3)After completion of data transfer of hit data, the disk drive performs the
HAP
Read-ahead data
DAP
4)Finally, the cache data in the buffer is as follows.
Read-ahead data
Start LBA | Last LBA |
(3)Full hit (hit all)
All requested data are stored in the data buffer. The disk drive starts transferring the requested data from the address of which the requested data is stored. After completion of command, a previously existed cache data before the full hit reading are still kept in the buffer, and the disk drive does not perform the
1)In the case that the contents of the data buffer is as follows for example and the previous command is a sequential read command, the disk drive sets the HAP to the address of which the hit data is stored.
Last position at previous read command
HAP | HAP (set to hit position for data transfer) |
Cache data | Full hit data |
Cache data
DAP
Last position at previous read command
6 - 19 |
