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Installing the enclosures
IMPORTANT:
For comprehensive configuration options and associated illustrations, refer to the
HPE MSA 2050 Cable
Configuration Guide
.
Testing enclosure connections
NOTE:
Once the power-on sequence for enclosures succeeds, the storage system is ready to be connected to hosts, as
described in
“Connecting the enclosure to data hosts” (page 26)
Powering on/powering off
Before powering on the enclosure for the first time:
•
Install all disk drives in the enclosure so the controller can identify and configure them at power-up.
•
Connect the cables and power cords to the enclosures as explained in the quick start instructions.
NOTE:
Power supplies used in MSA 2050 enclosures
•
The MSA 2050 controller enclosures and drive enclosures equipped with AC power supplies do not have power switches
(they are switchless). They power on when connected to a power source, and they power off when disconnected.
•
MSA 2050 controller enclosures and drive enclosures equipped with DC power supplies feature power switches.
•
When powering up, make sure to power up the enclosures and associated host in the following order:
Drive enclosures first
This ensures that disks in each drive enclosure have enough time to completely spin up before being scanned by
the controller modules within the controller enclosure.
While enclosures power up, their LEDs blink. After the LEDs stop blinking—if no LEDs on the front and back of
the enclosure are amber—the power-on sequence is complete, and no faults have been detected. See
for descriptions of LED behavior.
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.
Hosts last (if powered down for maintenance purposes)
TIP:
When powering off, you will reverse the order of steps used for powering on.
Power cycling procedures vary according to the type of power supply unit included with the enclosure. For controller and
drive enclosures configured with the switchless AC power supplies, refer to the procedure described under
below. For procedures pertaining to controller and drive enclosures configured with DC power supplies, see
.
IMPORTANT:
See
“Power cord requirements” (page 75)
and the QuickSpecs for more information about power cords
supported by MSA 2050 enclosures.