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About Double-Layer DVD+R Media

Introduction to double-layer DVD+R media
Double-layer DVD+R media includes the following features:
  • Data capacity from 4.7 to 8.5 GB on a single side of the recordable DVD+R disc.
  • Compatible with most DVD-ROM and DVD-video players.
How does dual-layer media work
The double-layer DVD+R media is made up of two recordable layers. The laser of the DVD writer focuses through the semi-transparent material of the first layer to record to the second layer.
    Double-Layer DVD+R Media Structure
  1. Laser beam
  2. Label
  3. Polycarbonate
  4. Metal reflector
  5. Dye recording layer (L1)
  6. Spacer
  7. Semi-transparent metal reflector
  8. Dye recording layer (L0)
  9. Polycarbonate
Frequently Asked Questions (FAQ)
Question: Does HP provide updates for HP DVD writers to enable double-layer media recording?
Answer: No. HP DVD writers specifically designed for recording to double-layer media can write to double-layer discs.
Question: Is double-layer media compatible with my DVD player?
Answer: HP's testing shows compatibility to be at approximately 90%. Some older DVD players cannot read some double-layer discs.
Question: Can my my older DVD writer read burned double-layer discs?
Answer: Maybe. Certain DVD writers may need an upgrade to read from recorded double-layer discs.
Question: Can I copy movie discs to dual-layer discs?
Answer: HP does not support the copying of commercial, copyrighted material.
Question: Can I add additional data to a double-layer disc?
Answer: Yes. Recording software that came with your computer can use multi-session recording, allowing data to be incrementally added to a double-layer disc.
Question: Why is the capacity of a double-layer disc not equal to the capacity of two single-layer discs?
Answer: The laser focuses on one layer at a time to read or write data, light reflection from one layer always causes a small amount of interference with the other. Because of this, capacity of each layer is reduced by approximately 10%.
Disc compatibility tips
If you experience problems when creating discs, it may be that you are using low-quality discs. Using low quality media can impact the ability to write to the disc and the ability for other players to read it. The rest of this section explains in detail why this occurs and why you should use brand name discs that are known to work well in different brands of drives.
CD and DVD drives and the discs they write to are different and vary between brands. Disc differences include dye type, dye thickness, and substrate groove geometry. Drive differences include the laser beam shape, orientation, and power profile. In order to meet specifications and achieve the best recording quality, the drive must be able to adjust itself to the different types of discs.
Currently, there is no universal strategy for detecting recordable discs. Disc manufacturers stamp the properties of the media onto the disc as well as the manufacturer's own unique identification values. Unfortunately, using this method is voluntary and relies on the integrity of the disc manufacturer.
One of the main benefits of using HP products is that HP ensures its branded media complies to current industry methods for stamping identification values. Using HP or quality name brand discs ensures that your drive can properly detect and burn to the disc.
Double-layer discs can store more data than single-layer discs. However, double-layer discs burned with a dual-layer drive may not be compatible with many existing single-layer DVD drives and players. for maximum compatiblity, HP recommends the use of single-layer DVD+R discs for maximum compatibility with other DVD drives and players.


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Country: United States