Asus PCI-DA2200 User Manual page 151

This function is not supported. The controller is shutdown when the
system is shutdown.
8.7.5 Controller Maintenance
This function is not supported from within the Text RAID Manager.
Controller maintenance functions – such as downloading new
firmware – can be performed from the start-up menu of the Text
RAID Manager.
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ASUS PCI-DA2200 User's Manual