HP XP Array Manager Software - Manual (Page 58)

Description Subfield Field
Volume allocations using Fibre Channel prompt for such items
as host group name, host mode, host mode options, and LUN
number.
To display or hide the following fields, click Host Group and
LUN Settings.
(See the following four
fields for details) >> Host Group
and LUN Settings
Specify a host group name for the internal storage system.
Paths are allocated from the external storage system to the
internal storage system.
- Host group name
The host groups to be used during volume allocation or that
were previously set during prior volume allocation.
-
Host Group Set-
tings in Detail
Select one or more host mode options for supporting special
requirements for specific applications.
-
Host Mode Op-
tions
Assign LU numbers to the allocated volumes by entering a
Start from number (or using the default). Set LU numbers in
ascending order and do not use existing numbers.
- LU Number (hex)
Click >> Internal Volume Configuration to display and config-
ure the internal volume options. (See the following four
fields for details)
>> Internal
Volume Configura-
tion
Assign internal volumes to a parity group by entering a Start
from number. For Device Manager, when you specify the first
number (1-16384), the second number is automatically
assigned.
The format for specifying external parity groups is, for
example, "E1" or "E16384".
- Parity Group
From the list, select the cache logical partition resource (CLPR)
value for the internal volumes.
- CLPR
Select Enable to stop write operations to cache and to stop
I/O from the host when the write operations to the external
volume fails.
Select Disable to write I/O from the host during retry
operations to cache memory, even when the writing operation
to the external volume fail. When write operations to the
external volume returns to normal, all the data in cache
memory is written to the external volume.
The default is Disable.
- Inflow control
Select Enable, after receiving the data into the internal storage
system cache memory, the internal storage system signals the
host that an I/O operation has completed and then
asynchronously writes the data in cache memory to the
external storage system.
If you select Disable, the internal storage system signals the
host that an I/O operation has completed only after the local
storage system has synchronously written the data to the
external storage system.
The default is Enable.
- Cache mode
Managing storage resources in a SAN environment 58