Table of Contents
Advertisement
10 In-service field maintenance for 5U enclosures
You may service the identified 5U enclosure FRUs and still maintain continuous operation during the replacement, but with
two very important qualifiers:
You must determine whether your system allows for continuous operation during service replacement of the 5U enclosure
l
drive modules in their carriers (DDICs) without interrupting access to enclosure file systems.
You must complete the replacement in the allotted time, replacing only one FRU at a time. The 5U enclosure design
l
provides for redundancy, so the loss of a single FRU does not impact functionality for a limited time.
The tasks identified in this chapter first cover FRUs in the drawers, followed by FRUs accessible from the rear panel area. It is
essential you adhere to all safety precautions when servicing 5U enclosure FRUs.
CAUTION When performing maintenance on the expansion enclosure or its components:
Observe the caution label affixed to each drive module or FRU prior to handling or replacing it.
l
Do not remove a defective FRU until you have its functional replacement ready for insertion.
l
To adhere to safety precautions when replacing a FRU in the 5U enclosure:
1. Replace any defective FRU with a fully operational one as soon as possible.
2. Replace any defective FRU within the identified replacement time to minimize air loss and maintain optimum cooling within
the 5U enclosure.
Table 10 5U enclosure time limits for FRU replacement
Defective FRU
Drawers
Drive, LFF or SFF, in carrier (DDIC)
Rear panel area
Fan cooling module (FCM)
Power supply unit (PSU)
Input/output module (IOM)
Attachments
Rackmount rail kit
Cable kits: Standard HD mini-SAS to HD mini-SAS (SF-8644)
AC power cord, compatible
3. Prevent electrostatic discharge from damaging the 5U enclosure or its components.
a. Keep a static-protected work surface clear of clutter, including plastic, vinyl, and foam.
b. Transport and store FRUs in static-safe containers.
c. Keep FRUs in their containers until reaching a clear, static-protected work surface.
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.
82 Chapter 10 In-service field maintenance for 5U enclosures
Replacement time limit
7 minutes, including drawer closure
7 minutes
7 minutes
7 minutes
N/A
N/A
N/A
Advertisement
Table of Contents
