Mode
Category
Description
Default
MCU/RCU
899
Volume Migration In combination with the SOM 900 setting, whether to
execute and when to start the I/O synchronous copy
change as follows.
Mode 899 = ON:
•
SOM 900 is ON: I/O synchronous copy starts without
retrying Volume Migration.
•
SOM 900 is OFF: I/O synchronous copy starts when the
threshold of Volume Migration retry is exceeded.
(Recommended)
Mode 899 = OFF (default):
•
SOM 900 is ON: I/O synchronous copy starts when the
number of retries reaches half of the threshold of
Volume Migration retry.
•
SOM 900 is OFF: Volume Migration is retired and I/O
synchronous copy is not executed.
Notes:
1.
This mode is applied when improvement of Volume
Migration success rate is desired under the condition
that there are many updates to a migration source
volume of Volume Migration.
2.
During I/O synchronous copy, host I/O performance
degrades.
OFF
900
Volume Migration In combination with SOM899 setting, whether to execute
and when to start the I/O synchronous copy change as
follows.
Mode 900 = ON:
•
SOM899 is ON: I/O synchronous copy starts when the
threshold of Volume Migration retry is exceeded.
•
SOM899 is OFF: I/O synchronous copy starts when the
number of retries reaches half of the threshold of
Volume Migration retry.
Mode 900 = OFF (default):
•
SOM899 is ON: I/O synchronous copy starts when the
threshold of Volume Migration retry is exceeded.
(Recommended)
•
SOM899 is OFF: Volume Migration is retired and I/O
synchronous copy is not executed.
Notes:
1.
This mode is applied when improvement of Volume
Migration success rate is desired under the condition
that there are many updates to a migration source
volume of Volume Migration.
2.
During I/O synchronous copy, host I/O performance
degrades.
OFF
901
Dynamic Tiering
Dynamic Tiering
for Mainframe
By setting the mode to ON or OFF, the page allocation
method of Tier Level ALL when the drive type of tier1 is
SSD changes as follows.
Mode 901 = ON:
For tier1 (drive type is SSD), pages are allocated until the
capacity reaches the limit. Without consideration of
OFF
System option modes
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Hitachi Virtual Storage Platform G1000, G1500, and Virtual Storage Platform F1500 Hardware Guide
Содержание F1500
Страница 12: ...12 Preface Hitachi Virtual Storage Platform G1000 G1500 and Virtual Storage Platform F1500 Hardware Guide ...
Страница 50: ...50 Introduction Hitachi Virtual Storage Platform G1000 G1500 and Virtual Storage Platform F1500 Hardware Guide ...
Страница 106: ...106 Site preparation Hitachi Virtual Storage Platform G1000 G1500 and Virtual Storage Platform F1500 Hardware Guide ...
Страница 120: ...120 Troubleshooting Hitachi Virtual Storage Platform G1000 G1500 and Virtual Storage Platform F1500 Hardware Guide ...
Страница 132: ...132 Specifications Hitachi Virtual Storage Platform G1000 G1500 and Virtual Storage Platform F1500 Hardware Guide ...
Страница 182: ...182 System option modes Hitachi Virtual Storage Platform G1000 G1500 and Virtual Storage Platform F1500 Hardware Guide ...
Страница 204: ...204 Glossary Hitachi Virtual Storage Platform G1000 G1500 and Virtual Storage Platform F1500 Hardware Guide ...
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