ArrayMasStor K Series
ÒInstallation Instructions and Procedures.Ó
Copyright
Ó
Advanced Technology and Systems Co., Ltd., 11/2001 Rev. A
17
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Removing a Power Supply from the RAID system (with power off)
WARNING
Ð The RAID system must be powered OFF before performing the following procedure.
Redundant Power Supplies
The K-Series RAID system has two independent, redundant power supplies. Each power supply
receives current from the same power cable, and each supply is capable of providing all necessary
power to the array and enclosure. Both power supplies provide power to the system when both are
functioning.
Each power supply provides power to the RAID system simultaneously and each is capable of
supplying the required power to the RAID system - alone if necessary. Note that prolonged single
power supply operation is not recommended (and compromises the high availability intent of the
system). Operating the system with only one power supply should only take place if a power
supply failure occurs. Failed power supplies should be replaced as soon as possible
If a power supply fails, the failure will be detected by the RAID controller, the failure will be
recorded in the Event Log, the Attention LED will light, and the alarm will sound. Each power
supply also has two (2) status lights (LEDs). The LEDs are both green when the power supply is
operating properly and turns amber (or extinguishes completely) if the power supply has failed.
To remove a power supply from the system, push down on the ÒlatchÓ on the top of the power
supply that you wish to extract (see figure 10). Continue pressing down on the ÒlatchÓ while
pulling on the power supplyÕs handle. Then, carefully pull the power supply out of the unit. When
removed from the system, power supplies are susceptible to damage from static electricity.
Extracted power supplies must be placed on, or in, antistatic materials immediately after removal.
Take care not to touch any of the exposed circuitry or connectors on the power supply. Do not
expose extracted power supplies to dust, moisture, or excessive heat.
Before sliding a new power supply into the unoccupied bay, you must suspend data transmissions
from the array host. In general, to do this requires pausing all services, software and I/O operations
that may be accessing the data on the array.
WARNING
Ð If data is still being sent or received when a new power supply is installed in the unit,
it is possible you will encounter data errors.
Once data I/O has been suspended by the host, a new power supply can then be gently slid into the
unoccupied space. We recommend that you keep a spare power supply handy should a replacement
be needed. Spare power supplies can be obtained from the supplier of your K-Series RAID system.
Having two (2) working power supplies in the system maintains the security and High Availability
provided by redundant power supplies.
