Hitachi Virtual Storage Platform G400, Справочное руководство

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757
Setting this mode to ON or OFF to disable or enable
outputting In-band audit logs.
Mode 757 = ON:
In-band audit log is not output.
Mode 757 = OFF:
In-band audit log is output.
Notes:
(1) Mode 757 applies to the sites where outputting the In-
band audit logs is not needed.
(2) When this option is set to ON,
- There is no access to SM for the In-band audit logs, which
can avoid the corresponding performance degradation.
- SM is not used for the In-band audit logs.
(3) If outputting the In-band audit log is desired, set this
mode to OFF.
OFF
784
This mode can reduce the MIH watch time of RI/O for a TC
Sync or GAD pair internally so that update I/Os can
continue by using an alternate path without time-out
occurrence in the environment where Open host time-out
time is short (15 seconds or less). The mode is effective at
initial pair creation or Resync operation for TC Sync or GAD.
(Not effective by just setting this mode to ON)
The mode is applied to TC Sync (83-01-01-x0/00 and
higher) and GAD (83-01-21-x0/00 and higher).
Mode 784 = ON:
The MIH time of RIO is internally reduced so that, even
though a path failure occurs between DKCs in the
environment where host MIH time is set to 15 seconds,
update I/Os can be processed by using an alternate path
promptly, lowering the possibility of host MIH occurrence.
Mode 784 = OFF:
The operation is processed in accordance with the TC Sync
specification.
Notes:
(1) The mode is applied to the environment where OPEN
host time-out time is set to 15 seconds or less.
(2) The mode is applied to reduce RI/O MIH time to 5
seconds.
(3) This function is available for all the TC Sync and GAD
pairs on the subsystem, unable to specify the pairs that are
using this function or not.
(4) To apply the mode to TC Sync, both MCU and RCU must
be HUS VM and micro-program must be the support version
OFF
System option modes 67
Hitachi Virtual Storage Platform G400, G600 Hardware Reference Guide