Specifications

xiii
Compaq HSG80 Array Controller ACS Version 8.4 Configuration and CLI Reference Guide
Tables
Key to Figure 1–1 The HSG80 Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4
Controller Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–5
Key to Figure 1–2 HSG80 Array Controller Fibre Channel Optical Cabling . . . . 1–8
Key to Figure 1–4 HSG80 Controller Operator Control Panel (OCP) . . . . . . . . . 1–11
Cache Module Memory Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–15
Key to Figure 1–5 Cache Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–16
Key to Figure 1–6 Dual-Battery ECB SBB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–17
ECB Capacity Based on Memory Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–18
Key to Figure 2–2 This Controller and Other Controller . . . . . . . . . . . . . . . . . . . . 2–3
Cache Policies and Cache Module Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–12
Resulting Cache Policies and ECB Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–15
Key to Figure 3–1 Host Bus and Controller Device SCSI Bus . . . . . . . . . . . . . . . 3–3
Key to Figure 3–5 Locating Devices using PTLs . . . . . . . . . . . . . . . . . . . . . . . . . . 3–9
Controller Limitations for RAIDsets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3
A Comparison of Different Kinds of Storagesets . . . . . . . . . . . . . . . . . . . . . . . . . . 4–8
Key to Figure 4–4 Distribute Members across Device Ports . . . . . . . . . . . . . . . . 4–12
Key to Figure 4–6 First Mirrorset Members on Different Buses . . . . . . . . . . . . . 4–15
Maximum Chunk Sizes for a RAIDset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–46
Key to Figure 5–2 Example Cabling for a Single Configuration using
Two Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–8
Key to Figure 5–3 Example Cabling for a Single Configuration using
One Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–10
Key to Figure 5–4 Example Cabling in Transparent Failover using
Two Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–15
Figure 5–5 Example Cabling for Transparent Failover with One Switch . . . . . . 5–18
Key to Figure 5–6 Example Cabling in Multiple-Bus Failover:
Configuration 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–24