Owners Manual

Installing the optical drive
Prerequisites
Follow the safety guidelines listed in Safety instructions.
Steps
1. Align the optical drive with the optical drive slot on the front of the system.
2. Slide in the optical drive until the release tab snaps into place.
Figure 70. Installing the optical drive
Next steps
1. Connect the power and data cables to the connector on the optical drive and the connector on the system board.
NOTE: Route the cable properly on the side of the system to prevent it from being pinched or crimped.
2. Follow the procedures in After working inside your system.
Power supply units
The power supply unit (PSU) is an internal hardware component which supplies power to the components in the system.
This system supports two 750 W AC PSUs.
CAUTION:
If two PSUs are installed, both the PSUs must have the same type of label. For example, Extended
Power Performance (EPP) label. Mixing PSUs from previous generations of storage systems are not supported,
even if the PSUs have the same power rating. Mixing PSUs will result in mismatch condition or failure to turn
the system on.
NOTE: When two identical PSUs are installed, power supply redundancy (1+1 – with redundancy or 2+0 – without
redundancy) is configured in system BIOS. In redundant mode, power is supplied to the system equally from both PSUs
when Hot Spare is disabled. When Hot Spare is enabled, one of the PSUs is put into the sleep mode when system utilization
is low in order to maximize efficiency.
NOTE: If two PSUs are used, they must be of the same maximum output power.
Hot spare feature
Your system supports the hot spare feature that significantly reduces the power overhead associated with power supply unit
(PSU) redundancy.
104
Installing and removing system components