Fujitsu MHM2150AT Manual/User Guide - Page 217
Empty area, Mis-hit data, Requested data, HAP Completion of transferring requested data
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Operations 1) At receiving the sequential read command, the disk drive sets the DAP and HAP to the start address of the segment and reads the requested data from the load of the segment. HAP Mis-hit data Empty area DAP 2) The disk drive transfers the requested data that is already read to the host system with reading the requested data. HAP Requested data Mis-hit data Empty area DAP 3) After completion of the reading and transferring the requested data to the host system, the disk drive performs the read-ahead operation continuously. HAP (Completion of transferring requested data) Requested data Read-ahead data Empty area DAP 4) The disk drive performs the read-ahead operation for all area of segment with overwriting the requested data. Finally, the cache data in the buffer is as follows. HAP Read-ahead data DAP Last LBA Start LBA 6-18 C141-E104-03EN