User`s guide

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2.1.11 Dual Controller Port ...................................... 2–12

2.2 HS Array Controller Firmware Overview . . ....................... 2–12

2.2.1 Core Functions . . . ........................................ 2–13

2.2.1.1 Controller Self-Test and Diagnostics ....................... 2–13

2.2.1.2 Executive Functions .................................... 2–13

2.2.2 Host Interconnect Functions ................................ 2–13

2.2.3 Operator Interface and Subsystem Management Functions . . ....... 2–14

2.2.3.1 Command Line Interpreter .............................. 2–14

2.2.3.2 Diagnostic Utility Protocol ............................... 2–14

2.2.3.3 HSZ Array Controller Virtual Terminal Connection ............ 2–14

2.2.3.4 Local Programs ....................................... 2–14

2.2.3.5 Error Logging and Fault Management ...................... 2–15

2.2.4 Device Services . . ........................................ 2–15

2.2.5 Value-Added Functions .................................... 2–15

2.3 What Is Failover? ............................................ 2–16

2.3.1 Setting Failover . . ........................................ 2–17

2.3.2 Exiting Failover . . ........................................ 2–18

2.3.3 Taking Controllers Out of Failover............................ 2–18

2.3.4 Using Failover Commands When Write-Back Cache Is in Use....... 2–19

2.3.5 Resolving a Conﬁguration Mismatch after a Hardware Mismatch .... 2–19

2.4 HSZ Array Controller Failover Operation . . ....................... 2–20

2.4.1 Transparent Controller Failover Resulting from a Fault ........... 2–20

2.4.2 Transparent Controller Failover Resulting from Operator Action .... 2–22

3 Conﬁguration Rules and Restrictions

3.1 Ordering Considerations ...................................... 3–1

3.2 Cabinets . . . ................................................ 3–1

3.2.1 SW800-Series Data Center Cabinet ........................... 3–2

3.2.2 SW500-Series Cabinets .................................... 3–6

3.2.3 SW300-Series Deskside RAID Enclosure ....................... 3–8

3.2.4 Shelves. ................................................ 3–9

3.2.4.1 BA350-Series . ........................................ 3–10

3.2.4.2 SW300-Series Cabinet Shelf.............................. 3–11

3.3 Controllers . ................................................ 3–12

3.3.1 Nonredundant HS Array Controller Conﬁgurations ............... 3–13

3.3.2 Dual-Redundant HS Array Controller Conﬁgurations ............. 3–13

3.3.3 Optimal Performance Conﬁgurations . . . ....................... 3–14

3.3.4 Optimal Availability Conﬁgurations ........................... 3–15

3.4 Typical and Recommended Conﬁgurations . . ....................... 3–17

3.4.1 3½-Inch SBB Restrictions . . ................................ 3–17

3.4.2 3½-Inch SBB Recommended Conﬁgurations .................... 3–17

3.4.3 5¼-Inch SBB Restrictions . . ................................ 3–19

3.4.4 5¼-Inch SBB Recommended Conﬁgurations .................... 3–20

3.4.5 Intermixing 5¼-Inch and 3½-Inch SBBs ....................... 3–21

3.4.6 Atypical Conﬁgurations .................................... 3–21

3.4.7 SW300-Series Cabinet Deskside RAID Conﬁguration ............. 3–22

3.5 Host Port Cable Lengths ...................................... 3–24

3.6 CD–ROM Restrictions ........................................ 3–25

3.7 Host Adapter Support ........................................ 3–25

3.7.1 HSJ Array Controllers Host Adapter Support ................... 3–25

3.7.2 HSD30 Array Controller Host Adapter Support . . . ............... 3–25

3.7.3 HSZ Array Controller Host Adapter Support .................... 3–26