Mode
Category
Description
Default
MCU/RCU
Mode 769 = OFF (default):
The retry operation is enabled when the path creation
operation is executed (retry operation is executed).
Notes:
1.
This mode is applied when the three conditions below
are met:
•
SOM 114 is set to OFF (operation of automatically
switching the port is disabled).
•
HMO 49 and HMO 50 are set to OFF
(70-02-31-00/00 and higher).
•
TPC-R is used (it is not applied in normal
operation).
2.
When SOM 769 is set to ON, SOM 114, HMO 49 and
HMO 50 must not be set to ON.
3.
In either of the following cases, the path creating
operation may fail after automatic port switching is
executed.
•
SOM 114 is set to ON.
•
HMO 49 and HMO 50 are set to ON.
776
TrueCopy for
Mainframe,
Business
Continuity
Manager
This mode enables/disables to output the F/M=FB message
to the host when the status of P-VOL changes to Suspend
during a TC/TCA S-VOL pair suspend or deletion operation
from BCM.
Mode 776 = ON:
When the status of P-VOL changes to Suspend during a
TC/TCA S-VOL pair suspend or deletion operation from
BCM, the F/M=FB message is not output to the host.
Mode 776 = OFF (default):
When the status of P-VOL changes to Suspend during a
TC/TCA S-VOL pair suspend or deletion operation from
BCM, the F/M=FB message is output to the host.
Notes:
1.
Set this mode to ON in the environment where
TC/TCA for z/OS is used from BCM and the MCU host
does not need the F/M=FB message output during an
S-VOL pair suspend or deletion operation from BCM.
2.
If this mode is set to ON, the F/M=FB message is not
output to the host when the status of P-VOL changes
to Suspend during a TC/TCA S-VOL pair suspend or
deletion operation from BCM
3.
If the PPRC item of CU option is set to NO, the F/
M=FB message is not output to the host regardless of
setting of this mode.
4.
If the function switch#07 is set to “enable”, the F/
M=FB message is not output to the host regardless of
setting of this mode.
OFF
784
TrueCopy
global-active
device’
This mode can reduce the MIH watch time of RI/O for a
TrueCopy for Mainframe or global-active device 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
OFF
MCU/RCU
158
System option modes
Hitachi Virtual Storage Platform G1000, G1500, and Virtual Storage Platform F1500 Hardware Guide