HSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and Configuration Guide

Contents
xiHSG80 ACS Solution Software Version 8.7 for Compaq Tru64 UNIX Installation and
Configuration Guide
Figures
1 General configuration flowchart (panel 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xx
2 General configuration flowchart (panel 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxi
3 Configuring storage with SWCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xxii
1–1 Location of controllers and cache modules in a Model 2200 enclosure. . . . . . 1–2
1–2 Location of controllers and cache modules in a BA370 enclosure. . . . . . . . . . 1–3
1–3 “This controller” and “other controller” for the Model 2200 enclosure. . . . . . 1–4
1–4 “This controller” and “other controller” for the BA370 enclosure. . . . . . . . . . 1–4
1–5 Transparent failover—normal operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–6
1–6 Transparent failover—after failover from controller B to controller A . . . . . . 1–7
1–7 Typical multiple-bus configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–9
1–8 Mirrored caching. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–11
1–9 Connections in separate-link, transparent failover mode configurations . . . . 1–14
1–10 Connections in single-link, transparent failover mode configurations . . . . . . 1–15
1–11 Connections in multiple-bus failover mode . . . . . . . . . . . . . . . . . . . . . . . . . . 1–16
1–12 LUN presentation to hosts, as determined by offset. . . . . . . . . . . . . . . . . . . . 1–18
1–13 Limiting host access in transparent failover mode . . . . . . . . . . . . . . . . . . . . . 1–22
1–14 Limiting host access in multiple-bus failover mode. . . . . . . . . . . . . . . . . . . . 1–25
1–15 Placement of the worldwide name label on the Model 2200 enclosure . . . . . 1–28
1–16 Placement of the worldwide name label on the BA370 enclosure . . . . . . . . . 1–29
2–1 Mapping a unit to physical disk drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
2–2 PTL naming convention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–5
2–3 How data is laid out on disks in BA370 enclosure configuration. . . . . . . . . . . 2–6
2–4 Storage container types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–14
2–5 3-member RAID 0 stripeset (example 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–18
2–6 3-member RAID 0 stripeset (example 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–19
2–7 Mirrorsets maintain two copies of the same data . . . . . . . . . . . . . . . . . . . . . . 2–21
2–8 Mirrorset example 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–21
2–9 5-member RAIDset using parity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–23
2–10 Striped mirrorset (example 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–25
2–11 Striped mirrorset (example 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–25
2–12 One example of a partitioned single-disk unit . . . . . . . . . . . . . . . . . . . . . . . . 2–26
2–13 Large chunk size increases request rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–31
3–1 Dual-Bus Enterprise Storage RAID Array Storage System . . . . . . . . . . . . . . . 3–4
3–2 Single-Bus Enterprise Storage RAID Array Storage System. . . . . . . . . . . . . . 3–5