Comments on: 32 into 64 http://fyzzi.wordpress.com/2008/07/03/32-into-64/ izzy's procrastination Fri, 03 Jul 2009 00:11:06 +0000 http://wordpress.com/ hourly 1 By: wyzzi http://fyzzi.wordpress.com/2008/07/03/32-into-64/#comment-24 wyzzi Sat, 09 Aug 2008 05:44:15 +0000 http://fyzzi.wordpress.com/?p=35#comment-24 :) hi Rolly!!! i have been blogging for a while (under different locations), but i thought of formalizing things and having a human face to ibm technology (although i try to blog not just on ibm but all technology i find interesting in general and in an unbiased way) i have short bursts of blurbs at http://twitter.com/wizzy if you are inclined that way. thanks for the comment, as always your insight is brilliant. hope to see you at the Forum! I'll be there all day. :) hi Rolly!!!

i have been blogging for a while (under different locations), but i thought of formalizing things and having a human face to ibm technology (although i try to blog not just on ibm but all technology i find interesting in general and in an unbiased way)

i have short bursts of blurbs at http://twitter.com/wizzy if you are inclined that way.

thanks for the comment, as always your insight is brilliant.
hope to see you at the Forum! I’ll be there all day.

]]> By: Rolly http://fyzzi.wordpress.com/2008/07/03/32-into-64/#comment-23 Rolly Sat, 02 Aug 2008 10:43:06 +0000 http://fyzzi.wordpress.com/?p=35#comment-23 Belated comment, but I've only just found your blog Izzy ! (Hopefully by now), most server manufacturers have actually implemented "hacks" to help with the recovering the lost memory when running 32bit OS's. For example, using Windows 2003 standard, 32 bit, on a server with 4Gb RAM, you'll end up with with 3.5Gb ish (I've actually seen as little as 2.8Gb !). Both IBM and HP (at least) introduced BIOS features, which when used with the above combination and the /PAE switch, will move the lost RAM above the 4Gb boundry, and make it accessible to the OS again. Good stuff ! Check the <a href="https://www-304.ibm.com/systems/support/supportsite.wss/docdisplay?lndocid=MIGR-62840&brandind=5000008" rel="nofollow">HS20 BIOS</a> for an example of such hacks: "Fix to improve allocation of the memory required by PCI devices so that more memory is available as usable system memory with 4GB of physical memory installed. For OS kernels that can support PAE(Physical Address Extension) mode and the mode is enabled by the customer this is a non-issue" Belated comment, but I’ve only just found your blog Izzy !
(Hopefully by now), most server manufacturers have actually implemented “hacks” to help with the recovering the lost memory when running 32bit OS’s.

For example, using Windows 2003 standard, 32 bit, on a server with 4Gb RAM, you’ll end up with with 3.5Gb ish (I’ve actually seen as little as 2.8Gb !). Both IBM and HP (at least) introduced BIOS features, which when used with the above combination and the /PAE switch, will move the lost RAM above the 4Gb boundry, and make it accessible to the OS again. Good stuff !

Check the HS20 BIOS for an example of such hacks:

“Fix to improve allocation of the memory required by PCI devices so that more memory is available as usable system memory with 4GB of physical memory installed. For OS kernels that can support PAE(Physical Address Extension) mode and the mode is enabled by the customer this is a non-issue”

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