IBM 6580 User Manual

System Error Log
The system logs (records) errors in
the system memory. This information
can be stored on a diskette by eith~r
the operator or the CSR. The CSR can
display the error log to determine
what errors have occured in the
system.
The errors are detected by a combina-
tion of hardware error circuits, which
include RAM parity checks, Cyclic
Redundancy Check (eRC) , and
electro-mechanical sensors.
Hardware error circuit outputs are
made available to software error con-
trolling routines. These routines
control the status of indicators (LEDs
or display error codes), prompts and
messages for the operator or the CSR
for use in problem determination and
diagnostics.
The system logs both soft and hard
errors. Soft errors can be recovered
from by an automatic re-try of the
failing operation. An example is a
diskette read or write error. (See
Figure 9-28.) This error may be
recovered from by re-trying the
read/write operation. When a soft
error occurs, it is logged in the sys-
tem error log.
A limit is set in the system for the
maximum number of times a soft error
may be re-tried. When the number of
re-tries for an error is more than the
set limit, the error will be recog-
nized as "hard" and will need manual
correction procedures to recover.
For errors that need manual correction
procedures, the customer will be-
instructed to use the Prompts and Mes-
sages section of the Operator Refer-
ence Manual to recover. These errors
may include machine checks for
processor or RAM failure, mechanical
paper jams in a printer, card jams in
a Mag Card deck, and similar failures.
For errors that cannot be recovered
from, the Problem Determination Proce-
dures will guide the customer through
data collection procedures such as
dumping the error logs to the Memory
Record Diskette and making a note of
the status of indicators.
Note: Because the error log is con-
tained in RAM, it will be lost when
system power is turned off, or when a
program diskette is loaded, if it is
not first dumped to a diskette.
9-30 IBM Displaywriter Product Support Manual

IBM 6580 Specifications

General

Brand	IBM
Model	6580
Category	Desktop
Language	English