Scans on early media

[SCDVD]

I'm curious if anyone has done a scan (KProbe etc.) on the media from the "old" days. I'm specifically refering to 1X media written on a Pioneer 101. Not only would this be several years old but also the first consumer DVD-R products.

[lordsmurf]

There was no Pioneer 101 ... the first drive was the 103 in early 2001. I owned one. I've still got 1x RITEKG01, 2x PVC001001, 2x MCC00RG20 and 1x PRINCO media that burned okay and are still fine.

I can't do scans right now though, don't have drives set up for that currently.

[SCDVD]

When you get a chance to scan them, it would be interesting to see the results. Since you say they are still fine, that's good to hear. It's hard to beat the best test of all - how well do they play. Are the RitekG01 discs the ones with the gold reflective layer?

[lordsmurf]

Yes, the RITEKG01 are gold. The PRINCO are both silver and white. The MCC is Apple branded. The PVC is Pioneer branded.

[joeg04]

I scanned 2 VIVASTAR DVD-R. Both show bad scan results, but play perfectly on my PC and on my standalone player Pioneer DV454. I am not sure if that info helps you.

------------------------------------------------
1st disk (top side silver):
Burner: Toshiba SD-R5002, Burning speed: 2x, Burning date: May 2003

Date : 27.11.2005 18:10:59
Model : 2-0-0-0 G:LITE-ON DVDRW SOHW-1653S CS09
Disc : DVD-R , VIVASTAR []
Speed : Max
ECC blocks sum (PI/PIF) : 8/1
Scanned range : 0 - 1485554
Sampling count : 71623
Errors : 0
PI Max : 1440
PI Average : 1333,00
PI Total : 14436905
PIF Max : 119
PIF Average : 335,70
PIF Total : 3638014

------------------------------------------------
2nd disk (top side "MAXdisc"):
Burner: Toshiba SD-R5002, Burning speed: 2x, Burning date: Apr 2003

Date : 29.10.2005 21:23:30
Model : 2-0-0-0 G:LITE-ON DVDRW SOHW-1653S CS09
Disc : DVD-R , VIVASTAR []
Speed : Max
ECC blocks sum (PI/PIF) : 8/1
Scanned range : 0 - 923216
Sampling count : 36213
Errors : 0
PI Max : 1449
PI Average : 1136,00
PI Total : 7435131
PIF Max : 150
PIF Average : 538,50
PIF Total : 3522325

[SCDVD]

It looks like the high scan results didn't cause any errors. Your scan reports zero errors. The error correction algorithm on DVD media is pretty robust. If the errors don't group together in such a way that prevents the data reconstruction in the error correction circuits then you can get by with some pretty rotten scans. However, if the errors fall in areas that prevent error correction, it's a problem. I have seen this problem on discs with better scans than the ones you show above. It's a bit of the luck of the draw as to where the errors fall and the impact it has on error correctability. But the fewer PI and PIF errors that you have, the better you odds are as far as incorrectable errors.