Dell PowerVault ML6000 - Manual (Page 25)

Chapter 3 Description
Back Panel Components
Dell PowerVault ML6000 User’s Guide 25
Rear Power Switches 3
Rear power switches are located on each power supply. Turning off the
rear power switch on a power supply removes all power from the library.
The rear power switches should be used in all emergency and service
situations.
Power System 3
The library supports single and redundant power configurations. The
single power configuration has a single AC line input and single DC
power supply. The redundant configuration has dual AC line input and
dual DC power supplies.
If you have redundant power supplies, you can “hot swap” a power
supply (power to the library remains on while you exchange the
hardware), and you can “hot add” power supplies to other modules
(power to the library remains on while you are adding the hardware).
Warning:
Turn off the rear power switch whenever you are servicing
the library. In the event of danger to personnel or
property, immediately turn off the rear power switch and
remove all power cords.
Caution:
Except in emergencies, use the shutdown procedure
before switching off the rear power switch. See Shutting
Down, Powering Off, and Completely Removing Power
on page 162 for instructions on how to shut down the
library.
Caution:
At least one power supply must be plugged in at all times.
Warning: The power outlet must be available near the library and
must be easily accessible.
Caution:
The 9U Library Control Module and each 9U Library
Expansion Module that contains drives must have at least
one power supply for every four drives. You can add a
redundant power supply to each module. Installing one
power supply in one module and another power supply in
another module does not provide redundant power; the
two power supplies must reside in the same module.