Hitachi Virtual Storage Platform F400, System Administrator Manual

Page: 337 / 368

Mode Category Description Default MCU/RCU
1067 Universal
Replicator
This SOM is used to enable microcode downgrade to
a version that does not support URxUR (including
delta).
Mode 1067 = ON: Even when a UR pair has been
registered, downgrading the microcode to a version
that does not support URxUR (including delta) is
allowed.
Mode 1067 = OFF (default): If any UR pair has been
registered, downgrading the microcode to a version
that does not support URxUR (including delta) is not
allowed.
Notes:
1. This SOM is applied to enable microcode
downgrade to a version that does not support
URxUR (including delta) if the configuration
where any UR pair has been registered is not
URxUR (including delta).
2. Setting this SOM to ON allows microcode
downgrade at sites where only 1 mirror is used
in URxUR multi-target configuration without
delta resync and cascade configuration (L or R
site in multi-target, and P or R site in cascade),
but the following phenomena occur after
microcode downgrade. Make sure that the
target storage system does not contain pairs of
URxUR configuration.
Phenomena:
1. When the microcode is downgraded at S
site (local or remote) in multi-target
configuration, the pair between P site and
the target S site cannot be resynchronized.
2. When the pair between I site and R site in
cascade configuration is resynchronized,
the pair status cannot change from COPY
to PAIR.
3. When the microcode is downgraded at R
site in cascade configuration, the pair
between I site and R site cannot be
resynchronized.
OFF Both
System option modes
Appendix B: System option modes
System Administrator Guide for VSP Gx00 models and VSP Fx00 models 337