16x 8x/6x 5x/NA 48x/24x 48x/16x 2MB

Index 16x -R - MCC 03RG20
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  • g33k - Tuesday, July 12, 2005 - link

    Yup, it looks like you might be better off buying a last gen drive. It might take a while for the firmware updates that may improve these drives.

    From the looks of it, NEC and Pioneer are no longer the best drives. BenQ has that title now.
    Reply
  • Beenthere - Tuesday, July 12, 2005 - link

    Doesn't look like ANY of these drives are worth buying with so many errors.

    SOD, DD. Rushed to market CRAP !!!
    Reply
  • quadcity - Tuesday, July 12, 2005 - link

    "Special thanks to BenQ for supplying us with the DW1640."
    Reply
  • nutxo - Tuesday, July 12, 2005 - link

    Where did they acquire a benq 1640? Reply

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