HP XP P9500 Storage - Manual (Page 98)

Description Item
LDEVs are automatically created in the internal volume when Yes is selected.
If No is selected, you must create LDEV’s manually. Allow Simultaneous Creation of LDEVs
If Yes is specified in “Allow Simultaneous Creation of LDEVs”, the external
volume’s configuration for the LDEVs is used when Yes is selected. If No is
selected, you must configure LDEV’s manually. Use External Storage System
Configuration
External system’s emulation type. All supported emulation types except
OPEN-L can be specified. See
Editing external volume policies (settings)
(page 36) for more information.
Base Emulation Type
Number of LDEVs to be created in the local system when the volume is
mapped. Depends on base emulation type. Number of LDEVs per External Volume
CLPR for accessing the external volume. Cache Partition
See Editing external volume policies (settings) (page 36) for more
information.
Cache Mode •
Enable: Write data from the host is propagated asynchronously
• Disable: Write data from the host is propagated synchronously
See Cache use and external storage performance (page 14) for more
information.
Inflow Control •
Enable: Limits or prevents write data from being written to cache memory
when the write operation cannot be performed.
•
Disable: Allows write data to be written to cache when the write
operation cannot be performed.
See Editing external volume policies (settings) (page 36) for more
information.
Selects I/O load balance system for external storage system. Load Balance Mode
•
Normal Round-robin: Performs load balance in round-robin system.
•
Extended Round-robin: Load balance system is automatically switched
for sequential I/O and random I/O.
• Disable: Performs I/O operation with a single path, without load balance.
The default is Normal Round-robin.
98 External Storage GUI reference