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HP Surestore Disk Array 12h System Administrator's Guide for HP-UX, MPE, and W - Page 148

Switching Primary Controllers, Setting Data Resiliency, type

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MPE Using the ARM Command Line Utilities for MPE Performing Disk Array Maintenance Tasks Switching Primary Controllers In dual-controller disk array configurations, the array automatically switches to the secondary controller if the primary controller fails. However, you can switch controllers manually if necessary. This will cause the secondary controller to assume the role of primary controller. To switch primary controllers, type: arraymgr -c { X | Y } Setting Data Resiliency The data map contents stored in the disk array controller NVRAM is copied to two disks on the array at regular intervals to protect against map loss. The interval at which the disks are updated with recovery map information is controlled using the data resiliency setting. Selecting a data resiliency setting involves making a tradeoff between data protection and performance. The more frequently the recovery maps are updated, the more impact it may have on performance. 148

Section	Page
Table of Contents	5
Managing the HP SureStore E Disk Array 12H on HP-UX	13
Disk Array Management Tools	14
Which Tools to Use for Each Task	15
Installing the Disk Array Management Software	16
Tips for Configuring the Disk Array On HP-UX	17
Using the HP-UX System Administration Manager	19
Selecting Hardware Paths on HP-UX 10.20	20
Configuring a New Disk Array	23
Checking Disk Array Status	24
Changing Disk Array Configuration Settings	24
Managing LUNs (Logical Drives)	25
Adding a Disk	28
Rebuilding the Disk Array	31
Switching Primary Controllers	32
Using the ARM Command Line Utilities for HP-UX	33
Information in man pages	33
Command Syntax Conventions	34
The ARMServer Process	34
The Array Monitor Daemon (arraymond)	35
Selecting a Disk Array to Manage	36
Configuring a New Disk Array	37
Checking Disk Array Status	39
Displaying Disk Array Serial Numbers	40
Changing Disk Array Configuration Settings	40
Managing LUNs (Logical Drives)	42
Adding a Disk	44
Rebuilding the Disk Array	46
Analyzing Disk Array Performance	48
Performing Disk Array Maintenance Tasks	50
Downloading Firmware	59
Recovering Data Maps	62
Viewing the Disk Array General Configuration Settings	64
Using the ARDIAG Offline Diagnostic on HP-UX	73
Operating environment	73
Definition of Terms	74
ARDIAG Operational Commands	75
ARDIAG Interface Commands	76
Operational Command Descriptions	77
Interface command descriptions	105
ODE interface	111
ARDIAG interface to ODE	113
Managing the HP SureStore E Disk Array 12H on MPE	115
Disk Array Management Tools	116
Which Tools to Use for Each Task	117
Installing the Disk Array Management Software	118
Tips for Configuring the Disk Array On MPE	119
Configuring AutoRAID SCSI LUNs for MPE/iX	121
Using the ARM Command Line Utilities for MPE	125
Setting Up MPE POSIX Shell	125
Information in man pages	126
Command Syntax Conventions	126
The ARMServer Process	127
Selecting a Disk Array to Manage	128
Configuring a New Disk Array	129
Checking Disk Array Status	131
Displaying Disk Array Serial Numbers	132
Changing Disk Array Configuration Settings	132
Managing LUNs (Logical Drives)	134
Adding a Disk	136
Rebuilding the Disk Array	138
Analyzing Disk Array Performance	140
Performing Disk Array Maintenance Tasks	142
Downloading Firmware	151
Recovering Data Maps	153
Viewing the Disk Array General Configuration Settings	155
Using the ARDIAG Offline Diagnostic on MPE	165
Operating environment	165
Definition of Terms	166
ARDIAG Operational Commands	167
ARDIAG Interface Commands	168
Operational Command Descriptions	169
Interface command descriptions	197
ODE interface	203
ARDIAG interface to ODE	205
Managing the HP SureStore E Disk Array 12H on Windows NT	207
AutoRAID Manager Components	208
HP OpenView Integration	209
System Requirements	210
Installing AutoRAID Manager Software	211
Setting Up AutoRAID Manager for Windows NT	214
DiscoveringDisk Arrays	219
Managing Disk Arrays on a Remote Host	219
Editing the Disk Array List	220
Solving Common Installation Problems	220
Using AutoRAID Manager for Windows NT	223
Online Help	223
Selecting a Disk Array	223
Configuring a New Disk Array	224
Checking Disk Array Status	224
Changing Disk Array Configuration Settings	225
Managing Logical Drives	226
Adding a Disk	228
Rebuilding the Disk Array	230
Analyzing Disk Array Performance	232
Performing Disk Array Maintenance Tasks	234
Downloading Controller Firmware	239
Using the ARM Command Line Utilities for Windows NT	241
Online Help	241
Command Syntax Conventions	242
Selecting a Disk Array to Manage	242
Configuring a New Disk Array	243
Checking Disk Array Status	244
Displaying Disk Array Serial Numbers	245
Changing Disk Array Configuration Settings	246
Managing Logical Drives	247
Adding a Disk	249
Rebuilding the Disk Array	251
Analyzing Disk Array Performance	253
Performing Disk Array Maintenance Tasks	254
Downloading Firmware	260

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Using the ARM Command Line Utilities for MPE

Performing Disk Array Maintenance Tasks

148

MPE

Switching Primary Controllers

In dual-controller disk array configurations, the array automatically switches to the secondary controller if

the primary controller fails. However, you can switch controllers manually if necessary. This will cause the

secondary controller to assume the role of primary controller.

To switch primary controllers, type:

arraymgr -c { X | Y } <array-id

Setting Data Resiliency

The data map contents stored in the disk array controller NVRAM is copied to two disks on the array at

regular intervals to protect against map loss. The interval at which the disks are updated with recovery map

information is controlled using the data resiliency setting. Selecting a data resiliency setting involves

making a tradeoff between data protection and performance. The more frequently the recovery maps are

updated, the more impact it may have on performance.