Chapter 11 In-service field maintenance for 5U enclosures
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d. Always wear a grounded ESD wrist strap that meets a minimum 1 megohm (± 10%) resistance standard
and that is snug against your skin.
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 5U enclosure drive module in its carrier
The operator's (ops) panel registers either a logical fault or a drawer hardware fault or both. You must locate a
faulty drive in its carrier (DDIC) within the related drawer by its amber fault condition LED.
Color
State
Status
Amber
On*
Drive has hardware fault, replace as soon as possible
Drive link down
Fast flash (1s on, 1s off)
Unit identification (UID) or locate is active for drive
Slow flash* (3s on, 1s off)
Drive in critical condition
Failed array
Off
No AC power present
Drive initialization in process
Drive quarantined
Figure 73 Drive fault LED 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 7 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.
The steel carrier provides thermal conduction, radio frequency, electro-magnetic induction, and physical
protection. For this task, treat the drive carrier and its installed drive as a single FRU.
