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Phase-change Dual

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Title: Phase-change Dual  
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Subject: PD, 120 mm discs, Optical disc, DVD-RAM, Optical disc drive
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Phase-change Dual

PD-M650
Drive TEAC PD-518E with medium TEAC PD-M650.

Phase-Change Dual (PD) is a rewritable optical disc format introduced by Panasonic in 1995. Much like CD-RW, PD uses a phase change layer that can be overwritten in a single pass of the read/write head. A PD disc has a capacity of 650 MB, can be rewritten 500,000 times and is enclosed in a protective cartridge. PD discs are compatible with PD drives and first generation Panasonic DVD-RAM drives while PD drives can read and write PD discs as well as read CD-ROMs.

References

  • Bennett, Hugh. "Is Multi CD-R too Late for the Party?" EMedia Professional July 1998.

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