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4.
2.5. Hot-plug Drive Replacement
The RAID controller supports the ability of performing a hot-swap drive replacement without powering down the
system. A disk can be disconnected, removed, or replaced with a different disk without taking the system off-line.
The RAID rebuilding will be processed automatically in the background. When a disk is hot swap, the RAID controller
may no longer be fault tolerant. Fault tolerance will be lost until the hot swap drive is subsequently replaced and the
rebuild operation is completed.
2.5.1. Recognizing a Drive Failure
A drive failure can be identified in one of the following ways:
An error status message lists failed drives in the event log.
•
A fault LED illuminates on the front of RAID subsystem if failed drives are inside (Available only
•
on SAS expander model).
2.5.2. Replacing a Failed Drive
With RAID subsystem drive tray, you can replace a defective physical drive while your computer is still
operating. When a new drive has been installed, data reconstruction will be automatically started to
rebuild the contents of the disk drive. The controller always uses the smallest hotspare that "fits". If a
hotspare is used and the defective drive is exchanged on-line, the new inserted HDD will automatically
assign as a hotspare HDD.
Note: The capacity of the replacement drives must be at least as large as the capacity of the other drives
in the RAID set. Drives of insufficient capacity will be failed immediately by the controller without
starting the "Automatic Data Rebuild".
2.6. Summary of the installation
The flow chart below describes the installation procedures for 12Gb/s SAS RAID controllers. These procedures
include hardware installation, the creation and configuration of a RAID volume through the McBIOS/McRAID
manager, OS installation and installation of 12Gb/s SAS RAID controller software.
Follow the on-screen prompts to complete Volume Upgrade and Clean Install of OS X
Mavericks. Power up the Intel-based Mac and volume will be added in the
bootable device automatically.
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