D1012/D1024 Hardware Installation and Maintenance Guide
49
NOTE:
Allow at least 30 seconds to elapse when jointly completing the “Removing a disk drive module”
and “Installing a disk drive module” procedures.
Verifying component operation
Verify that the Power/Activity LED—located on the front face of the disk drive escutcheon—is off. On LFF
disks, this is the bottom LED. On SFF disks, this is the left LED. Both sets of LEDs are shown in
Replacing a power supply module
This section provides procedures for replacing a failed AC power supply module, also referred to as a
power supply unit (PSU). Illustrations in power supply module replacement procedures show rear panel
views of the enclosure, and PSUs are properly aligned for insertion into the rear panel of the enclosure.
A single PSU is sufficient to maintain operation of the enclosure. You need not halt operations and
completely power-off the enclosure when replacing only one PSU; however, a complete orderly shutdown is
required if replacing both power supply units.
If immediate replacement is necessary during I/O, ensure that all cables are securely fastened, and
proceed with caution as you replace the power supply CRU within the Storage Enclosure. Be very careful if
moving a cabled/operational enclosure during the CRU replacement process.
TIP:
on page 49 for additional information about power supply faults and recommended
actions.
Before you begin
CAUTION:
Removing a power supply unit significantly disrupts the enclosure’s airflow. Do not remove the
PSU until you have received the replacement module.
Verifying component failure
When either a fan or power supply component fails, the PSU’s status LED color changes to amber to
indicate a fault condition.
Table 22
Power supply faults and recommended actions
Problem
Recommended action
Power supply fan warning or failure, or power supply
warning or failure
•
Verify that all fans are working.
•
Ensure that the power supply modules are properly
seated and secured within their slots.
•
Ensure that no slots are left open for more than two
minutes. If you must replace the
CRU
, leave the old
module in place until the replacement arrives to
maintain optimal airflow and avoid overheating.
Power supply module failure status, or voltage event
notification
•
Verify that the power supply module is powered on.
If your power supply module has a power switch,
verify that it is switched on.
•
Verify that the power cables are securely attached to
the power supply module and the appropriate power
source.
•
Replace the
CRU
if necessary.
AC Power Good LED is off
Same as above.
