Data General NOVA ECLIPSE 6234 Service Manual page 92

Data General Corporation (OGC) has prepared this manual for use by DGC 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 DGC'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 3 of 3)
Function
Read
Data Errors
Checkword
Failed
Description
All read errors with the exception of data related
errors are handled in the same manner as those
described for write errors.
Data is read 3 times (4 times for an undetected
checkword). If the program is in write/read mode
and the data is bad on two passes, a hard error count
is incremented and an error return taken. If data
is good on all retries, a soft error count is
incremented and a normal return taken. If SWREG 9
=
1, the data check is bypassed, and hard or soft
data errors are to be determined by the checkword
status.
The disk addresses of data problems are printed
and the first 100 logged. The first three
good/bad word pairs and respective addresses are
printed.
Data errors reporting on the same cylinder number,
head number, and sector number at different times
during REL! usually indicate that a bad sector has
been encountered and must be flagged using command
string SA 503.
Two conditions may fall into this category.
1. A checkword was detected with no accompanying
data error. This error indicates, check-
word problem.
2. A data error occurred without a corresponding
checkword error.
Both of these checkword failures are counted once
per error path under the corresponding drive
statistics summary headings.
015-000133
4-48
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