D1012/D1024 Hardware Installation and Maintenance Guide
27
, describes power cycling procedures relative to PSUs
installed within enclosures.
Powering on/powering off
Before powering on the enclosure for the
first
time:
•
Install all disk drives in the enclosure.
•
Connect the cables and power cords to the enclosure as described herein.
NOTE:
Storage Enclosure 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:
• All Storage Enclosures
first
This ensures that the disks in the Storage Enclosure have enough time to completely spin up before
being scanned by the ESMs within the Storage 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
on page 18 for descriptions of LED behavior.
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.
AC PSU
Storage Enclosures configured with switchless PSUs 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 15
AC PSU
To power on the system:
1.
Plug the power cord into the power cord connector on the back of the Storage Enclosure. Plug the other
end of the power cord into the rack power source (see
). Wait several seconds
to allow the disks to spin up.
Repeat this sequence for each switchless PSU within each Storage Enclosure.
2.
Plug the power cord into the power cord connector on the back of the Storage Enclosure. Plug the other
end of the power cord into the rack power source (see
).
Repeat the sequence for the Storage Enclosure’s other switchless PSU.
Power cord connect
