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There are two LEDs on each hard disk drive:
Green Flashing when an operation, such as a read or a write, is being performed.
Amber
8
BladeCenter S Type 7779/8886: Installation and User's Guide
Flashing when the hard disk drive is being rebuilt (fast blink) or identified
(slow blink).
Note: When power is restored to the BladeCenter S chassis after a
complete loss of power and you have implemented the hard disk drives as
a mirrored array, the fault light will blink as the hard disk drive is being
resynchronized.
This resynchronization occurs because the blade servers are attempting to
power on before all of the storage modules and SAS connectivity modules
are powered up and available. The mirrored array is accessible during
resynchronization although performance may be slightly slower.
Solid when there is a drive failure.
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