Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1996-06-19
1998-05-05
Hindi, Nabil
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369 58, G11B 700
Patent
active
057485895
ABSTRACT:
An optical disk apparatus that does not need the intervention of a host apparatus, such as a host computer, performs a diagnostic method of checking the optical disk apparatus for diagnosis using a diagnostic optical disk medium. Upon the detection of the loading of a diagnostic optical disk medium into an optical disk apparatus, an optical head reads diagnostic information written beforehand on the diagnostic optical disk medium, and a diagnostic operation is carried out to diagnose a writing or reading operation of the optical disk apparatus under the control of a main control circuit without requiring the intervention of a host computer. The results of diagnosis are written on the diagnostic optical disk medium or provided in some other fashion. If the results are stored on the disk, the host computer makes reference to the stored results when necessary.
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patent: 4969139 (1990-11-01), Awmatam et al.
patent: 5119291 (1992-06-01), Flannagan et al.
patent: 5537537 (1996-07-01), Fujikawa et al.
"SCSI Working Draft, X3T9.2 375R, Revision 10K", p. 117 and pp. 130-131.
Technical Guide Optical Drives and Libraries TGODL, HP Co., pp. 2-73 -2-84.
Hindi Nabil
Hitachi , Ltd.
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