Mode Category Description Default MCU/RCU
2. When a pool is newly installed, the load may be
concentrated on the installed pool volumes.
3. When 0 data discarding is executed, load may be
unbalanced among pool volumes.
4. Pool VOL deletion while this SOM is set to ON fails. To
delete pool VOLs, set this SOM to OFF.
757 Common Enables/disables output of in-band audit logs.
Mode 757 = ON: Output is disabled.
Mode 757 = OFF (default): Output is enabled.
Notes:
1. Mode 757 applies to the sites where outputting the In-
band audit logs is not needed.
2. When this SOM 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
SOM to OFF.
OFF -
784 TrueCopy
Global-active
device
This SOM can reduce the MIH watch time of RI/O for a TC or
GAD pair internally so that update I/Os can continue by using
an alternate path without MIH or time-out occurrence in the
environment where Mainframe host MIH is set to 15 seconds,
or Open host time-out time is short (15 seconds or less). This
SOM is effective at initial pair creation or Resync operation
for TC or GAD. (Not effective by just setting this SOM to ON.)
This SOM is applied to TC and GAD. This SOM supports Fibre
remote copy paths but not iSCSI.
Mode 784 = ON: The MIH time of RIO is internally reduced
so that, even though a path failure occurs between storage
systems 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 (default): The operation is processed in
accordance with the TC or GAD specification.
Notes:
1. This SOM is applied to the environment where
Mainframe host MIH time is set to 15 seconds.
2. This SOM is applied to the environment where OPEN
host time-out time is set to 15 seconds or less.
3. This SOM is applied to reduce RI/O MIH time to 5
seconds.
4. This function is available for all the TC and GAD pairs on
the storage system, unable to specify the pairs that are
using this function or not.
5. For a TC or GAD pair with this SOM effective (RI/O MIH
time is 5 seconds), the setting of RI/O MIH time made
at RCU registration (default is 15 seconds, which can be
changed within range from 10 to 100 seconds) is
invalid. However, RI/O MIH time displayed on Device
OFF
Both
System option modes 367
System Administrator Guide for VSP Gx00 models and VSP Fx00 models
To Next Page
Loading...
