HP XP Racks - Manual (Page 117)

Description Item
SSD displays when the external volume is the SSD of following storage
systems.
•
HP XP7 Storage
• HUS VM Storage Platform
•
P9500
• XP24000/XP20000 Disk Array
Parity group numbers. Parity Group ID
External volume’s emulation type. Base Emulation Type
External volume’s top LDEV ID. Top LDEV ID
External volume’s top LDEV name. Top LDEV Name
External volume’s number of LDEVs. Number of LDEVs
External volume’s capacity. Capacity
SSIDs. SSID
CLPR used for accessing to the mapped external volume. CLPR
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 42) for more
information.
Displays operation mode of the external path. Path Mode
•
Single: Ordinarily, only one external port is used even if alternate paths
are set, In Single mode, alternate paths are operated only in case of
maintenance work failure.
• Multi: When alternate paths are set, external paths from several ports
are simultaneously used with load balancing.
•
ALUA: When alternate paths are set, external paths from several ports
are simultaneously used with load balancing. External paths connected
to ports in Passive status are not used.
Displays whether ALUA can be set as the Path Mode in the local storage
system. ALUA Permitted
• Enable: ALUA Mode is used.
•
Disable: ALUA Mode is not used.
Displays 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.
External volume’s MP blade IDs. MP Blade ID
Displays the External LDEV Properties window and you can check the
selected external volume's details. LDEV Detail
Add External Volumes wizard 117