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3-12 Functional and Operational Characteristics
Hitachi Universal Storage Platform V/VM User and Reference Guide
Mode Category Function Default MCU/RCU
346 Open
If an HBA containing HP WWN being connected, the LUN
Security function is operational by setting system option mode
346.
Mode 346 = ON: LUN Security is operational without host mode
setting restriction.
Mode 346 = OFF: LUN Security is operational only when host
mode 03 is set to ON.
Note: For a new storage system, system option mode 346 ON
can be set as the default setting.
Caution: For a storage system in use, you must shut down the
server in order to set mode 346 ON in this HBA configuration:
1. Shut down the server.
2. Set mode 346 to ON.
3. Power on the server.
4. Check whether any problems exist.
OFF –
448
Universal
Replicator
Universal
Replicator for z/OS
Mode 448 = ON: (Enabled) If the SVP detects a blocked path,
the SVP assumes that an error occurred and immediately splits
(suspends) the mirror.
Mode 448 = OFF: (Disabled) If the SVP detects a blocked path
and the path does not recover within the specified period of
time, the SVP assumes that an error occurred and splits
(suspends) the mirror.
Note: The mode 448 setting takes effect only when mode 449
is set to OFF.
OFF –
449
Universal
Replicator
Universal
Replicator for z/OS
Detecting and monitoring path blockade between MCU and RCU
of UR/URz.
Mode 449 = ON: Detecting and monitoring of path blockade will
NOT be performed.
Mode 449 = OFF: Detecting and monitoring of the path
blockade will be performed.
OFF –
454
Virtual Partition
Manager
When making a destage schedule for CLPRs, using the average
workload of all the CLPRs or the highest workload of those of
the CLPRs can be optional.
Mode 454 = ON: The average workload of all the CLPRs is used
to make the destage schedule.
Mode 454 = OFF: The highest workload of those of the CLPRs is
used to make the destage schedule.
Note: The priority of the destage processing for a specific CLPR
in the overloaded status decreases and the overloaded status is
not released so that TOV (MIH) may occur.
OFF –
459
ShadowImage for
z/OS
ShadowImage
When the secondary volume of an SI/SIz pair is an external
volume, the transaction to change the status from SP-PEND to
SPLIT is as follows:
(1) Mode 459 = ON when creating an SI/SIz pair: The copy
data is created in cache memory. When the write processing on
the external storage completes and the data is fixed, the pair
status will change to SPLIT.
(2) Mode 459 = OFF when creating an SI/SIz pair Once the
copy data has been created in cache memory, the pair status
will change to SPLIT. The external storage data is not fixed
(current spec).
OFF –