HP 9800 SERIES Service Manual

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Chapter 4: Status Display Board Diagnosis
Introduction ........................................................................ 4-1
General Description of Diagnosis Method
.............................................. 4-1
Self-Test Initiation
................................................................... 4-2
T est Selection
....................................................................... 4-2
Default Self-Test
................................................................ 4-2
Read-Only Self-Test
............................................................. 4-2
Write/Read Self-Test ............................................................ 4-2
Using the Status Display Board for Failure Analysis ..................................... 4-4
Obtaining Test Results From LED Display ............................................. 4-4
Error Rate Testing With the Status Display Board ...................................... 4-6
Chapter 5: Replaceable Parts
Introduction ........................................................................ 5-1
Appendix A: HP 9895A Disc Memory Command Set
Introduction ............................. ~ .......................................... A-I
Command Compatibility ............................................................. A-2
Command Sequences ............................................................... A-2
Parallel Poll Response
............................................................... A-3
Cylinder
and Track Numbering ....................................................... A-3
Target Addressing
................................................................... A-4
The D Bit
........................................................................... A-4
HP and IBM Formats ................................................................ A-5
Loading of
the Recording Heads ..................................................... A-5
Holdoffs
........................................................................... A-6
Command Execution Checks ......................................................... A-8
Commands ......................................................................... A-9
Sense
Commands ................................................................. A-II
Identify ........................................................................ A-II
DSJ ............................................................................ A-II
Read Self-Test Results .......................................................... A-I3
Read Loopback Record ......................................................... A-I4
Request Status ................................................................. A-I5
Request (Logical) Disc Address .................................................. A-20
Request (Physical) Disc Address ................................................. A-2I

HP 9800 SERIES Specifications

General

Category	Storage
Series	9800 SERIES
Type	Disk Array
Drive Types Supported	SAS, SSD
RAID Levels Supported	0, 1, 5, 6, 10
Host Connectivity	Fibre Channel, iSCSI, SAS
Redundancy	Redundant power supplies and fans