Fujitsu ETERNUS DX60 S3 User Manual page 871

Appendix A Parameter List
A.4 Connectivity Management
• LUN Expand Mode
(Peripheral Device Addressing)
Description
Input condition/
Display contents
This parameter is available only when the LUN addressing setting is "Peripheral device addressing (Default)".
●
ALUA Settings
• Asymmetric / Symmetric Logical Unit Access
Description
Input condition/
Display contents
•
This parameter is only available when the TPGS mode is "Enable (Default)". Note that this parameter is enabled
regardless of the TPGS mode setting when the ETERNUS Multipath Driver is used.
•
For storage systems other than the ETERNUS DX8700 S3/DX8900 S3, when setting "ACTIVE/ACTIVE", a data
migration occurs between CMs and there may be a reduction in performance.
• TPGS Mode
Description
Input condition/
Display contents
Select the LUN expand mode.
When expanding the maximum LUNs that can be mapped to 4096, select "Enable".
When the maximum LUNs that can be mapped are not expanded, select "Disable
(Default)".
•
Enable
•
Disable (Default)
Select the access type from the host to a volume.
•
ACTIVE-ACTIVE / PREFERRED_PATH
There are recommended paths and non-recommended paths for each volume. By
using a CA port in the Controlling CM of a RAID group in which the volume belongs
for the recommended paths (other ports are regarded as non-recommended paths),
data migration between CMs (cross access) can be reduced.
•
ACTIVE / ACTIVE
All of the paths to the volume are regarded as being recommended paths. The
multipath driver decides which paths are used.
•
For the ETERNUS DX60 S3/DX100 S3/DX200 S3, the ETERNUS DX500 S3/DX600 S3,
and the ETERNUS DX200F:
-
ACTIVE-ACTIVE / PREFERRED_PATH (Default)
-
ACTIVE/ACTIVE
•
For the ETERNUS DX8700 S3/DX8900 S3
-
ACTIVE-ACTIVE/PREFERRED_PATH
-
ACTIVE/ACTIVE (Default)
Select "Enable (Default)" or "Disable" for the Target Port Group Support (TPGS) mode.
TPGS is a standard that is used to achieve ALUA for multipath control. By notifying the
path status (recommend or non-recommend) of each volume, the selection conditions
of paths for multipath control can be determined. If the TPGS mode is "Disable", the
multipath driver that is being used decides which ports are used.
•
Enable (Default)
•
Disable
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