Verifying The Mic Connections; Checking The Ssdl Leds - HP NetServer AA 4000 Reference Manual

HP NetServer AA

Verifying the MIC connections

Checking the SSDL LEDs

2-2
Before booting the system, a quick visual verification of the
connections between the MICs and the SSDLs should be performed.
A more through verification can be performed using the MTCTEST
utility. It is important to make sure the MIC connections are good
before powering up the system and re-checking the connections
when a failure of any type occurs in the system. A quick visual
inspection can save hours of needless troubleshooting if in fact there
is a problem with a MIC cable or even the MIC itself.
On the front of each SSDL are a series of LEDs that help verify that
the MIC cards are in good working order and the MIC cable
connections are correct. However, this is not the final verification
that all is in good working order. There are rare instances when all
LEDs indicate a working system, but there may still be a minor
problem with a MIC cable. The occurrence is rare enough that the
LEDs can be "trusted" and the cable connections can be ruled out as
the cause of a problem when troubleshooting. But in the rare
instance that all other troubleshooting is not pinpointing the problem,
the cable connections can be re-verified through the use of the
MTCTEST utility.
The above is a graphic of both SSDLs. In the middle of the SSDLs
are the LED indicators. Below is a close-up of how the LEDs are
organized.
Compute
I/O
Link
There are three columns for LEDs, the third column was for a
possible future development and is not used. Column 1 represents
tuple 1 and column 2 represents tuple 2. The Compute row shows
the status of the MIC connections from the CEs to the SSDLs (1 and
2). The I/O row indicates the status of the MIC connections from the
1 2
3
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