Inertia wrote:There are no overburning codes. Overburning is a nonstandard operation not supported by the Orange Book standards. Overburning capacity is basically a trial and error determination that can be estimated by overburning tests in CD Speed and Feurio.
The 97m24s01f is the ATIP (Absolute Time In Pregroove) code, and is used to identify the manufacturer of the disc, the dye type, and the write strategy.
See ATIP Code Search. Go to the Extended Search section, enter the ATIP code and it will bring up the manufacturer of the disc and some of the packaging configurations.
dolphinius_rex wrote:That's not actually true anymore. TDK does have some true 90min CD-Rs which allow for 90min burning without overburning. These discs have a proper 90min ATIP code. Also, most discs that are made for 99min overburning (made by Ritek) have a 96m **s **f ATIP code instead of the usual 97m **s **f ATIP code.
What exactly is not true anymore? Does the Orange Book now define overburning and support it? If a disc has a proper 90 minute ATIP code that doesn't require overburning, this this is not overburning is it? If TDK has changed the ATIP to allow this to happen, will the disc be compatible and play in all CD players and CD-ROM drives? Does the Orange Book now define a 90 minute disc capacity? Can you supply some links to this revision, if any, or any other information? Is the OSTA.org Technology Q&A
web site not updated to reflect that change?
OSTA.org wrote:DISC SIZE AND CAPACITY
What about 34, 90 and 99 minute CD-R discs?
A few media manufacturers have recently introduced 34 minute/300 MB (8 cm), 90 minute/790 MB and 99 minute/870 MB (12 cm) CD-R discs. To achieve these higher capacities such discs do not conform to Orange Book specifications and, as a result, may not write in all recorders, be accessible to all software or readable in all players and drives. Using 34, 90 and 99 minute CD-R discs is therefore not recommended.
Checking the Philips website for Orange Books
indicates no changes beyond the definition of high speed disc types and the concomitant inclusion of the PCA2 Power Calibration Area
option. If in fact Philips has not revised the Orange Book specifications, then TDK would be using a nonstandard disc length in the ATIP with the 90 minute discs referenced by you. Presumably this would be done since a 90 minute disc is nonstandard anyway and the ATIP change would eliminate having to use overburn settings in software. If so, these discs are not "true" 90 minute discs but discs with a nonstandard "user friendly" disc capacity in the ATIP.
If most 99 minute discs have a 96m****** ATIP as you state, what particular help is that in regard to overburning? Someone that buys 99 (or 90) minute discs already knows the capacity they can expect from the discs.
msuiter's question was whether the ATIP code of a disc was an accurate measure of its overburning capacity. The ATIP code is unrelated to overburning, per se, although as you state it might be related to extra capacity 99 minute discs in some instances. Even in this (unrelated to true overburning) instance, the 96m****** ATIP code is just a number and not the capacity of the 99 minute disc.
In any event, true overburning requires that software ignore the disc capacity in the ATIP and use a capacity manually entered into the software for writing to the lead-out area of the blank CD-R.