Lun Group Management; Add Lun Group - Fujitsu ETERNUS DX60 S3 User Manual

Chapter 4 Connectivity Management

4.4 LUN Group Management

4.4

LUN Group Management

This section describes LUN group management.
LUN group management provides the following functions:

• Add LUN Group

• Delete LUN Group
• Modify LUN Group
4.4.1 Add LUN Group
This function creates a new LUN group, and allocates a volume number in the ETERNUS DX to the LUN, which
can be recognized by the host.
The following list shows the maximum number of LUN groups that can be created for each model.
• ETERNUS DX60 S3
128
• ETERNUS DX100 S3/DX200 S3
1024
• ETERNUS DX500 S3/DX600 S3
1024
• ETERNUS DX8700 S3/DX8900 S3
6144
• ETERNUS DX200F
1024
• Only the volumes with "Standard", "WSV", "TPV", "FTV", or "SDV" volume types can be registered in the LUN
group. "SDPV" volumes cannot be registered in the LUN group.
• A LUN group cannot be created when no volumes have been registered in the ETERNUS DX.
• Up to 4096 LUNs can be created. If the host affinity setting is performed for the host groups or hosts to
which the host response setting has been allocated, the LUNs that can be recognized by the host vary
depending on the host response setting. Refer to
details.
- When the number of recognizable LUN is "256 LUN"
256 LUNs (LUN#0 - LUN#255) can be accessed (LUN#256 - LUN#4095 cannot be accessed)
- When the number of recognizable LUN is "4096 LUN"
4096 LUNs (LUN#0 - LUN#4095) can be accessed
• Note that if a LUN group to which volumes are mapped from LUN#512 onward exists, the maximum
number of LUN groups cannot be created.
This is because when volumes are mapped for LUN#512 onward, an additional LUN group is created as an
internal resource for every 512 LUNs. For example, when volumes are mapped from LUN#0 to LUN#520,
two LUN groups are created (one for LUNs #0 to #511 and one for LUNs #512 to #520).
"Host responses and recognizable LUNs" (page 818)
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