System and method for allocating a write request on the same cylinder as a most recent read request on a rotating memory
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United States of America Patent
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Dec 9, 1997
Grant Date -
N/A
app pub date -
Nov 15, 1991
filing date -
Dec 11, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A rotating memory system (e.g. a disk memory) in which a write request is allocated a physical block preferentially on the cylinder on which read/write heads are currently located. This reduces the amount of head movement and hence speeds up the access time. A block map is maintained to convert between the logical block numbers used by read and write requests and the physical block numbers which identify the physical locations of the blocks in the memory.
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