Compatability test for phase-change erasable and WORM media in a multifunction drive

Shunji Ohara; Takashi Ishida; Chikashi Inokuchi; Tadashige Furutani; Kenzo Ishibashi; Akira Kurahashi; Tomio Yoshida

doi:10.1117/12.45923

1 July 1991 Compatability test for phase-change erasable and WORM media in a multifunction drive

Shunji Ohara, Takashi Ishida, Chikashi Inokuchi, Tadashige Furutani, Kenzo Ishibashi, Akira Kurahashi, Tomio Yoshida

Proceedings Volume 1499, Optical Data Storage '91; (1991) https://doi.org/10.1117/12.45923
Event: Optical Data Storage, 1991, Colorado Springs, CO, United States

Abstract

We have presented configuration of the multifunction drive, interchangeability test, and reliability test consisting of temperature test and reading many cycles test. The multifunction drive could be realized by adding laser power control block and the polarity switch of reading amplifier without changing the WORM's head on a current WORM drive. Interchangeability test results showed having good interchangeability among multifunction drives or among WORM drives, and also the multifunction drive had full compatibility with current WORM drive on the current WORM disk. Reliability test results for the multifunction drive using a PCE disk and a WORM disk showed that writing sensitivities of both disks were much less dependent ont he temperature and the drive had stable writing characteristics in environments from 5 degree(s)C to 50 degree(s)C, and furthermore no error bit was observed while reading the most inner track of each disk 10 million cycles with the read power of 1.8 mW being 20% up to normal one at 6.1 m/s of disk velocity.

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Shunji Ohara, Takashi Ishida, Chikashi Inokuchi, Tadashige Furutani, Kenzo Ishibashi, Akira Kurahashi, and Tomio Yoshida "Compatability test for phase-change erasable and WORM media in a multifunction drive", Proc. SPIE 1499, Optical Data Storage '91, (1 July 1991); https://doi.org/10.1117/12.45923

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