Compaq External RAID Controller & Subsystem Manuale Utente Scaricare il pdf (Pagina 10)

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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Compaq External RAID Controller & Subsystem Manuale Utente Pagina 10

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Compaq External RAID Controller & Subsystem Manuale Utente Pagina 10

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