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DATA CORRUPTION ON HPFS386 DRIVES OR BOOT FAILURE



Subject: DATA CORRUPTION ON HPFS386 DRIVES OR BOOT FAILURE
New Netfinity server RETAIN Tip: 

    Record number:       H165854
    Device:              D/T8476
    Model:               M
    Hit count:           UHC00000
    Success count:       USC0000
    Publication code:    PC50
    Tip key:             005
    Date created:        O99/02/10
    Date last altered:   A99/02/10
    Owning B.U.:         USA

Abstract: DATA CORRUPTION ON HPFS386 DRIVES OR BOOT FAILURE


TEXT:

Fixpak IP08528 can cause data corruption on HPFS386 drives or boot failure.


SYMPTOMS:

LAN Server FixPaks starting with FixPak IP08508 contain performance enhancement code that can cause data corruption or boot failure when turned on.
The boot failure is sometimes seen as a Trap 00E at boot time.
The default state of this performance enhancement code was off until FixPak IP08528.
Starting with FixPak IP08528 the default state of this code is ON.
On the first reboot after installing IP08528, corruption can occur.


PROBLEM ISOLATION AIDS:



a Netfinity 7000-M10 server, Type 8680, any Model.
a Netfinity 7000 server, Type 8651, any Model.
a Netfinity 5500-M10 server, Type 8661, any Model.
a Netfinity 5500 server, Type 8660, any Model.
a Netfinity 5000 server, Type 8659, any Model.
a Netfinity 3500 server, Type 8644, any Model.
a Netfinity 3000 server, Type 8476, any Model.
a Netfinity 704 server, Type 8650, any Model.
a PC Server 720, Type 8642, any Model.
a PC Server 520, Type 8641, any Model.
a PC Server 500, Type 8641, any Model.
a PC Server 330, Type 8640, any Model.
a PC Server 325, Type 8639, any Model.
a PC Server 320, Type 8640, any Model.
a PC Server 315, Type 8638, any Model.
a PC Server 310, Type 8639, any Model.
a PC Server 300, Type 8640, any Model.

OS/2 Warp Server Advanced Version 4 with FixPack IP08528 applied.
The system has the described symptoms.


WORKAROUND:

The temporary fix for the problem is to not turn the performance enhancement code on in FixPaks prior to IP08528, or to turn it off if IP08528 is installed.
To turn it off, type HPFSPERF NO at the command line if the system can be booted.
If the system will not boot, boot from HPFS386 boot diskettes and add the following four lines to the bottom of HPFS386.INI:

       [commit_heuristics]
       async = no
       sort = no
       merge = no
HPFS386.INI is found in the ibm386fs directory on the boot drive.


DETAILS:

Final fix not available yet.

All FixPaks after IP08528 will have the feature off as the default until the actual problem with the code can be corrected.

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