Asset ID:	1-71-1010926.1
Update Date:	2011-01-11
Keywords:

---

Solution Type  Technical Instruction Sure

Solution  1010926.1 :   Sun Java[TM] Workstation W1100z/W2100z Not Recognizing 4GB Of RAM  


PreviouslyPublishedAs
215075

Description
With 4 GB of RAM installed in a Sun Java[TM] Workstation W1100z/W2100z, the system will only recognize ~3.2 GB of RAM through the BIOS.


Steps to Follow
This condition is known as the Memory Hole or PCI Hole. If you have more than 3 GB of RAM in the system, there will be a memory disappearance between ~3.2 GB and 4 GB.
The PCI hole exists below 4 GB to ensure that all 32-bit software can reach those addresses. The size of the PCI hole is the total amount of PCI/AGP address space consumed for all devices as configured by the BIOS.

The size of the hole will depend on several factors such as the amount of video memory, size of the AGP Aperture, and the number of PCI devices.

Note: This is not a W1100z/W2100z specific issue, and is generic to any x86 platform which can support large memory(4GB+) footprints.

Product
Sun Java Workstation W2100z
Sun Java Workstation W1100z

Internal Comments
For internal Sun use only.

http://vsp-tm.eng/vsp-tm-root/Files/Metropolis/memory_hole.pdf

Metropolis, Sun, Java, Workstation, W1100z, W2100z, RAM, memory, PCI, hole
Previously Published As
80014

Change History
Date: 2005-05-23
User Name: 7058
Action: Approved
Comment: Changes OK to republish.
Updated review date.
Version: 6
Date: 2005-05-18
User Name: 7058
Action: Accept
Comment:
Version: 0
Date: 2005-05-18
User Name: 98797
Action: Approved
Comment: Reviewed changes to document.
Several improvements, good to go.
Version: 0
Date: 2005-05-05
User Name: 98797
Action: Accept
Comment:
Version: 0

Attachments

This solution has no attachment