Inconsistent results from DB/EAC on various Computers

[sorenb]

Hi

I am pretty new to ripping so this might not be quite as odd as I see it.

CD: The newest Miles Davis, Kind of Blue (From the Celebration box, with DVD and LP as well).

Three computers:
A:
Running Windows 7 x86, 4GB
Matshita DVD-RAM UJ-842, no cache, FUA, C2

B:
Running Windows 7 x64, 4GB
Matshita DVD-RAM GSN-U10N, 39kb cache, C2

C:
Running Windows 7 x64, 6GB
Plextor Premium, cache 1173kb, FUA, C2
Philips DVD-8631, no cache, no FUA, no C2

All computers have for the purpose of testing the dbPowerAmp and EAC 99p5 installed.
dbPowerAmp configuration is identical on the computers used:
*all accuraterip configured*
Overread Lead-in/out: No
AccurateRip: Active
Invalidate: No
Pass 1 Drive Speed: Max, Pass 2 Drive Speed: Max
Ultra:: Vary Drive Speed: Yes, Min Passes: 1, Max Passes: 10, Finish After Clean Passes: 2
Bad Sector Re-rip:: Drive Speed: Max, Maximum Re-reads: 700

Ripping the album, I started out using A, and discovered that track 6 was secured ripped but couldn't be verified by AccurateRip.
The result is consistent; I have re-riped the track about ten times.

Doing the same rip on B result in an Accuraterip.
The result is consistent; I have re-riped the track about ten times.

Doing the same rip on C result in a secured but not an Accuraterip.
That goes for both the Plextor and the Philips drive.
The wavs from DB and EAC are 100% identical as expected since they are secure and accurate.

I have compared the wav's from C ripping.
It turned out that they were all different, that is the wav's rip with DB didn't compare, the wav's ripped with EAC didn't compare, nor did they compare when matching DB-Philips with EAC-Philips, or DB-Plextor with EAC-Plextor.


Conclusion:
My conclusion is that the CD it self contains some pits/lands that are somehow badly and that seem to produce errors on several drives.
If my conclusion is right there doesn't seem to be much to do about it?
If I am wrong it might be that a certain configuration might work better?

Comments are welcome ;o)

/Cheers S

[Spoon]

Re: Inconsistent results from DB/EAC on various Computers

Yes you conclusion is right, certain drives can read certain discs one way. A common one is where the drive gets a new offset whilst ripping (where the accurate stream fails).

Only with multi-drives can you detect this, even in accuraterip it might appear as track 1 confidence 100, track 2 confidence 50 (where the results are split depending on drive used).