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Note:
If you format the mapped volume of the external storage system from the external storage system
side, the existing data before formatting cannot be assured. When you use the mapped external volume
from the mainframe OS, format the mapped volume from the local storage system side.
For the procedure of the volume formatting operation and the Write to Control Blocks operation, see the
HP StorageWorks XP24000 Virtual LVI/LUN (VLL) and Volume Shredder User’s Guide.
Connecting Open Systems Volumes
Open systems
volumes in external storage system connect to and are recognized by the storage system
as open syst
ems volumes, without requiring reformatting. Reformatting is not required because the
connection
between the storage system and the external storage system is Fibre Channel. If you need
to initiali
ze the data area for the volume, format the volume using the VLL function. For the procedure
of the volu
me formatting operation, see the HP StorageWorks XP24000 Virtual LVI/LUN (VLL) and
Volume Shredder User’s Guide.
OPEN-V emulation is recommended because, in most cases, OPEN-V emulation provides the most
efficient u
se of storage and the best performance. Also, emulation types other than OPEN-V may not
retain ex
isting data after being mapped.
Choosing Mapping Policy
Policy is a list of settings of the necessary information for mapping the external volume. By setting the
mapping policy in advance, the setting at the time of mapping will be easier.
Two policies are prepared in advance. The user can change the default value of the policy. For details on
the default value, see “Edit Policy Dialog Box” on page 95.
Difference between Automatic Mapping and Manual Mapping
When you map the external volume, you need to configure:
• cross-subsystem paths
• extern
al volume parameters
• LDEV number to LDEVs in the external volume
• SSID
When yo
u perform automatic mapping, users configure only cross-subsystem paths and all the other
settings above are automatically made by External Storage according to the mapping policy. When you
perform manual mapping, users configure all the settings.
Automatic mapping maps all the external volume found by the Volume Discovery to the internal volumes.
Automatic mapping requires less settings but you are not allowed to set different parameters to each
external volumes or to specify LDEV number to each LDEVs. You can set the parameters such as emulation
type to mapping policy in advance.
For the procedure of automatic mapping, see “Mapping an External Volume Automatically” on page 69.
For the procedure of manual mapping, see “Mapping an External Volume Manually” on page 69.
Port Discovery and Volume Discovery
Port Discovery and Volume Discovery are the methods used to find external volumes, and will be executed
when you map external volumes or when you add cross-subsystem paths.
Port Discovery is a process to search for and get information about target ports of the connected external
storage system from an external port of the local storage system. The latest information about the external
storage system can be displayed in a dialog box of External Storage when you execute Port Discovery.
You can set in advance the mapping policy on whether to execute the Port Discovery automatically or
manually. If Port Discovery is executed automatically, WWNs connected to all the external ports of the
local storage system will be searched for. If Port Discovery is executed manually, you can select a specific
30
About External Storage Operations
- HP StorageWorks 1
- Edition 2
- Description 2
- Contents 3
- Figures 7
- About this Guide 11
- XP External Storage Software 13
- Figure 2 15
- 2 About External Storage 17
- Operations 17
- External Storage Components 18
- Volumes and Mapping Paths 19
- External Storage Operations 20
- Configuring External Storage 20
- Choosing the External Port 21
- Configuring Ex 22
- Cross-subsyste 23
- Connecting Mainframe Volumes 29
- Choosing Mapping Policy 30
- Interope 33
- Continuous Access Operations 36
- Business Copy Operations 39
- XP Snapsh 40
- Figure 18 41
- Capacity Guidelines 45
- Volume Attribute Guidelines 47
- Performan 48
- RAID Level Considerations 48
- Starting Ex 49
- 4UsingtheExternalStorageGUI 51
- Volume Operation Tree 52
- Preview Dialog Box 57
- Path Operation Window 58
- Path Operation Tree 60
- Port Operation Window 63
- Port Operation T 65
- Port Operation List 65
- Setting Por 68
- Mapping an Ex 69
- Caution: 70
- Add Volume Dialog Box 71
- LDEV Mapping (Au 74
- SSID Dialog Box 76
- Configuring Cros 81
- Canceling the Cr 83
- LDEV Information Dialog Box 84
- Displayed Item 86
- Turning On or Of 87
- External Volume 89
- Checking Con 91
- Operation 91
- Resuming an Ind 92
- Restoring the Pa 93
- Changing the I 94
- Editing M 95
- 6 Remote Command Devices 99
- Remote Command Devices 100
- Remote Command Device 102
- : Cable 103
- : Ports of Standard mode 103
- 7 Troubleshooting 107
- Corrective Action 108
- Calling HP Technical Support 111
- Troubleshooting 112
- AConnectingExternalStorage 113
- Systems 113
- System Model 114
- TagmaStore W 115
- Thunder 9500V Storage System 116
- Window Names 117
- Parameters 117
- Parameter Settings 117
- Controller 118
- USP V Storage System 119
- System) 122
- SVS200 Storage System 123
- EVA Storage System 124
- 6120/6320 125
- Non-HP Storage Systems 126
- BRequiredVolumeCapacityfor 127
- Each Emulation Type 127
- Capacity 129
- List for Each Emulation Type 129
- DAcronymsand Abbreviations 135
- Acronyms and Abbreviations 136
- Volume Operation Window,51 138
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