Hardware And Software Failures; Interraid-8 Power Supply Failures; Disk Drive Rebuild And Disk Drive Failure - Intergraph InterRAID-12 Hardware User's Manual

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Hardware and Software Failures

This section contains some miscellaneous InterRAID cabinet and system related failures
encountered and solved by Intergraph.

InterRAID-8 Power Supply Failures

The following power supply failures apply only to the InterRAID-8 disk arrays. The
messages display on the Information Control Panel.
Failure
Too Many Power Supplies for
the Current Load <or> Excess
Power Supply
Insufficient Power for Installed
Drives
Power Supplies are Non-
redundant <or> Non-redundant
Power
NOTE Power supplies lose their redundancy, or fault tolerance, when using two power supplies with
too many disk drives. The cabinet shuts down if one of the power supplies fails.
InterRAID-8 disk arrays operate with a minimum configuration of two power supplies and
three disk drives to maintain redundancy. If you must run the disk array with two power
supplies, do not use more than three disk drives. If configured with more than three disk
drives, you must run the disk array with all three power supplies for redundancy.

Disk Drive Rebuild and Disk Drive Failure

InterRAID disk arrays should indicate certain operating conditions as follows:
u
A disk drive rebuild in progress -- the disk drive's LED and the Channel Mode LED
should change to steady amber.
u
A disk drive failure -- the disk drive's LED and the Channel Mode LED should change
to blinking amber.
Description
Not enough disk drives installed for the existing number
of power supplies. Install more disk drives or remove a
power supply. After removing a power supply, be sure to
install the blanking plate included in the accessory pack.
Not enough power supplies installed for the existing
number of disk drives. Install a power supply or remove
disk drives.
The power supplies cannot maintain redundancy with the
present disk drive load. Install a power supply or remove
disk drives. The system is operational in this condition,
but the cabinet will shut down if a power supply fails.