c. Reinstall the screw with lock washer to secure the lug connector in place, applying a torque between 1.7 N-m (15
in-lb) and 2.3 N-m (20 in-lb).
7. To complete the DC connection, secure the other end of each cable wire component of the DC power cable to the
target DC power source.
Check the three individual DC cable wire colors before connecting each cable wire lug to its proper location on the
DC power source. The black cable attaches to the positive connection. The red cable attaches to the negative
connection. The green cable attaches to the ground connection.
8. Repeat steps 3–7 for the redundant DC
PCM installed in the enclosure.
9. Repeat the procedure for the remaining DC enclosures in the array.
CAUTION Connecting to a DC power source outside the designated -48V DC nominal range (-35V DC to -72V DC)
may damage the enclosure.
Power cycle AC or DC enclosures
Access the enclosure rear panel when powering on or powering off.
To power on the system:
1. Power up drive enclosure(s): Press the power switches on the back of each drive enclosure to the On position. Allow
two minutes for the disks to spin up.
2. Power up the controller enclosure: Press the power switches on the back of the controller enclosure to the On position.
Allow several seconds for the disks to spin up.
3. Check management interfaces or enclosure front and rear panel LEDs for fault conditions. See also
To power off the system:
1. Stop all I/O from hosts to the system.
2. Shut down both controllers using one of the methods described below:
l
Use the SMU to shut down both controllers, as described in the online help and the Storage Management Guide.
l
Use the CLI to shut down both controllers, as described in the CLI Reference Guide.
3. Press the power switch on each controller enclosure PCM to the Off position.
4. Press the power switch on each disk enclosure PCM to the Off position.
26
Chapter 3
Installing the enclosures