Sony Corporation Global Headquarters
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Professional Disc for DATAModel Name : PDDRW23B (Rewritable) PDDWO23B (Write Once) |
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Vast capacity and accelerated data transferProfessional Disc for DATA achieve unparalleled 23.3GB storage capacity per side together with 11MB/second read and 9MB/second write speeds. Media durability of at least 10,000 rewrite cyclesProfessional Disc for DATA media has been tested by Sony to provide at least 10,000 rewrite (erase/write/read) cycles and at least one million read cycles. Blue-violet laser and high-performance lensProfessional Disc for DATA uses a short 405nm blue-violet laser. Furthermore, the lens NA (numerical aperture) is raised to NA 0.85 for considerably higher convergence. This combination of blue-violet laser and NA 0.85 lens creates a beam spot only one fifth the area of a DVD beam spot, so much more data can be packed into a smaller space. Track pitch narrower than half a DVD'sA narrow track pitch lets more data be recorded within the same disc area. Sony's advanced stamper technology creates a track pitch of only 0.32μm. High tilt margin with thin protective layerThe result is outstanding read/write stability with a tilt margin on a par with the DVD format, while using a beam spot only one-fifth as large. Rugged new cartridge designIt is constructed to not only seal out dust but also prevent damage of all kinds. 50-year or better archival stabilitySony test results show an estimated lifespan of 50 years or more for data stored on the Professional Disc for DATA at room temperature. Hard case protectionA robust shock-resistant polypropylene case is provided for storage and transport. |
| PDDRW23B /PDDWO23B | |
|---|---|
| Recording Capacity (GB) | 23.3 |
| Data Transfer Rate (MB/s) | 11 (read) ,9(write) |
| Sector Size (Bytes *1) | 2048 |
| Recording Layer | Phase change |
| Recording Method | On groove |
| Track Pitch (μm) | 0.32 |
| Protective Layer Thickness (mm) | 0.1 |
| Erase / Write / Read Cycles *2 | ≥ 10,000 |
| Read Cycles | ≥1,000,000 |
| Byte Error Rate | ≤2×10-4 |
| Estimated Archival Life (years) *3 | ≥50 *3 |
| Cartridge Dimensions(mm) | 128.6×130.6×9.1 |
| Disk Diameter (mm) | 120 |
| Weight (g) | 90 |
| Environmental Requirements |
Operation Conditions (°F(°C);%RH) : 32~131 (0~55);3~85 Storage Conditions (°F(°C);%RH) : 14~131 (-10~55);3~90 |
This disc is compatible with the "Professional Disc for DATA"system. It is not compatible with "Blue-ray" system or "Professional Disc" system(XDCAM).
*1 Can be changed to 512Bytes when formatting.
*2 Data result from Internal Testing.
*3 Estimated life under 23°C 50%RH environment by our test
*4 The actual capacity and data transfer rate may vary depending on equipment, software usage, environments and data.
1GB= 1 billion bytes
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Blue-violet laser and high-performance lensSince wavelength decreases toward the blue end of the spectrum, Professional Disc for DATA uses a short 405nm blue-violet laser compared to the longer 650nm wavelength red laser used by DVD and MO drives. Furthermore, the lens NA (numerical aperture) is raised to NA 0.85 for considerably higher convergence than the NA 0.6 of DVD or NA 0.575 of MO drive lenses. This combination of blue-violet laser and NA 0.85 lens creates a beam spot only one fifth the area of a DVD beam spot, so much more data can be packed into a smaller space. |
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High tilt margin with thin protective layerTo support read/write accuracy with the use of a small beam spot, Professional Disc for DATA incorporates a protective layer that is 0.1mm thick, with an ultra-precise tolerance of +-2µm. This effectively prevents aberration of the laser beam spot that would occur with a greater thickness if the disc tilts during rotation. The result is outstanding read/write stability with a tilt margin on a par with the DVD format, while using a beam spot only one-fifth as large. |
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Keys to higher capacityTo fit more data into a limited area such as the surface of a disc, recording density must be increased. Conceptually, this is like using a finer tipped pen to fit more letters onto a sheet of paper having more lines on it. With optical discs, the laser beam spot is the pen tip and the disc track pitch is the line spacing. |
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Track pitch narrower than half a DVD'sA narrow track pitch lets more data be recorded within the same disc area. Sony's advanced stamper technology creates a track pitch of only 0.32 >m, far narrower than the 0.74 >m of DVD or 1.3 >m of MO media. |
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Rugged new cartridge designA rugged new cartridge encloses the entire Professional Disc for DATA, protecting the large volume of data and helping avoid read/write errors. It is constructed to not only seal out dust but also prevent damage of all kinds. The cartridge is made of tough, heat-resistant polycarbonate with anti-static polymer for the lower shell and rotary shutter to enhance dust resistance. |
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