Appeal No. 1999-0264
Application No. 08/573,582
1523, 1529 (Fed. Cir. 1998).
Appellants' claim 1 recites a disk storage device for
recording and reproducing data to and from a storage medium
according to a command given by a higher rank device,
comprising data transfer control means (between the higher
rank device and the storage medium); identification means
having information present in the disk storage device for
determining write permission or inhibition for a predetermined
recording area of the storage medium; data transfer command
means responsive to a data write command together with data
write inhibition from the higher rank device; identification
information indicating write inhibition being set in a
separate memory within the data storage device; a
microprocessor that collates the state of the data write
command with identification information for a predetermined
sector, and which informs the higher rank device of a write
inhibition error when appropriate; a state display means that
displays a data write inhibition error when so instructed by
the microprocessor; and when a data write command and data
write inhibition are both sent by the higher rank device, the
microprocessor determines whether the predetermined sector is
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