Deployment Guide

Testing enclosure connections
See Powering on on page 31. Once the power-on sequence succeeds, the storage system is ready to be connected as
described in Connecting the enclosure to hosts on page 22.
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 Dell EMC PowerVault ME4 Series Storage
System Owner’s 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 Typical AC power cable connection from PDU to PCM (2U) on page
30.
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 Typical AC power cable connection from PDU to PSU (5U) on page
30.
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 on page 71 for details pertaining to 2U Ops panel LEDs and related fault conditions.
● See 5U enclosure Ops panel on page 72 for details pertaining to 5U84 Ops panel LEDs and related fault conditions.
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.
Connect power cables and power on the storage system
31