Hitachi Virtual Storage Platform F400, System Administrator Manual

Page: 288 / 368

Table 60 System option modes for VSP Gx00 models and VSP Fx00 models
Mode Category Description Default MCU/RCU
15 Common This SOM can reduce the host response time to be
within about 6 seconds.
The default setting for this SOM depends on the
microcode level:
■
Default = ON: 83-05-01 and later
■
Default = OFF: 83-04-xx and earlier
Notes:
1. This SOM is used on a storage system where
slow or delayed drive response may affect
business operations.
2. When Dynamic Sparing or Auto Correction
Mode is used, because host I/Os conflict with
copy processing, the I/O watching time is 30
seconds even when this SOM is set to ON.
3. Even though SOM 15 is set to ON, the function
does not apply to SATA or NL-SAS drives.
4. When SOM 771 or SOM 797 is set to ON, the
setting of SOM 771/797 is prioritized for the
read I/O watching time.
5. When this SOM is applied, SOM 142 is disabled.
6. For additional details about this SOM
(interaction with other SOMs, operational
details), contact customer support (see SOM015
sheet).
ON -
System option modes
Appendix B: System option modes
System Administrator Guide for VSP Gx00 models and VSP Fx00 models 288