Fujitsu MHZ2320BJ User Manual

6.4 Read-ahead 

Cache ..........................................................................................6-13

 

6.4.1  Data buffer structure ..........................................................................6-13

 

6.4.2 Caching 

operation ..............................................................................6-14

 

6.4.3  Using the read segment buffer ...........................................................6-16

 

6.5 Write 

Cache....................................................................................................6-20

 

6.5.1 Cache 

operation .................................................................................6-20

 

 

 

7.1 Maintenance .....................................................................................................7-2

 

7.1.1  Rules for maintenance..........................................................................7-2

 

7.1.2 Maintenance 

requirements ...................................................................7-3

 

7.1.3 Maintenance 

levels...............................................................................7-5

 

7.1.4  Disk drive revision number..................................................................7-6

 

7.1.5  Tools and test equipment .....................................................................7-8

 

7.1.6 Self-diagnostics....................................................................................7-8

 

7.1.7 Test.......................................................................................................7-8

 

7.2 Operation 

Confirmation .................................................................................7-11

 

7.2.1 Operation 

test .....................................................................................7-11

 

7.2.2 Diagnostic 

test....................................................................................7-11

 

7.3 Troubleshooting 

Procedure ............................................................................7-12

 

7.3.1 Troubleshooting 

procedure ................................................................7-12

 

7.3.2  Troubleshooting disk drive replaced in field .....................................7-12

 

7.3.3  Troubleshooting at factory .................................................................7-14

 

7.4  Disk Drive Removal Procedure......................................................................7-15

 

7.5  Spare Disk Drive ............................................................................................7-15 

xiv 

C141-E280