Hitachi Virtual Storage Platform G400, Reference Manual

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System Option Modes
System Option Modes allow VSP Gx00 models to be configured to specific
customer operating requirements.
At installation, the modes are set to their default values, as shown in the
following table. If you think these mode settings should be changed, discuss
these settings with your Hitachi Data Systems team. The System Option
Modes can be changed by a Hitachi Data Systems representative only.
The following table was up to date at the time this manual was published.
However, the System Option Mode information might change in firmware
releases that precede the next release of this manual. Contact your Hitachi
Data Systems team for the latest information about System Option Modes.
The System Option Mode information includes:
• Mode = specifies the System Option Mode number
• Description = describes the action or function that the mode provides.
• Default = specifies the default setting (ON or OFF) of the mode.
Note: These modes are supported by all firmware versions.
Mode Description Default
15
The mode can improve the host response time to be about
within 6 seconds.
Note:
1. The mode applies when a drive response delay may
affect business operations.
2. If Dynamic Sparing or Auto Correction Mode is used due
to host I/O conflicts with copy processing, I/O watching
time is 30 seconds even the mode is set to ON.
3. Even though System Option Mode 015 is set to ON, the
function does not apply to SATA or NL-SAS drives.
ON
22
Regarding the correction copy or the drive copy, in case
ECCs/LRC PINs are set on the track of copy source HDD,
mode 22 can be used to interrupt the copy processing
(default) or to create ECCs/LRC PINs on the track of copy
target HDD to continue the processing.
Mode 22 = ON:
If ECCs/LRC PINs (up to 16*1) have been set on the track
of copy source HDD, ECCs/LRC PINs (up to 16*1) will be
created on the track of copy target HDD so that the copy
processing will continue.
OFF
50 System option modes
Hitachi Virtual Storage Platform G400, G600 Hardware Reference Guide