Ac Power Supply - HP MSA 2050 User Manual

AC power supply

Enclosures equipped with switchless power supplies rely on the power cord for power cycling. Connecting the cord from
the power supply power cord connector to the appropriate power source facilitates power on, whereas disconnecting the
cord from the power source facilitates power off.
Figure 12 AC power supply
AC power cycle
To power on the system:
1. Obtain a suitable AC power cord for each AC power supply that will connect to a power source.
2. Plug the power cord into the power cord connector on the back of the drive enclosure (see
end of the power cord into the rack power source. Wait several seconds to allow the disks to spin up.
Repeat this sequence for each power supply within each drive enclosure.
3. Plug the power cord into the power cord connector on the back of the controller enclosure (see
other end of the power cord into the rack power source.
Repeat the sequence for the controller enclosure's other switchless power supply.
To power off the system:
1. Stop all I/O from hosts to the system [see
2. Shut down both controllers using either method described below:
Use the SMU to shut down both controllers, as described in the online help and web-posted HPE MSA 2050 SMU

Reference Guide.
Proceed to
Use the CLI to shut down both controllers, as described in the HPE MSA 2050 CLI Reference Guide.

3. Disconnect the power cord female plug from the power cord connector on the power supply module.
Perform this step for each power supply module (controller enclosure first, followed by drive enclosures).
NOTE: Power cycling for enclosures equipped with a power switch is described below.
"Stopping I/O" (page
step 3.
Power cord connect
46)].
Powering on/powering off
Figure 12). Plug the other
Figure 12). Plug the
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