HP Surestore Disk Array 12h - And FC60 Service Manual page 248

Appendix D. Back-to-Back Racking
Installation Procedure
7. Install Replacement PDUs
a) Attach two PDUs vertically to the brackets installed in the previous step. Position the PDU with
its large power receptacle toward the bottom and install as described in the A4915A Power
Upgrade Kit Quick Installation Guide.
b) Install the horizontal PDU with the large power receptacle to the right (facing the rear of the rack).
Install the PDU in the holes indicated below, for the specific cabinet, as described in the power
upgrade kit quick installation guide:
Rack
1.6 Meter Rack -
2-meter Rack -
8. Install the power cables
Connect each power cable from an array power supply (P1, P2, and P3) to a different PDU (PDU #1,
PDU#2, and PDU #3) as shown in
To help ensure that individual array supplies get power from a different PDU, divide the cabinet
into vertical thirds, looking from the back. All power supplies on the right side go to PDU#1
mounted on the upper right side; all power supplies in the middle of the arrays go to PDU #2 the
horizontal PDU; and, all power supplies to the left go to PDU #3 on the upper left side.
Figure 52 illustrates the cabling for a 2-meter rack with 6 units. However, this diagram applies to any
configuration, a 2-meter with 5 units or 1.6 meter with 3 or 4 units. Simply follow the cabling for the
number of arrays you have installed.
Route the cables from the back of the disk array, out and around the outside of the rack column, and into
the PDU as shown in Figure
248
EIA Holes (as counted from the bottom of the rack
89 (middle hole of EIA unit 30)
41 (middle hole of EIA unit 14)
Figure 52 Power Cable Schematic.
53. Do not connect more than 8 power cables into one PDU.