IBM Support

UnixWare 7 and OpenUnix 8 do not recognize more than 4GB memory - Servers

Troubleshooting


Problem

Source Retain tip H17364 Symptom After you have installed more than 4GB memory in an IBM xSeries or Netfinity server, UnixWare 7 and OpenUnix 8 recognize only 4GB even though BIOS reports the correct amount. Affected configurations The s

Resolving The Problem

Source

Retain tip H17364

Symptom

After you have installed more than 4GB memory in an IBM eServer xSeries or Netfinity server, UnixWare 7 and OpenUnix 8 recognize only 4GB even though BIOS reports the correct amount.

Affected configurations

The system is any of the following IBM xSeries servers:

  • An xSeries 370, Type 8681, any model
  • An xSeries 360, Type 8686, any model
  • An xSeries 350, Type 8682, any model
  • An xSeries 342, Type 8669, any model
  • An xSeries 340, Type 8656, any model

The system is any of the following IBM Netfinity servers:

  • A Netfinity 8500R server, Type 8681, any model
  • A Netfinity 7600 server, Type 8665, any model
  • A Netfinity 7100 server, Type 8666, any model
  • A Netfinity 7000-M10 server, Type 8680, any model
  • A Netfinity 6000R server, Type 8682, any model

The following network operating systems are affected:

Caldera UnixWare, version 7.1.1
Caldera OpenUnix, version 8

The system has the symptom described above.

Solution

Within the operating system, use your favorite editor (such as "vi") and edit the following two files:

  1. /stand/boot
    1. Add the following line:
       
      ENABLE_4GB_MEM=YES
       
      NOTES:
      1. Make sure that you place an underline between ENABLE
        and 4GB, as well as between 4GB and MEM.
      2. There are no spaces and all letters are uppercase.

    1. Save and exit.
  1. /etc/conf/sdevice.d/pse
  1. Cursor down to the line with the capital N.
  2. Change the N to Y.
  3. Save and exit.

Type the following command to relink or rebuild the unix kernel:
 
/etc/conf/bin/idbuild -b
 
Finally, shut down and reboot your server for the new kernel to take affect.
 
You can check the memory settings after reboot by typing the following command:
 
memsize -a

Additional information

By default, UnixWare 7 and OpenUnix 8 recognize a maximum of only 4GB memory.

 

 

Document Location

Worldwide

Operating System

Older System x:Caldera Open UNIX 8.x

Older System x:SCO UnixWare

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Document Information

Modified date:
28 January 2019

UID

ibm1MIGR-42440

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