Hitachi F1500, Руководство по оборудованию

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Mode Category Description Default MCU/RCU
processing for mainframe control information only
will be performed after the write skip.
2. It provides support for Mainframe Control Block
Write.
The high speed LDEV format for external volumes is
supported. Control Block Write of the external LDEVs
in mainframe emulation is supported by Device
Manager - Storage Navigator (GUI).
Notes:
1. If the LDEV is not written with data “0” before
performing the function, the LDEV format may fail.
2. After the format processing, make sure to set system
option mode 457 to OFF.
459 ShadowImage
for Mainframe,
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:
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.
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 -
466 Universal
Replicator,
Universal
Replicator for
Mainframe For UR/URz operations it is strongly recommended that the
path between main and remote storage systems have a
minimum data transfer speed of 100 Mbps. If the data
transfer speed falls to 10 Mbps or lower, UR operations
cannot be properly processed. As a result, many retries
occur and UR pairs may be suspended. Mode 466 is
provided to ensure proper system operation for data
transfer speeds of at least 10 Mbps.
Mode 466 = ON:
Data transfer speeds of 10 Mbps and higher are supported.
The JNL read is performed with 4-multiplexed read size of
256 KB.
Mode 466 = OFF:
For conventional operations. Data transfer speeds of 100
Mbps and higher are supported. The JNL read is performed
with 32-multiplexed read size of 1 MB by default.
Note:
The data transfer speed can be changed using the Change
JNL Group options.
OFF
467 ShadowImage,
ShadowImage
for
Mainframe,Comp For the following features, the current copy processing
slows down when the percentage of “dirty” data is 60% or
higher, and it stops when the percentage is 75% or higher.
Mode 467 is provided to prevent the percentage from ON
142 System option modes
Hitachi Virtual Storage Platform G1000, G1500, and Virtual Storage Platform F1500 Hardware Guide