detail information
| Posted by | Jan S. |
| Posted on | 21/05/05 21:49 |
Test Disc #6:
The sixth test disc is a That's Write! DVD-R media:
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Unique
Disc Identifier :
[DVD-R:VANGUARD]
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Disc
& Book Type : [DVD-R] -
[DVD-R]
Manufacturer Name : [Vanguard Disc
Inc.]
Manufacturer ID :
[VANGUARD]
Disc Application Code : [Unrestricted Use : Consumer
Purpose]
Recording Speeds : [1x , 2x ,
4x]
[6x And Higher Might Not Always Be Detectable]
Blank Disc Capacity
: [2,298,496 Sectors = 4,489.3MB = 4.38GB
(4.71GB)]
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**
INFO : Hex Dump Of 'Media Code'-Block Listed Below
** INFO : 4-Byte Header
Preceding 'Media Code'-Block Discarded
** INFO : Format 0Eh - Pre-Recorded
Information In Lead-In
0000 : 01 40 c1 fd 9e d8 52 00 02 f7 0e 0b 77 88
70 00 .@....R.....w.p.
0010 : 03 56 41 4e 47 55 41 00 04 52
44 00 00 00 00 00 .VANGUA..RD.....
0020 : 05 aa a2 22 22 20 01
00 06 0b 0f 12 66 66 80 00 ..."" ......ff..
0030 : 07 88 80
00 00 00 00 00 08 01 1b 0b 0f 08 08 00
................
0040 : 09 55 09 10 0b 90 88 00 0a 80 88 80 88 80 10
00 .U..............
0050 : 0b 00 00 00 00 00 00 00 0c 00 00
00 00 00 00 00 ................
0060 : 0d 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00
................
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[
DVD Identifier - http://DVD.Identifier.CDfreaks.com
]
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AudioDev CATS test results:
Disc id: DVD-R THAT´S WRITE
Disc Manufacturer ID: VANGUARD
Analysis of CATS results:
This disc has several critical parameters out of the specification limits. At the end of the disc the Bottom Jitter exceeds 19%, which is more than twice the maximum allowed value. The Reflectivity (R14H) is quite low and sometimes just below the minimum value, but this is not much of a problem. On the other hand, the Asymmetry ratio reaches -20, which means that the HF signal is extremely deteriorated. Not only the data are damaged but we see that the Radial Error (Radial2) is increasing a lot at the end of the disc, which means that the drive also has more and more difficulties following the track near the end of the disc. As a result, the PI errors are very high and some POF occur in this region.
Our home-made test results:
Scanned with KProbe and Lite-On SHOW-1633S
Scanned with CD-speed and Philips DVDR1640P
|
Drive Info |
ID:1 PLEXTOR DVDR PX-712A V1.05 (#101824) | ||||||||||||||||||||||
|
Test Settings |
Read Speed: |
2X CLV | |||||||||||||||||||||
|
Test Interval Length: |
High Accuracy | ||||||||||||||||||||||
|
Test Result |
Disc Info: |
CD_SPEED_DATA_TEST_B DVD-R, 4488 MB (CD_SPEED_DATA_TEST_B) VANGUARD | |||||||||||||||||||||
| |||||||||||||||||||||||
|
Test Duration |
1:19:38 |
||||||||||||||||||||||
|
Drive Info |
ID:1 PLEXTOR DVDR PX-712A V1.05 (#101824) | ||
|
Test Settings |
Read Speed: |
2X CLV | |
|
Test Result |
Disc Info: |
CD_SPEED_DATA_TEST_B DVD-R, 4488 MB (CD_SPEED_DATA_TEST_B) | |
|
Test Duration |
0:30:06 |
||
|
Comparison |
Average |
Max |
Average |
Max |
POF |
|
AudioDev |
310.1 |
1664 |
7.7 |
208 |
- |
|
Lite-On |
107.6 |
1353 |
12.72 |
209 |
- |
|
Philips |
(25.69) |
(164) |
(0.14) |
- |
(8212) |
|
Plextor |
(7.1) |
(1149) |
- |
- |
(739) |
CATS vs. drives results:
From all our drives only the Lite-ON was able to successfully complete the scan of this disc. The worse result was obtained by the Philips drive, which gave up after only 2.8 GB. Note that in this case the CATS has been able to keep reading the disc at very high bottom jitter values, which means that the Pulstec drive also has a very good PLL and that the failure of disc #4 was due to another problem. This is another example of disc which can be read by the CATS and not by some drives.
Note on the CATS results that PIE SUM8 reaches 1664 and PIF SUM1 reaches 208, which are the theoretical maximum values : at the same time, we see on the graph that POF goes to 1 and stays there, which means that all ECC blocks are bad, which is perfectly consistent. The '209' reported by KProbe also corresponds to a completely bad ECC block and should be a '208', but was probably caused by a sampling problem. This is a good example of the better measuring accuracy of CATS systems.
Head over to the next page for the conclusion…
Test Disc #5
There´s a reason for standards and specifications. It doesn´t matter, that there are many drives which outperforme a 1996 standard DVD ROM drive, if the one you have to use somewhere else doesn´t.
It´s great, if my new burner handles even discs, which reflecting to the standard, are completly f* ->aehm<- messed up, but if my lame notebook drive or the SA DVD Player or the 5 year old installation DVD ROM in my server can´t, it doesn´t really help me.
The specifications and standards are well known and I´m pretty upset, that the manufacturers don´t give a sh*t. If future players can´t play today´s discs, the customer has to worry.
Feel that manufacturers are not doing the R&D, but rather foisting incompetent and unreliable technology onto the buying public - I have decided against going hard drive or Disc for my camcorder. Can only afford one in my lifetime, so am going backwards to DV tape.
I also know many people who are so confused and have heard negative things about new technology such as unrelaibility, incompatability, and lack of longevity- no to mention that with so many avenues to go down, sales people do not know a lot anymore and conflicting sales views confuse the public even more.
It is time that the retailers told the manufacturers - NO - give me products to sell that will please my constomers and I know of at least one major large shop that specialises in Entertainment systems that refuse to sell anybodies DVD recorders due to the problems aforementioned.
This technology has been released too early and the manufacturers do not even know enough so their help lines are often of little help or incorrect advice.
Furthermore to have your pics put onto disc at great cost (commerciallly) and then find that a few years after, some of those pics are lost with more degrading quickly over time- I htink that perhaps the old ghastly VHS tape may be better for longetivity especially with consumer copied material.
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