Fujitsu MHS2020AT, Product Manual, Page: 17 / 254

Contents
C141-E171-03EN xiii
6.1.4 Response to diagnostic command .........................................................6-6
6.2 Power Save..............................................................................................6-7
6.2.1 Power save mode...................................................................................6-7
6.2.2 Power commands ..................................................................................6-9
6.3 Defect Processing....................................................................................6-9
6.3.1 Spare area ..............................................................................................6-9
6.3.2 Alternating processing for defective sectors.......................................6-10
6.4 Read-ahead Cache .................................................................................6-12
6.4.1 Data buffer structure ...........................................................................6-12
6.4.2 Caching operation ...............................................................................6-12
6.4.3 Using the read segment buffer ............................................................6-15
6.4.3.1 Miss-hit (no hit) ................................................................................6-15
6.4.3.2 Sequential reading.............................................................................6-16
6.4.3.3 Full hit ...............................................................................................6-18
6.4.3.4 Partial hit ...........................................................................................6-19
6.5 Write Cache...........................................................................................6-20
6.5.1 Caching operation ...............................................................................6-20
Glossary ........................................................................................................... GL-1
Acronyms and Abbreviations .........................................................................AB-1
Index ................................................................................................................. IN-1