Contents
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
CHAPTER 7
Maintenance and Diagnosis
.....................................................
7-1
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
Glossary
...........................................................................................................
GL-1
Acronyms and Abbreviations
.........................................................................
AB-1
Index
.................................................................................................................
IN-1
xiv
C141-E293