AIX 5.2 can be run in 32 and 64-bit mode.

64-bit kernel mode should have better performance on bulk I/O, larger
memory model, etc.

This is definitely worth if if you are using ultra 160 or 320 adapters,
or 64-bit Fibre channel (6228 and 6239) cards.

I would think that for an M80, any LPAR capable system, any 7017 system,
Winterhawk and Nighthawk SP nodes, and similar class machines would
greatly benefit from 64-bit.

If your system only has 32-bit PCI adapters, there wouldn't be much
benefit in 64-bit kernel mode.

---
Josh Davis

On 04.03.22 at 15:41 Eric-van.Loon AT KLM DOT COM wrote:

> Date: Mon, 22 Mar 2004 15:41:58 +0100
> From: "Loon, E.J. van - SPLXM" <Eric-van.Loon AT KLM DOT COM>
> Reply-To: "ADSM: Dist Stor Manager" <ADSM-L AT VM.MARIST DOT EDU>
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: Advantages / Disadvantage running in 64 bit mode
>
> Hi James!
> Please correct me if I'm wrong, but as far as I know, you can run AIX
> 5.2 in 32-bit mode. TSM 5.2.2 has both a 32-bit and a 64-bit mode RTE...
> Kindest regards,
> Eric van Loon
> KLM Royal Dutch Airlines
>
>
> -----Original Message-----
> From: James Lepre [mailto:jlepre AT NECA DOT ORG]
> Sent: Monday, March 22, 2004 15:17
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: Re: Advantages / Disadvantage running in 64 bit mode
>
>
> You must run in 64bit mode, you do not have a choice with aix 5.2