Appeal No. 1999-0264
Application No. 08/573,582
pending in the application.
The invention relates to a disk storage device for
recording and reproducing data in accordance with a command
given by a higher ranking device (i.e., a host computer). A
data transfer control circuit transfers data to and from the
higher ranking device (Specification, page 40, lines 16-18).
Identification information is provided on the storage medium
itself (Specification, page 42, lines 23-26), and/or in a
separate memory within the disk storage device (Specification,
page 42, lines 2-3), indicating whether data is permitted to
be, or is inhibited from, being written into a predetermined
area of the storage medium. The disk storage device includes
a microprocessor which collates a state of the data write
command with identification information for a predetermined
sector of the storage medium (Specification, page 42, line 27
to page 43, line 21); and when at least one of the data write
command and the identification information indicates data
write inhibition when a data write operation is requested by
the higher ranking device, the microprocessor informs the
higher ranking device of a write inhibition error. A state
2
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