ECA 059 - 8570 A21/r21 parity check
ECA 059 - 8570 A21/R21; parity check
Parity check errors on 8570 A21 & R21 models
PURPOSE:
This ECA authorizes system board replacement to correct
false system board memory parity errors on some 8570 systems.
Machines AFFECTED
8570 A21 386 / 25 MHz
8570 R21 486 / 25mhz
PHYSICAL check:
Before installing hardware FRUs, all software fixes should be applied
to the installed operating system of the 8570 / 25 MHz systems.
To be eligible for ECA:059, the following conditions must be met:
8570 model A21 (386 / 25 MHz) systems must be
experiencing the parity check on systems containing system
board FRU P/N 15F7657, 8570 models R21 and i486 Power platform
systems must contain system board FRU P/N 64F0122.
Both system boards must have a date code of 8933xx or higher on the
module located in location U142. earlier date codes are good.
date code info: 89 = year, 33 = week of year, xx = plant location.
module location: U142 is the longest module next to
the inner most memory module socket J17.
NOTE: The processor card does not have to be removed to see
the date code.
The system board must have memory installed in more than one
system board socket in order to experience this problem.
DETAIL:
Intermittent errors caused by the condition normally occur at
POST, or during operation shortly after POST. Because this error
is normally caused by defective memory SIMMs, it is recommended
that system board memory be considered before the system board
is replaced. Failing memory is not covered by this ECA:.
Advanced diagnostics must be run so solid hardware failures, not
associated with this failure, can be eliminated. all software
operating systems should have the latest upgrades applied to
them. For example OS.2 1.1 extended requires the WR03089
corrective service diskette (CSD) and OS/2 1.2 extended requires
the WR04098 CSD.
This ECA covers system board replacement when:
- all requirements in the physical check are met.
- all the symptoms of the operating systems listed below are met.
The following examples show how various operating systems
display this parity error:
----------------------------------------------------------------
All levels of DOS will display a message that reads
"parity check 1"
----------------------------------------------------------------
OS/2 will display TRAP error 0002. The screen will read
"the system detected a hardware memory error on the system
board. The system stopped. Run the diagnostics supplied
with your system to determine the cause of your problem.
**TRAP 0002**
(other variable information will be here)
errcd=0001
(other variable information will be here)
----------------------------------------------------------------
AIX will display a message that reads:
NMI_ERR: memory parity error
----------------------------------------------------------------
XENIX and UNIX will display a message that reads:
"PANIC: NMI : ERROR: memory failure - parity error"
If the XENIX or UNIX systems have a file called OEM.O driver
or they are at version 2.34 or higher the following message
will also be included.
"non maskable interrupt, cause = xx"
(the xx can be any characters)
NOTEs:
For the 8570 model A21 order system board FRU P/N 92F0580.
For the 8570 model R21 i486 Power platform order
board FRU P/N 92F0581
These system boards are now the current FRU part numbers and
will be automatically substituted for old FRU part orders.
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