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C141-E045-02EN6 - 16
1) Sets the host address pointer (HAP) and the disk address pointer (DAP) to the lead of
segment.
Segment only for read
DAP
HAP
2) Transfers the requested data that already read to the host system with reading the requested
data from the disk media.
Read-requested data
Stores the read-requested
data upto this point
Empty area
DAP
HAP
3) After reading the requested data and transferring the requested data to the host system had
been completed, the disk drive stops command execution without performing the read-
ahead operation.
Read-requested data
Empty area
DAP
(stopped)
(stopped)
HAP
4) Following shows the cache enabled data for next read command.
Cache enabled data
Empty area
Last LBAStart LBA