HP StorageWorks SAN Director Installation Guide (A7393-90009, May 2007)

Installing FRUs120
Power supply summary
The SAN Director can continue operating during the replacement if at least one power supply
continues operating. A minimum of two power supplies are recommended.
WARNING! When one or more Intelligent blades are present in the chassis, like the HP
StorageWorks B-Series MP Router Blade,
four power supplies are required (two plus two redundant) for
proper operation.
NOTE: You do not need to notify the SAN Director of a hot-swap request for a power supply. The
power supply bays are isolated; power supply filler panels are not required to ensure correct air
flow.
The power supply unit slots are numbered 1 through 4 from bottom to top when facing the port side
of the chassis. The AC power connector on the left provides power to the power supplies in slots 1
and 3; the AC power connector on the right provides power to the power supplies in slots 2 and 4
(see Figure 32 on page 121).
The AC power connectors and the power supply slots are color-coded to identify which AC power
connectors provide power to which power supply slots. Power supply unit labels for slots 1 and 3
and the corresponding AC power connector label are violet, and power supply unit labels for slots
2 and 4 and the corresponding AC power connector label are yellow.
For information about how to check the status of hardware components using Fabric OS commands,
see the HP StorageWorks Fabric OS administrator guide.
CAUTION: To protect against AC failure, HP recommends a minimum of one power supply in slot
1 or 3 and one in slot 2 or 4, for a total of two. Additional power supplies might be required
depending on how many blades are installed.
If only two power supplies are installed and they are both installed in slots corresponding to the
same AC power connector cable, unplugging a single AC power connector cable powers down the
entire chassis.
Disassembling any part of the power supply voids the part warranty and regulatory certifications.
There are no user-serviceable parts inside the power supply.
To protect against AC failure, HP recommends a minimum of one power supply in slot 1 or 3 and
one in slot 2 or 4, for a total of two. Additional power supplies might be required depending on the
type of blades installed.