Data General NOVA ECLIPSE 6234 Service Manual page 91

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Data General Corporation (OGC) has prepared this manual for use by OGC personnel and customers as a guide to the proper installation, operation, and
maintenance of OGC equipment and software. The drawings and specifications contained herein are the property of DGC and shall neither be reproduced in
whole or in part without OGC's prior written approval nor be implied to grant any license to make, use, or sell equipment manufactured in accordance herewith.
Table 4-11.
Reliability Program Output and Error Description
{page 2 of 3)
Function
Write
Description
The "Done" flag is set after a write, and errors are
checked in the sequence that follows. An error
recovery procedure is outlined for each case. If the
error is not present, the next check is made.
1. Interrupt timeouts, any drive fault - increments
the appropriate error count, prints the illegal
status and does an error return.
2. Bad sector error - checks for sectors which have
their bad flag set denoting surface defects. The
program logs the first 100 bad sector addresses
encountered. No printout results unless SWREG
10
=
1. A "soft" error is recorded if the
sector under scrutiny passes at least 1 of 4 of
the retries. Soft errors print out regardless
of the state of SWREG 10.
3. Address error - prints error header, the Byte i
and the contents of the first header byte
in error. Repeats the write, and if the test
passes the second time, it increments the soft
address error count and does a normal return. If
the test fails the second time, it increments the
hard address error count and does an error return.
If an address error occurs on the first sector
transfer, a read on an adjacent head will be
attempted to determine whether the fault should be
classed as a seek error or an address error. The
first 20 errors have their addresses logged.
4. Ending memory address error - increments the
memory address error count, prints the error
message, checks for a disk address error and does
an error return.
5. Ending disk address error - increments the disk
address error count, prints the error message, and
does an error return •
015-000133
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