Operation Of 2U Enclosures; Apply Power To The 2U Enclosure - Seagate Exos E 2U12 Series Hardware Installation And Maintenance Manual

6 Operation of 2U enclosures

CAUTION Only operate the expansion enclosure in a dust-free environment to meet temperature control and airflow
requirements.
Before you power on the 2U enclosure, you must take the following actions:
1. Review the installation checklist, confirming the successful completion of the entire sequence.
2. Verify that all drive modules in their carriers (DDICs) are in the correct slots and that you properly engaged them by
pressing firmly until each one locked into place on its midplane.
3. Confirm you have met ambient temperature requirements identified in the Environmental Reqs section.
4. Confirm that airflow paths at the front and rear of the enclosure chassis are clear and remain clear.
5. Proceed to the power on task.
6. Access the software management interface to complete your system setup.

Apply power to the 2U enclosure

The 2U enclosure relies on main power provided through separate, independent power distribution. If you lose main power for
any reason, the 2U enclosure automatically restarts after power restoration.
CAUTION Adhere to the following electrical safety guidelines:
During installation, never connect a power cord to a power supply unit (PSU) or power cooling module (PCM) before
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installing it in the appropriate expansion enclosure slot.
Only connect the power cord to power that complies with the product specifications within the specified range, per the
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hazardous voltage warning label on the PSU or PCM.
During service, always remove the PSU or PCM from power before removing the PCM.
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IMPORTANT Only after you successfully complete the installation checklist can you complete system setup and begin
operation of the expansion enclosure.
To apply power to the 2U enclosure:
1. If you removed power to repair the 2U enclosure, begin by facing the rear of the rack cabinet and connect the plug for each
of the power to an independent power distribution unit (PDU). The second power cooling module (PCM) provides the first
PCM with redundant power.
IMPORTANT The expansion enclosure design requires two redundant power cooling modules (PCMs). You must
plug each power cord into an independent power distribution unit (PDU) that connects to an uninterruptible power
system.
2. Press the power switch to the ON position for each PCM.
3. Facing the front, observe the LEDs on the front panel area and confirm the Power On LED is in a steady green state. If it is
flashing amber, proceed to
46 Chapter 6 Operation of 2U enclosures
"Hardware installation and configuration issues" on page 57.