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CD-R Compatibility Study – Phase 2 120000 100000 80000 60000 Single Byte Bursts per Disc Minimum Median Multiple Byte Bursts per Disc 14000 12000 10000 8000 6000 40000 4000 20000 2000 0 1 2 3 4 5 6 7 8 9 1011 P Media 1 2 3 4 5 6 7 8 9 1011 P Media 0 Figure 10.7 50000 45000 40000 35000 30000 25000 20000 15000 10000 5000 Single Byte Burst by Writer Minimum Median Multiple Byte Bursts by Writer 4500 4000 3500 3000 2500 2000 1500 1000 500 0 1 2 3 4 5 6 7 8 9 10 11 Writer 1 2 3 4 5 6 7 8 9 10 11 Writer 0 Figure 10.8 © OSTA – Optical Storage Technology Association 37
CD-R Compatibility Study – Phase 2 11.0 Future Plans The improved and clustered results of Phase 2 provide all OSTA members with yardstick Global Population data that can be used to further improve CD-R media and recorders. The improvement in CD-R media compared to Phase 1 shows that CD-R media quality has been established, and that allows the industry to focus on other issues, such as drive standardization and recording software. The consistency of the media manufacturing processes is impressive and is a tribute to the collective work of many OSTA companies to promote successful implementation of the CD-R Orange Book specification. Final proof of CD-R value to the end user is that the high speed reading tests compare almost identically to pressed CD-ROMs for data access times and playability, with no loss of data even despite the purposeful selection of the “worst” recorded discs. The recorded CD-R media used in the Phase 2 study have already been repurposed as a resource provided to thirteen DVD-ROM drive manufacturers. Specifically these OSTA discs will be used to assist in implementation of the “MultiRead” specification to ensure that DVD-ROM drives are backward compatible for reading CD-R media, thus further protecting the current investment in CD-R media and recorders. OSTA intends to continue testing media and drives. Phase 3 testing will involve CD-RW media and recorders. 38 © OSTA – Optical Storage Technology Association
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