FreeBSD-6.3 only detects 3GB of RAM
Ivan Voras
ivoras at freebsd.org
Thu Mar 27 07:35:41 PDT 2008
lhecking at users.sourceforge.net wrote:
> fred writes:
>> Hello all,
>>
>> I am trying to fix an issue with my dual xeon ibm server, it only detects
>> 3GB or RAM but I have 4GB:
> [...]
>
> I have seen this problem under Linux on IBM Intellistations (6225).
> IBM pointed me to a tech document (the number of which I do not
> remember) that says when the machine detects more than 3GB, it uses
> some of that memory internally for ... stuff. Still, I find stealing
> 1GB quite unacceptable.
This question is answered almost once a week. Search the archives and
you will find plenty of explanations, both long and short.
Short version: you cannot use memory near 4 GB on 32-bit operating
systems (it's a hardware limitation). You can either compile a kernel
with PAE (http://en.wikipedia.org/wiki/Physical_Address_Extension) or a
64-bit version of the operating system (in FreeBSD it's called AMD64
since AMD was first to create the hardware,
http://en.wikipedia.org/wiki/AMD64).
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 189 bytes
Desc: OpenPGP digital signature
Url : http://lists.freebsd.org/pipermail/freebsd-questions/attachments/20080327/689b3e46/signature.pgp
More information about the freebsd-questions
mailing list