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3.583 bytes |
Service Hints & Tips |
Document ID: GSMH-39WGAQ |
IBM PC730/PC750 - External cache failure using QAPlus/Pro
Applicable to: World-Wide
Symptom:
PC 700 systems may exhibit an external cache diagnostic failure when running memory diagnostics using QAPlus/PRO version 5.22 and 5.28.
Problem Isolation Aids:
PC 700 systems are capable of memory interleaving for improved system performance. To enable memory interleaving, there must be four "like" simms installed. For example memory interleaving will function with four 8Mb simms, but not with two 8MB and two 4MB simms installed.
QAPlus/PRO versions 5.22 and 5.28 do not have the capability to diagnose systems using memory interleaving. The result is a false diagnostic error indicating that the external cache has failed.
QAPlus/WIN is not affected. QAPlus/WIN, which is preloaded on models with DOS and Windows 3.X does not perform the same test that QAPlus/PRO is performing when the false error occurs. QAPlus/FE may indicate the same false diagnostic failure as QAPlus/PRO. QAPlus/FE is not recommended for use on PC 300 or PC 700 systems. Other false diagnostic errors may occur using this version of QAPlus.
For further information on using QAPlus/FE on PC 300/PC 700 systems, please Double-Click here:- 
Fix:
Do not replace hardware. A new version of QAPlus/PRO is being developed that will allow testing of a system with interleaved memory. This tip will be updated with information regarding the new version of QAPlus/PRO and ordering information.
SAS KEYWORDS:
PSY2 D/T68XX D/T6573 D/T6583
D/T6571 D/T6581 D/T6575 D/T6585
D/T6876 D/T6886 D/T6875 D/T6885
68XX 6573 6583 6571
6581 6575 6585 6876
6886 6875 6885 PSY2PROG
PSY2ERR PSY2DIAG IBMPC PSVP
QAPLUS
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Search Keywords |
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Hint Category |
Diagnostics, Retain, Memory | |
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Date Created |
26-09-95 | |
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Last Updated |
19-11-98 | |
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Revision Date |
19-11-99 | |
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Brand |
IBM PC | |
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Product Family |
PC 730, PC 750 | |
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Machine Type |
6875, 6876, 6885, 6886 | |
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Model |
various | |
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TypeModel |
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Retain Tip (if applicable) |
H126939 | |
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Reverse Doclinks |