Table of Contents
Advertisement
7.1.1.3
Module D - Hardware Exerciser -
An image of Module D is written to
and executes from Program RAM.
Test 1
Maximum Activity Test - This test passes internalloopback data
frames through the LANCE and synchronous ports. This forces maxi-
mum internal Server activity including bus contention between
LANCE, DMAs and the memory accesses.
7.1.2 Error Types
Server hardware failures are considered to be fatal (hard) errors or non-fatal
(soft) errors, depending on their effect on the Server's operation.
Soft Errors
Hard Errors
Soft errors consist of failures that may not interfere with nor-
mal Server operation but can affect its overall efficiency.
On its completion, Self-Test sets the GREEN OK LED indica-
tor to ON and pushes a status parameter longword onto the
stack, identifying the error, for later evaluation by the Server
software.
Hard errors are failures that can disable the Server or cause
unreliable or unpredictable operation.
Self-Test turns off the GREEN OK LED indicator and calls
the Error routine. Unexpected traps and all Manufacturing
Mode test failures are hard errors.
7.1.2.1
Soft Errors -
Soft errors consist of the following types of failures:
•
EEPROM Checksum Error (not in the ECO/LANCE revision area)
•
LANCE Error (heartbeat or externalloopback error)
•
Terminal Port Error
Field replacement of the Server is normally not necessary but may be desir-
able. The Server always tries to enter a normal operating state.
Table
7-1
describes the soft error types. Table
7-2
describes the status param-
eter longword that Self-Test pushes onto the stack before issuing a downline
load request.
4
CHAPTER 7 DIAGNOSTICS
Advertisement
Table of Contents
