Installation
E F 3 0 1 5 S e t u p G u i d e ( R e v A )
12
2.2
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 enclosure as explained in the installation
sheet.
NOTE :
Newer AC power supply units (PSUs) do not have power switches.
Switchless
PSUs power on when connected to a power source, and 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 the 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 Appendix
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 cycling procedures vary according to the type of power supply unit included within
the enclosure. For controller and drive enclosures configured with switchless AC PSUs,
refer to the procedure described in
below. For procedures pertaining to a)
controller enclosures configured with DC PSUs, or b) previously installed expansion
enclosures featuring power switches, see
