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Mode
908
Category
Universal
Replicator
Description
The mode can change CM capacity allocated to MPBs with
different workload.
Mode 908 = ON:
The difference in CM allocation capacity among MPBs
with different workload is large.
Mode 908 = OFF (default):
Difference in CM allocation capacity among MPBs with
different workload is small. (Existing operation)
Note:
1. If a CLPR is used by only some MPBs among all the
installed MPBs, set the mode to ON for the CLPR to
increase CM capacity allocated to the MPBs that use the
CLPR.
Example:
(a) A CLPR only for UR JNLG
(b) A configuration where MPBs and CLPRs are
separately used for open systems.
2, Since CM capacity allocated to MPBs with low load is
small, the performance is affected by a sudden increase
in load
3. This mode is effective for a CLPR. Therefore, when
setting the mode to ON/OFF, select target "LPRXX
(XX=00 to 31)". For example, even when CLPR0 is
defined (any of CLPR1 to 31 are not defined), select
“LPR00” first and then set the mode to ON/OFF.
4. SOM908 cannot be used with SOM 933. When SOM
933 is set to ON, the function of SOM908 is canceled
even though SOM908 is ON.
B–26
System option modes
Hitachi Unified Storage VM Block Module Hardware User Guide
MCU/
RCU
Default
OFF
.