Physical Memory inconsistency, win2003

  • Thread starter Thread starter Lamont Sanford
  • Start date Start date
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Lamont Sanford

Hi,

I have a new installation of Win2003 Standard running on a new server.
4GB of physical memory is installed. The BIOS reports 4GB of total physical
memory. The Windows System Information applet reports 4GB of total physical
memory. The Task Manager, on the other hand, is reporting only 3.4gb of
total physical memory. What is causing the inconsistency?

David
 
Hi,

I have a new installation of Win2003 Standard running on a new
server.
4GB of physical memory is installed. The BIOS reports 4GB of total
physical memory. The Windows System Information applet reports 4GB of
total physical memory. The Task Manager, on the other hand, is
reporting only 3.4gb of total physical memory. What is causing the
inconsistency?

David
Click to expand...

Let me guess. This is a server class machine with RAID controller or
other high end controller that does large data transfer. It is normal
for such a controller to reserve 100 - 400 meg of memory depending on
its function. System is working correctly.


Leonard Severt

Microsoft Enterprise Support
 
Let me guess. This is a server class machine with RAID controller or
other high end controller that does large data transfer. It is normal
for such a controller to reserve 100 - 400 meg of memory depending on
its function. System is working correctly.
Click to expand...

Yes! It has a Perc RAID controller.... but the controller already has
256mb of memory built in. I'm surprised that it needs to reserve more.

David
 
Yes! It has a Perc RAID controller.... but the controller already has
256mb of memory built in. I'm surprised that it needs to reserve more.
Click to expand...

I have a BUNCH of dell servers with the PERC 2,3,4 and none of them
"reserve" any main memory for their own use - simple RAID 5 and Mirror
modes in use on all of them.
 
I have a BUNCH of dell servers with the PERC 2,3,4 and none of them
"reserve" any main memory for their own use - simple RAID 5 and Mirror
modes in use on all of them.
Click to expand...

It does not occur on every configuration but I have seen this many
times. Any time I have ever seen an odd amount of memory "missing" on a
system like that it has always been because motherboard or add-on
controller was reserving it. They do it even if they have cache on the
board. Almost all Compaqs do it and specific versions of other system do
also.

Leonard Severt

Microsoft Enterprise Support
 
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