Intergraph InterRAID-12, Hardware User'S Manual

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4. Select YES to create the system drive as defined. The system drive information displays
in the Sys Drv column.
Write-through caching reduces the risk of data loss in the event of a power failure.
Write-back caching improves performance, but the drawback is potential data loss if
power fails. If you want to change the policy to write-back for systems with a UPS
attached, refer to the instructions for changing the write policy in this section.
5. To create another system drive on a different pack, or on the unused space of the same
pack, repeat steps 1 through 4 above. If the space is insufficient on a partially defined
pack, a message explaining this condition displays when you try to define a system
drive.
6. After creating all the system drives, press
ESC
twice. When the Save Configuration
window displays, select YES to save the configuration to flash EEPROM.
CAUTION If you select NO in the Save Configuration window, the currently defined configuration is
entirely discarded, and the program returns to the DACCF Main Menu.
NOTE If you press
ESC
in the Save Configuration window, the defined configuration remains intact
and the program returns to the New Configuration menu. You can continue later with the
configuration process.
7. Initialize all of the new system drives. Refer to "05. Initialize System Drive" in this
chapter.
8. Ensure the Array Encl MGMT I/F option is set to Enabled to allow automatic disk drive
rebuild. Refer to “09. Advanced Functions,” in this chapter for more information about
the Array Encl MGMT I/F option and other hardware parameters.
The following instructions allow you to change the write policy for the system drives.
To change the write policy of a system drive:
1. From the System Drive Definition menu, select Toggle Write Policy. The write policy
of the first system drive highlights in the Write Mode column.
2. Press
ENTER
to toggle the policy. For each system drive policy you need to change,
select the policy and press
ENTER
.
3. Once you change the write policy on all the desired system drives, press
ESC
to return to
the System Drive Definition menu.
4. Press
ESC
again to save the configuration.