
Section 2: Hardware
TVC-1211 User Manual
2-7
020-100769-01 Rev. 4 (05-2012)
2.5
Redundant Array of Independent Disks (RAID)
2.5.1 Configurations
RAID combines physical hard disks into a single logical unit. The TVC-1211 utilizes a hardware RAID
solution and comes pre-configured in RAID 1+0 configuration.
Recognizing Hard Drive Failures
A steadily glowing Fault LED indicates a drive failure. Ensure you have a current backup and replace the
failed drive as soon as possible. For details, refer to
3.9.2 Monitoring Hard Disk Drives, on page 3-12
.
Effects of Hard Drive Failures
If more hard drives fail than the fault tolerance method allows, the logical drive fails. In this case, you are
likely to lose data.
2.6
Disk Replacement - Automatic Rebuild
When replacing a failed drive in a RAID configuration, the system automatically starts data recovery. When
the failed drive is replaced while the system is powered ON, all disk activity pauses while the drive spins up.
Once the drive has reached operating speed data recovery begins.
If you replace a drive when the system is powered OFF, a POST message will appear when the system is
powered ON. The message will prompt you to press the F1 key to start data recovery. If you do not press the F1
key the system will remain in a ready-to-recover mode and the POST message will appear each time the
system is started.
Failure of another drive in the array during the rebuild will result in a loss of data. Do not remove a second
drive from an array until the first failed or missing drive has been replaced and the rebuild process is complete.
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