An optical data disc with multiple booting points
A technology for data discs and optical discs, which is applied to data recording, multi-layer discs, disc-shaped record carriers, etc.
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[0018] This part describes in detail one of the best ways to implement the present invention.
[0019] Figure 1 shows a (prior art) single-layer Portable Blu-ray Disc 100 (PB) with a single boot entry point. The boot entry point typically physically resides in the lead-in area 106 of the optical data layer 102 . The lead-in area 106 generally includes a disc navigation area (DN) and a rights management area (RM). PB 100 also includes a lead-out area 108 and a RIM 120 . An area on the PB 100 that is typically used for an application mapped as a logical address space starts with a logical address "0" immediately following the lead-in area 106 and ends with "n" up to the front of the lead-out area 108 . Typically, the reading direction of data is from the lead-in area 106 towards the lead-out area 108 (arrow direction), since optical discs are typically read and written in an outward (data) spiral. The lead-in area 106 is usually located near the inner hole of the disc, while ...
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