Maintenance; Configuration On Disk (Cod) Feature; Rebuild Feature; Critical Boot Feature - NEC Promise SuperTrak EX8350 User Manual

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3. Maintenance

The disk array controller supports the following maintenance features:

Configuration on Disk (COD) feature

Rebuild feature

Critical boot feature

3-1. Configuration on Disk (COD) Feature
The COD feature records the configuration information in HDDs. 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 reads the configuration information from HDDs to operate the controller
normally.
The disk array controller does not store the configuration information within
it. Instead, it records and stores the configuration information in HDDs.
Check
3-2. Rebuild Feature
When a HDD is defected, the rebuild feature recovers the data in the defected HDD. The feature is available
for redundant logical drives in the RAID1, RAID5, or RAID10 level.
See "Chapter 3 Features of Disk Array Controller" for details.
3-3. Critical Boot Feature
The disk array controller supports the critical boot feature. If an error occurs in the HDD configuring the
system drive during the boot of the server and the system drive does not respond normally, the critical boot
feature automatically excludes the defected HDD and boots the server.