For several years, there has been an on going discussion on whether or not to enable the /3GB switch in the boot.ini file for an SBS server. By and far, the consensus of opinion has been to NOT use the /3GB option – especially considering that WSS 2.0 or later versions do not support the /3GB switch.
Susan’s blog (2005):
http://msmvps.com/blogs/bradley/archive/2005/06/25/55763.aspx
http://msmvps.com/blogs/bradley/archive/2005/06/25/55763.aspx
Wayne’s blog (2006):
http://www.sbsfaq.com/Lists/FAQs/DispForm.aspx?ID=136
http://www.sbsfaq.com/Lists/FAQs/DispForm.aspx?ID=136
Susan’s blog (2007):
http://msmvps.com/blogs/bradley/archive/2007/10/05/the-3gb-switch.aspx
http://msmvps.com/blogs/bradley/archive/2007/10/05/the-3gb-switch.aspx
Microsoft KB article (2007):
http://support.microsoft.com/default.aspx?scid=kb%3BEN-US%3B933560
http://support.microsoft.com/default.aspx?scid=kb%3BEN-US%3B933560
And, finally, this KB article includes a lot of additional information on the /3GB issue (with thanks to SG for the reminder!):
http://blogs.technet.com/sbs/archive/2006/06/30/439628.aspx
And now the new SBS BPA will tell you to remove any /3GB startup switches…