Lenovo D1212, Hardware Installation And Maintenance Manual

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Chapter 4. Operation
This chapter contains the following items:
• “Power On” on page 51
• “Unit Identification Number” on page 51
• “Power Down” on page 52
Note: Before you power up the enclosure make sure that all the modules are firmly seated in their correct
bays.
Power On
CAUTION:
Do not operate the enclosure system until the ambient temperature is within the specified operating
range (see “Environment” on page 113). If the drives have been recently installed, make sure that they
have had time to adjust to the environmental conditions before they operate.
1. Power on the system by connecting the power cables to the PCM or to the PSU switch to the "on"
position for 5U enclosure.
2. The system power LED on the Ops panel should be lit green when the enclosure power is activated (and
the disk drive motors should start).
Important: If mains power is lost for any reason, on restoration of power the system re-starts automatically.
Notes:
• For details of the Ops panel LEDs for 2U enclosures and related fault conditions, refer to “Operator’s (Ops)
Panel (2U Enclosures)” on page 17.
• For details of the Ops panel LEDs for 5U enclosures and related fault conditions, refer to “Operator’s (Ops)
Panel (5U Enclosures)” on page 19.
• For details of the disk drive LEDs for 2U enclosures, refer to “Disk Drive LEDs (2U Enclosures)” on page
20.
• For details of the disk drive LEDs for 5U enclosures, refer to “Disk Drive LEDs (5U Enclosures)” on page
21.
Unit Identification Number
The Unit Identification Display is a dual seven segment display that can be used to provide feedback to the
user. Its primary usage is to display an Enclosure Unit Identification Number to assist users in setting up and
maintaining multiple enclosure systems.
The Unit Identification Number is permanently stored in the enclosure VPD.
The Unit Identification Display has the electrical capability of driving all seven of the segments, plus the dot/
decimal point in each character of the display.
How To Set the Unit Identification Number
Note: 5U enclosures only.
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