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Chapter 11 System Management
11.2 Functions in the Action Area for System
ETERNUS Web GUI User’s Guide
Copyright 2013 FUJITSU LIMITED P2X0-1090-10ENZ0
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• Checkcode Enforcement
Select whether to enable or disable the Checkcode Enforcement mode.
- Enable
Error detection function in the ETERNUS DX Disk storage system is enhanced.
When data is duplicated, the check codes of all the data blocks are checked.
- Disable
Error detection in the ETERNUS DX Disk storage system is performed with the normal procedure.
• I/O Offloading
Select whether to enable or disable I/O offloading.
- Enable
Performs some of the I/O processes in ROE to reduce the CPU usage ratio and improve the maxi-
mum performance.
- Disable
Performs only the encryption processes and parity creation for RAID5 or RAID6 in ROE, which is
the conventional method.
● Web GUI Settings
• Function to Add Host
Select which function for adding hosts is to be used.
- Use "Add Host Group"
Create a host group and register the hosts as members. When the "Use "Add Host Group"" check-
box is selected, the actions for creating host groups are displayed.
- Use "Add Host"
Register hosts without creating host groups. When the "Use "Add Host"" checkbox is selected, the
actions for adding hosts are displayed.
If "Enable" is selected, write access performance is reduced.
• When the existing controller firmware is updated to version V10L50 by using the [Apply
Controller Firmware] function, "Disable" is selected for this item. For newly purchased ETERNUS
DX Disk storage systems, "Enable" is selected for this item. Note that the [Apply Controller Firm-
ware] function can be performed by a maintenance engineer who has the "Maintenance Oper-
ation" policy.
• Rebooting the ETERNUS DX Disk storage system is required to enable the new configuration.
The current I/O offloading setting and the I/O offloading setting after rebooting can be
checked. Refer to "11.1.12 System Settings" (page 731)
for details.
• Performance may not be improved even when this item is enabled if the existing ROE busy
ratio is high. Refer to "10.1.2.2 Controller Module (Performance)" (page 633)
for ROE busy
ratio.
• This item is available only for ETERNUS DX8700 S2.
Selecting either "Use "Add Host Group"" or "Use "Add Host"" is recommended. If both of these
checkboxes are not selected, the [Set] button cannot be clicked.