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Document ID: SCOD-43UNZ8 |
PC Server 320 / 520 - BIOS 27A and 28A could corrupt system time and date
Applicable to: World-Wide
Source: Retain tip H015613
Abstract: BIOS 27A AND 28A COULD CORRUPT SYSTEM TIME AND DATE
SYMPTOM:
System experiencing invalid time and date regardless the year.
PROBLEM ISOLATION AIDS:
a PC Server 320, Type 8640, any PCI/Micro Channel Model.
a PC Server 520, Type 8641, any PCI/Micro Channel Model.
Search on either "PC Server 320 BIOS" or "PC Server 520 BIOS"
Validate the fix immediately after the new BIOS update is complete. Simply set the system time to 19:00 and reboot the system within 1 minute, then re-check the time.
WORKAROUND:
Make sure BIOS 1A, Read Real Time Clock call (AH=2) is not used in the time period from 19:00 to 19:05, inclusively. Including power on or reboot the machine to load Operating System.
DETAILS:
BIOS could corrupt the Real Time Clock's time and date registers if the following event occur:
1. System reboot in the time period between 19:00 and 19:05, and the Read Real Time Clock BIOS call is executed.
-- OR --
2. Any time a Read Real Time Clock BIOS call is used between 19:00 and 19:05, by software, such as operating system, device driver or applications.
SAS KEYWORDS:
PS2Y, D/T8640, PCSERVER, UNCLASSIFIED, TIME, D/T8641, BIOS, 106602, 27A, 28A, 29A, PLANAR, 8640BRD, 8641BRD, 8640MCD, 8641MCD
Search Keywords |
PS2Y, D/T8640, PCSERVER, UNCLASSIFIED, TIME, D/T8641, BIOS, 106602, 27A, 28A, 29A, PLANAR, 8640BRD, 8641BRD, 8640MCD, 8641MCD | |
Document Category |
Retain | |
Date Created |
05-01-99 | |
Last Updated |
11-02-99 | |
Revision Date |
14-01-2000 | |
Brand |
IBM PC Server | |
Product Family |
PC Server 320, PC Server 520 | |
Machine Type |
8640, 8641 | |
Model |
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TypeModel |
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Retain Tip (if applicable) |
H015613 | |
Reverse Doclinks |
Date last altered: A99/02/09 |