Hp NonStop G-Series User Manual download pdf (Page 141)

ServerNet Nomadic Disk (Release 2) User’s Guide—523968-001

B-1

Operational Considerations for

Remote Mirroring

Powering On and Off a Remote I/O Enclosure B-2

Powering On a System With a Remote I/O Enclosure B-2

Powering Off a System With a Remote I/O Enclosure B-3

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ServerNet Nomadic 1
Disk (Release 2) 1
User’s Guide 1
Document History 2
ServerNet Nomadic Disk 3
(Release 2) User’s Guide 3
4. Switch Modules 4
5. Switchovers 4
Contents 5
A. Part Numbers 6
What’s New in This Manual 9
Installing and Configuring 10
About This Guide 11
Where to Get More Information 12
Your Comments Invited 12
Notation Conventions 13
General Syntax Notation 14
Notation for Messages 15
Abbreviations 17
Remote Disk Drive Mirroring 20
Switchover 21
Supported Database Products 24
Nomadic Disk Hardware and 25
Software 25
Nomadic Disk Software 26
Nomadic Disk Hardware 27
VST205.vsd 28
VST206.vsd 29
Hardware Item Function 31
Troubleshooting 31
Information 31
VST203.vsd 32
Nomadic Disk Manager 35
Nomadic Disk Manager Files 36
ADD DEFINE Statement 42
ADD SEGMENT Statement 43
PROCESS Statement 45
SET PATH Statement 47
SET VOL Statement 48
4 Switch Modules 51
Switch Modules 52
Switch Controller Card 53
SCC Key Switch 54
SCC Temperature Sensors 54
SCC LEDs 55
Switch Card 56
Switch Card Toggle Switches 58
Switch Card LEDs 59
5 Switchovers 61
Preparing for a Switchover 62
Switchover Examples 62
Assumptions 63
Opposite Position 64
Planned Switchovers 64
On Primary node \PRI 65
Unplanned Switchovers 66
From the Primary Node \PRI 67
From the Backup Node \BCK 67
Switchback 68
On the Primary Node \PRI 69
Switchovers 70
Communications 73
Switch Module Device Name 75
Starting SWCI 76
Stopping SWCI 77
SWCI Commands 77
Command 78
Type Page Function 78
ALARM Command 79
Consideration 79
LOCK Command 81
LOG Command 82
OBEY Command 83
SELFTEST Command 84
STATUS Commands 85
Heading Field Contents 87
SWITCH Command 92
UNLOCK Command 94
Considerations 94
SWCI Messages 95
Environmental Alert Messages 119
Considerations 122
Command Description Page 123
ASSUME Command 125
Examples 125
DOWN Command 126
EXIT Command 127
GIVE Command 127
HELP Command 129
HISTORY Command 129
LISTDEV Command 130
LISTOPENS Command 130
OUT Command 131
RESET Command 132
SEGMENTS Command 133
SQL Command 133
STATUS Command 133
TAKE Command 135
TMF Command 137
UP Command 137
VOLUMES Command 138
A Part Numbers 139
Part Numbers 140
Remote Mirroring 141

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