NEC N8403-019, User Manual

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3. Maintenance
The disk array controller supports the following maintenance features:
 Configuration on Disk (COD)
 Rebuild
 Critical boot
3-1 Configuration on Disk (COD) Feature
The COD feature writes the configuration information on a HDD. The feature prevents the configuration
information from being lost if the disk array controller is defected and replaced. After the disk array controller
is replaced, the COD feature can read the configuration information from the HDD to operate the controller
normally.
Check
The disk array controller does not save the configuration information itself.
Instead, it writes and saves the configuration information on the HDD.
3-2 Rebuild Feature
When a HDD fails, the rebuild feature recovers the data on the failed HDD. The feature is available for
redundant logical drives in RAID1.
See "Chapter 3 Features of Disk Array Controller" for details.