Compaq Infortrend manual Redundant Controller, 10-14, 10-19

	Idle Drive Failure Detection	23
	Periodic Auto-Detect Failure Drive Swap Check Time	23
9.3	Monitoring and Safety Mechanisms	25
	Dynamic Switch Write-Policy	25
	View Peripheral Device Status	25
	Controller Auto-Shutdown - Event Trigger Option	26
9.4	Disk Array Parameters	27
	Rebuild Priority	27
	Verification on Writes	28

Chapter 10 Redundant Controller

10.1 Operation Theory		10-1
10.1.1	Setup Flowchart	10-2
10.1.2	Considerations Related to Physical Connection	10-2
SCSI-Based Controllers		10-2
Fibre-Based Controllers		10-3
10.1.3 Grouping Hard Drives and LUN Mapping		10-4
Logical Drive, Logical Volume, and Logical Partitions		10-5
System Drive Mapping:		10-6
Primary and Secondary IDs		10-6
Mapping		10-7
10.1.4	Fault-Tolerance	10-8
What Is a Redundant Controller Configuration?		10-8
How does Failover and Failback Work?		10-9
A. Channel Bus		10-9
B. Controller Failover and Failback		10-11
C. Active-to-Active Configuration:		10-11
D. Traffic Distribution and Failover Process		10-12
Symptoms		10-13
Connection:		10-13

10.2 Preparing Controllers		10-14
10.2.1	Requirements:	10-14
Cabling Requirements:		10-14
Controller Settings:		10-15
10.2.2	Limitations	10-16
10.2.3	Configurable Parameters	10-16
Primary or Secondary		10-16
Active-to-Active Configuration		10-17
Active-to-Standby Configuration		10-17
Cache Synchronization		10-17
Battery Support		10-17

10.3 Configuration		10-19
10.3.1 Via Front Panel Keypad		10-20
Redundant Configuration Using Automatic Setting		10-20
Enable Redundant Controller		10-20
Autoconfig		10-20
2.	Controller Unique ID	10-20
Redundant Configuration Using Manual Setting		10-21
1.	Enable Redundant Controller	10-21
2.	Controller Unique ID	10-21
Starting the Redundant Controllers		10-22
Creating Primary and Secondary ID		10-22
Drive Channel		10-22
Host Channel		10-23
Assigning a Logical Drive/Logical Volume to the Secondary Controller		10-23

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