Chapter 10 In-service field maintenance for 2U enclosures
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2. Complete the following actions to replace it with a tested, good DDIC:
a. Using a thumb and forefinger, squeeze the carrier release latch to release the carrier handle.
Figure 66 Replacement with open 2U12 and 2U24 carrier handle
b. Use one hand to support the weight of the DDIC and the other to holding it against the bottom of the slot.
c. Slide the carrier inward until the cam lever of the handle is flush with the chassis.
d. Firmly press the handle closed until you hear an audible click as it engages the midplane and locks in
place.
3. Confirm that the DDIC fault condition LED is off and the operator's (ops) panel is clear of any fault
conditions.
Replace a 2U enclosure controller module
Each controller module (CM) manages the flow of data to and from the storage enclosure. Each CM provides
a very specialized, solutions-specific interaction that depends on your system configuration and software
implementation, including SAS zoning, failover and failback procedures, and multipath procedures.
An important feature of the storage enclosure design is redundancy. The enclosure will maintain continuous
operation during the replacement of a single CM, as long as it is within the time limit of 5 minutes, since
removal of a CM significantly reduces airflow in the storage enclosure.
CAUTION If you remove any FRU while the storage enclosure is powered up, you must replace it with a
tested good spare within the allotted time for that FRU. If you do not replace the FRU within the identified time
limit, you void the product warranty and the storage enclosure might overheat, causing equipment failure and
possible data loss.
CAUTION Do not remove covers from any FRU. There is a danger of electric shock inside. Return the
FRU to your supplier for repair.
The CM has a number of ports, each with independent status LEDs. Those items in the state column with an
asterisk (*) indicate a fault condition.
