Compex Systems Advanced SerialRAID Adapters SA33-3285-02 - Manual (Page 5)

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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