Chapter 10 In-service field maintenance for 2Uenclosures 91
e. Use heel straps, toe straps, or boot straps on both feet to ground to your conductive floor or dissipating
floor mat or use a portable field service kit with a grounded, static-dissipating work mat.
f. Use conductive field service tools.
g. When removing a FRU, immediately place it in anti-static packaging.
h. Avoid touching pins, leads, or circuitry.
Replace a 2U enclosure drive module in its carrier
The operator's (ops) panel registers either a logical fault or a hardware fault or both. The drive module in its
carrier (DDIC) uses an amber LED to identify various states and fault conditions. The asterisk (*) indicates a
fault condition.
Color State Status
Amber
On*
The drive module has a hardware fault, so replace as soon as possible
The power control circuit has a hardware fault
Fast flash (1s on, 1s off) Unit identification (UID) bit is set
Slow flash* (3s on, 1s off) Failed array
Off
Drive is functioning normally
No AC power is present
Figure 64 2U12 and 2U24 fault LEDs on carrier bezel
An important feature of the storage enclosure design is redundancy. The storage enclosure will maintain
continuous operation during the replacement of a single DDIC, if it is within the time limit of 5 minutes, since
opening a drawer to remove a DDIC significantly reduces airflow in the 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 and, when applicable,
fully close the related drawer 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.
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