IBM TotalStorage SAN140M, Installation And Service Manual

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13 Chapter 1: General information
Error-detection, reporting, and serviceability features
The director provides the following error detection, reporting, and
serviceability features:
• Light-emitting diodes (LEDs) on director FRUs and the front
bezel that provide visual indicators of hardware status or
malfunctions.
• Redundant FRUs (logic cards, power supplies, and cooling fans)
that are removed or replaced without disrupting director or Fibre
Channel link operation.
• A modular design that enables quick removal and replacement of
FRUs without the use of special tools or equipment.
• System alerts and logs that display director, Ethernet link, and
Fibre Channel link status at the management server (running a
SAN management application), client communicating with the
management server, or EFCM Basic Edition interface.
• Diagnostic software that performs power-on self-tests (POSTs)
and port diagnostics (internal loopback, external loopback, and
Fibre Channel (FC) wrap tests). The FC wrap test applies only
when the director is configured to operate in FICON management
style.
• An RS-232 maintenance port at the rear of the director (port access
is password protected) that enables installation or service
personnel to change the director’s internet protocol (IP) address,
subnet mask, and gateway address; or to run diagnostics and
isolate system problems through a local or remote terminal.
The director parameters can also be changed through a Telnet
session, access for which is provided through a local or remote PC
with an Internet connection to the director.
• Data collection through the Element Manager application or the
EFCM Basic Edition interface to help isolate system problems.
The data includes a memory dump file and audit, hardware, and
engineering logs.
• Beaconing to assist service personnel in locating a specific port,
FRU, or director in a multiswitch environment. When port
beaconing is enabled, the amber LED associated with the port
flashes. When FRU beaconing is enabled, the amber (service