Power Supply Units; Hot Spare Feature; Removing A Power Supply Unit Blank - Dell EMC PowerEdge R740xd2 Installations- Und Servicehandbuch

Abbildung 117. Installing the internal USB memory key
a. USB memory key
b. USB port
Nächste Schritte
1. If removed, install the low profile expansion card
2. If removed, install the air shroud.
3. Install the system cover.
4. Place the system into the rack. For more information, see the Schieneninstallationshandbuch unter
poweredgemanuals.
5. Open the drive bays, install
6. Install the power supply
7. Follow the procedure listed in
8. While booting, press F2 to enter System Setup and verify that the system detects the USB memory key.

Power supply units

ANMERKUNG: For more information, see the

Hot spare feature

Your System supports the hot spare feature that significantly reduces the power overhead associated with power supply unit (PSU)
redundancy.
When the hot spare feature is enabled, one of the redundant PSUs is switched to the sleep state. The active PSU supports 100 percent of
the load, thus operating at higher efficiency. The PSU in the sleep state monitors output voltage of the active PSU. If the output voltage
of the active PSU drops, the PSU in the sleep state returns to an active output state.
If having both PSUs active is more efficient than having one PSU in the sleep state, the active PSU can also activate the sleeping PSU.
The default PSU settings are as follows:
• If the load on the active PSU is more than 50 percent, then the redundant PSU is switched to the active state.
• If the load on the active PSU falls below 20 percent, then the redundant PSU is switched to the sleep state.
You can configure the hot spare feature by using the iDRAC settings. For more information about iDRAC settings, see the Integrated Dell
Remote Access Controller User's Guide available at www.dell.com/idracmanuals.

Removing a power supply unit blank

Voraussetzungen
Follow the safety guidelines listed in
134 Installing and removing system components
riser.
all drives, and then close the drive bays.
units.
After working inside your
Safety instructions.
system.
PSU specifications section.
www.dell.com/