Testing Enclosure Connections; Grounding Checks - Dell EMC PowerVault ME4 Series Deployment Manual

Testing enclosure connections

See Powering on. Once the power-on sequence succeeds, the storage system is ready to be connected as described in
enclosure to hosts.

Grounding checks

The enclosure system must be connected to a power source that has a safety electrical grounding connection.
CAUTION: If more than one enclosure goes in a rack, the importance of the grounding connection to the rack increases
because the rack has a larger Grounding Leakage Current (Touch Current). Examine the grounding connection to the
rack before power on. An electrical engineer who is qualified to the appropriate local and national standards must do the
examination.
Powering on
CAUTION: Do not operate the enclosure system until the ambient temperature is within the specified operating range
that is described in the system specifications section of the
Manual . If the drive modules have been recently installed, ensure that they have had time to adjust to the environmental
conditions before they are used with production data for I/O.
• With 2U enclosures, power on the storage system by connecting the power cables from the PCMs to the PDU, and moving the power
switch on each PCM to the On position. See
The System Power LED on the 2U Ops panel should be lit green when the enclosure power is activated.
• With 5U84 enclosures, power on the storage system by connecting the power cables from the PSUs to the PDU, and moving the
power switch on each PSU to the On position. See
The Power on/Standby LED on the 5U84 Ops panel should be lit green when the enclosure power is activated.
• When powering up, ensure to power up the enclosures and associated data host in the following order:
• Drive enclosures first – Ensures that the disks in the drive enclosure have enough time to completely spin up before being scanned
by the controller modules within the controller enclosure. The LEDs blink while the enclosures power up. After the LEDs stop
blinking – if the LEDs on the front and back of the enclosure are not amber – the power-on sequence is complete, and no faults
have been detected.
• Controller enclosure next – Depending upon the number and type of disks in the system, it may take several minutes for the
system to become ready.
• Data host last (if powered off for maintenance purposes).
When powering off, reverse the order of steps that are used for powering on.
NOTE: If main power is lost for any reason, the system automatically restarts when power is restored.
Enclosure Ops panels
• See 2U enclosure Ops panel
• See 5U enclosure Ops panel
Guidelines for powering enclosures on and off
• Remove the AC cord before inserting or removing a PCM (2U) or PSU (5U84).
• Move the PCM or PSU switch to the Off position before connecting or disconnecting the AC power cable.
• Allow 15 seconds between powering off and powering on the PCM or PSU.
• Allow 15 seconds before powering on one PSU or PCM in the system, and powering off another PCM or PSU.
• Never power off a PCM or PSU while any amber LED is lit on the partner PCM or PSU.
• A 5U84 enclosure must be left in a power on state for 30 seconds following resumption from standby before the enclosure can be
placed into standby again.
• Although the enclosure supports standby, the expansion module shuts off completely during standby and cannot receive a user
command to power back on. An AC power cycle is the only method to return the 5U84 to full power from standby.
Figure 28. Typical AC power cable connection from PDU to PCM
Figure 29. Typical AC power cable connection from PDU to PSU
for details pertaining to 2U Ops panel LEDs and related fault conditions.
for details pertaining to 5U84 Ops panel LEDs and related fault conditions.
Dell EMC PowerVault ME4 Series Storage System Owner's
Connect power cables and power on the storage system
Connecting the
(2U).
(5U).
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