Pdms - HP StorageWorks 6100 - Enterprise Virtual Array User Manual

5. Mounting hardware
PDU 1
PDU 1 connects to AC power distribution source 1. A PDU 1 failure:
• Disables the power distribution circuit.
• Removes power from PDMs 1, 2, and 3.
• Disables PS 1 in the drive enclosures.
• Disables the upper controller power supply.
PDU 2
PDU 2 connects to AC power distribution source 2. A PDU 2 failure:
• Disables the power distribution circuit.
• Removes power from PDMs 4, 5, and 6.
• Disables PS 2 in the drive enclosures.
• Disables the lower controller power supply.

PDMs

There are six PDMs mounted in the rear of each rack:
• Three mounted on the left vertical rail connect to PDU 1.
• Three mounted on the right vertical rail connect to PDU 2.
Each PDM has eight AC receptacles and one thermal circuit breaker. The PDMs distribute the AC
power from the PDUs to the enclosures. Two power sources exist for each controller pair and drive
enclosure. If a PDU fails, the system will remain operational.
CAUTION:
The AC power distribution within a rack ensures a balanced load to each PDU and reduces the
possibility of an overload condition. Changing the cabling to or from a PDM could cause an overload
condition. HP supports only the AC power distributions defined in this user guide.
HP StorageWorks 4x00/6x00/8x00 Enterprise Virtual Array user guide 95