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Contents
Safety Notices........................xv
Definitions of Safety Notices ...................xv
Safety Notice for Installing, Relocating, or Servicing............xv
About This Book ......................xvii
Who Should Use This Book ...................xvii
What This Book Contains ....................xvii
If You Need More Information...................xvii
Web Support Pages......................xviii
Numbering Convention.....................xviii
Part 1. User Information ........................1
Chapter 1. Introducing SSA and the Advanced SerialRAID Adapters .....3
Serial Storage Architecture (SSA) ..................3
The Advanced SerialRAID Adapters (type 4–P).............4
Fast-Write Cache Feature ...................5
128 MB Memory Module Feature .................5
Lights of the Advanced SerialRAID Adapters .............6
Port Addresses of the Advanced SerialRAID Adapters ..........6
SSA Adapter ID during Bring-Up ..................6
Chapter 2. Introducing SSA Loops .................7
Loops, Links, and Data Paths ...................7
Simple Loop ........................8
Simple Loop — One Disk Drive Missing ...............9
Simple Loop — Two Disk Drives Missing ..............10
One Loop with Two Adapters in One Using System ...........11
One Loop with Two Adapters in Each of Two Using Systems .......12
Two Loops with One Adapter ..................14
Two Loops with Two Adapters ..................15
Large Configurations ......................16
Switching Off Using Systems ..................17
Switching On Using Systems ..................17
Configuring Devices on an SSA Loop ................18
SSA Link Speed .......................18
Identifying and Addressing SSA Devices ...............19
Location Code Format ....................19
Pdisks, Hdisks, and Disk Drive Identification .............19
SSA Unique IDs ......................21
Rules for SSA Loops ......................22
Checking the Level of the Adapter Microcode..............23
Rules for the Physical Relationship between Disk Drives and Adapters .....24
One Pair of Adapter Connectors in the Loop .............24
Pairs of Adapter Connectors in the Loop – Some Shared Data .......25
Pairs Of Adapter Connectors in the Loop – Mainly Shared Data ......26
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