Drive Column Power; Drive Column-Single Power Cable; Drive Column-Two Power Cables; Drive Column Power Connections - StorageTek L180 Installation Manual

Drive Column Power

There are two drive-column power-cable configurations for the library:
• Single power cable
• Two power cables
To determine the type is present in a library, check the cables behind the PDU;
single-power-cable models will have only one cable, and two-power-cable
models will have connectors marked PWR1 and PWR2.
Drive Column—Single Power Cable
If the library's drive column has only one power cable, then all of the drives
will be on a single circuit.
If you install an optional power system in this type of library, the optional PDU
will supply redundant power to the library robotics only.
Drive Column—Two Power Cables
Newer machines incorporate two power cables into the drive column. This
enables more power configurations for the customer.
You can configure these newer models so that half of the drives are connected
to one PDU, and the other half are connected to the other PDU.
Note: When installing drives in a library that has two PDUs and a two-power-

Drive Column Power Connections

If the library has one power cable running from the drive column, the plug for
the column is connected at the rear of the standard PDU.
If there are two power cables running from the drive column, the plug labeled
PWR1 denotes the lower half of the drive column; PWR2 denotes the upper half
of the column. You may cross-couple the power plugs at the rear of the PDUs.
Note: StorageTek advises you to label which drives are connected to each
95896
cable drive column, attach each PDU to a separate branch circuit.
PDU.
Eleventh Edition
StorageTek Proprietary
Drive Column Power
4-3