Mode Category Description Default MCU/RCU
desired in UVM connection using an ECM storage
system as an external storage system.
2. When this SOM is set to ON and the connected external
storage system is not in stable status (such as failure
and recovery from failure), a blockage due to Not Ready
status and auto-recovery might occur repeatedly.
1043 Universal
Replicator
This SOM disables journal copy.
Mode 1043 = ON: When the following conditions are met at
the UR secondary site, the journal copy is disabled.
For versions earlier than 80-02-05-00/00 and for VSP Gx00
models and VSP Fx00 models, the following conditions (1)
and (2) or (1) and (3) are met:
1. 4,096 or more journals are accumulated at the
secondary site.
2. The CLPR write pending rate for journal volumes of MP
blade/unit for which journal ownership at the RCU is
defined is 25% or higher (including the write pending
rate for other than journal volumes).
3. The initiator operating rate of the MP blade/unit for
which journal ownership at the RCU is defined is 40%
or higher.
For versions 80-02-05-00/00 and later, the following
conditions (1) and (2) or (1) and (3) are met:
1. 4,096 or more journals are accumulated at the
secondary site.
2. The CLPR write pending rate for journal volumes of MP
blade/unit for which journal ownership at the RCU is
defined is 25% or higher (including the write pending
rate for other than journal volumes).
3. It takes 15 seconds or longer to start restore after
journal copy at the RCU.
Note: Even though the above conditions are met, journal
copy is not disabled when all time stamps of the journals
accumulated are the same in a consistency group containing
multiple journals.
Mode 1043 = OFF (default): The journal copy is not
disabled.
Notes:
1. This SOM applies when one of the following conditions
is met:
(a) Multiple journals are registered in a consistency
group of CCI.
(b) Multiple journals are registered in an extended
consistency group.
(c) Journals are accumulated at the secondary site,
causing the system performance to decrease.
2. If SOM 690 is set to ON and the Write Pending rate is
60% or higher, the journal copy is disabled regardless
of the setting of this SOM.
3. When the host write speed is faster than the JNL copy
speed, the usage rate of the master journal increases.
OFF
Both
378 System option modes
System Administrator Guide for VSP Gx00 models and VSP Fx00 models
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