Hp XP P9500 Storage User Manual download pdf (Page 21)

When you restore a path with higher priority than the currently-used path, I/O is switched to the

restored path.

Multi path mode

For Multi path mode, all paths are used for I/O to the external volume. This distributes workload

in a round-robin process.

The following figure illustrates how failure is handled with redundant paths in Multi mode.

Planning external paths and path groups 21

1 2 ... 16 17 18 19 20 21 22 23 24 25 26 ... 121 122

Abstract 1
Contents 3
4 Contents 4
Contents 5 5
6 Contents 6
1 Overview 7
Typical components 8
External storage system 9
External volume 9
Internal volume 9
Interfaces 9
Spreadsheets 10
2 Requirements and planning 11
Planning external volumes 13
14 Requirements and planning 14
Mainframe volumes 15
Open systems volumes 16
External volume groups (ExGs) 16
Planning external volumes 19 19
External paths 20
Multi path mode 21
22 Requirements and planning 22
Direct connection 23
Switch connection 23
Default mapping settings 24
Cache Residency 25
Snapshot 25
Smart Tiers Z, and Fast Snap 26
Local replication software 26
LUN Expansion 27
Remote replication software 28
4 Setting up external volumes 29
Mapping an external volume 30
Mapping an external volume 31 31
Mapping an external volume 33 33
Using mapped volumes 35
5 Monitoring and maintenance 36
38 Monitoring and maintenance 38
Editing external WWN settings 39
Path maintenance 40
Path maintenance 41 41
Reconnecting an external path 42
Path maintenance 43 43
Replacing all external paths 44
Prerequisite requirements 45
46 Monitoring and maintenance 46
◦ A pool-VOL 48
50 Monitoring and maintenance 50
6 Support and other resources 52
Typographic conventions 53
General troubleshooting 54
• Illegal request 57
• Cannot detect port 57
HP1024/HP128 Disk Array 58
HP512/HP48 Disk Array 59
Thunder 9500V 59
HUS/AMS/WMS 60
External systems 62
HUS VM Storage System 62
HP P9500 62
HP24000/HP20000 Disk Array 62
AMS 2000 series guidelines 67
SVS200 storage system 68
EVA storage system 68
Sun StorEdge 6120/6320 69
Sun StorageTek FlexLine 380 69
Sun StorageTek 2540 69
Sun StorageTek V2X2 70
EMC CLARiiON CX series 70
EMC VNX series 70
EMC Symmetrix series 71
IBM V7000 series 71
IBM SVC series 71
IBM XIV series 72
Fujitsu FibreCAT CX series 72
SGI IS4600 series 73
B Remote command devices 76
Requirements 77
Mapping a command device 78
SANRISE9500V series 79
Thunder 9500V series 79
Mapping a command device 79 79
Manager commands 80
Storage window 81
External Storage Systems tab 82
External Paths tab 82
External Path Groups tab 85
• Summary (page 86) 86
Mapped Volumes tab 87
Add External Volumes wizard 89
Add External Volumes window 90
Selected External Volumes 93
Edit Policies window 97
Edit External Volumes wizard 99
Confirm window 100
Edit External WWNs wizard 103
Edit External WWNs window 104
Selected External Paths table 110
Change Settings window 112
Assign Processor Blade wizard 117
LDEVs table 119
Glossary 120
122 Index 122

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