Hitachi VSP G200 System Administration Manual page 376

Mode Category
972 Common
973 Common
1015 Universal
Replicator
376
System Administrator Guide for VSP Gx00 models and VSP Fx00 models
Description
8. Before downgrading the micro-program to an
unsupported version, set SOM 937 to OFF and wait for
at least 30 minutes.
By setting this SOM, THP Page Size in Inquiry Page E3h is
changed. THP Page Size varies depending on the combination
of SOM 972 and 973 settings. For details, contact customer
support (see SOM972_973 sheet).
Notes:
1. This SOM is applied when a delay in host I/O response
due to reclamation processing occurs in a customer
environment.
2. Reclamation processing is delayed.
3. This SOM is to prioritize host I/O response over
reclamation processing in VxVM environment, so that
the time required for reclamation processing may
increase when this SOM is set to ON.
For details about the interaction between this SOM and SOM
1069, contact customer support (see SOM1069 sheet).
By setting this SOM, THP Page Size in Inquiry Page E3h is
changed. THP Page Size varies depending on the combination
of SOM972 and 973 settings. For details, contact customer
support (see SOM972_973 sheet).
Notes:
1. This SOM is applied when a delay in host I/O response
due to reclamation processing occurs in a customer
environment.
2. When this SOM is set to ON, reclamation processing is
delayed.
3. This SOM is to prioritize host I/O response over
reclamation processing in VxVM environment, so that
the time required for reclamation processing may
increase when this SOM is set to ON.
For details about the interaction between this SOM and SOM
1069, contact customer support (see SOM1069 sheet).
When a delta resync is performed in a 3DC multi-target
configuration with TC and UR, this SOM is used to change the
pair status to PAIR/Duplex directly and then complete the
delta resync. If the delta resync fails and all differential data
items are copied, the pair status changes to COPY/Pending
regardless of the SOM 1015 setting, and then it changes to
PAIR/Duplex.
When the existing delta resync function is required (pair
status changes to COPY/Pending and then to PAIR/Duplex),
set this SOM to ON before performing delta resync. If SOM
1015 is set (ON or OFF) while delta resync is being peformed,
the setting is not applied.
Mode 1015 = ON: The pair status changes to COPY/Pending
and then to PAIR/Duplex when a delta resync is performed in
a 3DC multi-target configuration.
System option modes
Default MCU/RCU
OFF -
OFF -
OFF MCU