1)The disk drive sets the HAP to the address where the partially hit data is stored, and sets the DAP to the address just after the partially hit data.

HAP

Partially hit data

Lack data

DAP

2)The disk drive starts transferring partially hit data and reads lack data from the disk media at the same time. However, the disk drive does not perform the read-ahead operation newly.

 

 

HAP

 

Requested data to be transferred

(stopped)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Partially hit data

Lack data

DAP

(stopped)

3)The cache data for next read command is as follows.

Cache data

Start LBA

Last LBA

C141-E045-02EN

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Fujitsu MPB3032AT, MPB3054AT, MPB3052AT, MPB3021AT, MPB3043AT manual Partially hit data Lack data