HP P2000 G3 SAS MSA System User Guide 33
Testing enclosure connections
NOTE: Once the enclosures’ power-on sequence succeeds, the storage system is ready to be connected to
hosts, as described in Connecting the enclosure to data hosts on page 37.
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 installation sheet.
NOTE: P2000 G3 controller enclosures and some P2000 G3 drive enclosures do not have power
switches. They power on when connected to a power source, and they power off when disconnected.
• Generally, when powering up, make sure to power up the enclosures and associated data host in the
following order:
•Drive enclosures first
This ensures that disks in the 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 LED descriptions on page 57 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.
• Data host last (if powered down for maintenance purposes).
TIP: Generally, when powering off, you will reverse the order of steps used for powering on.
Power supply
Many controller and expansion enclosures rely on the power cord for power cycling. Connecting the cord
from the PSU power cord connector to the appropriate power source facilitates power on; whereas
disconnecting the cord from the power source facilitates power off.
Figure 11 AC PSU
To power on the system:
1. Obtain a suitable AC power cord for each AC PSU that will connect to a power source.
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