Fujitsu MHS2030AT - 2.5" Notebook 30GB Drive Product Manual page 237

6.4.3.4 Partial hit
In this situation, a part of read requested data including the top sector is stored in
the data buffer. A transfer of the read requested data starts from the address
where the data that is hit is stored until the top sector of the read requested data.
Remaining part of insufficient data is read then.
An example is a case where a partial hit occurs in cache data, as shown below.
START LBA
1) HAP is set at the address where partial hit data is stored. DAP is then set to
the address immediately after the partial hit data.
2) At the same time as a transfer of the partial hit data starts, insufficient data is
read.
C141-E171-03EN
Cache valid data
HAP
Partial hit data
Read requested data to be transferred
Partial hit data
6.4 Read-ahead Cache
LAST LBA
Insufficient data
DAP
Insufficient data
HAP
(stop)
DAP
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