facility for mobile DDR RAM

john seth johnseth_2007 at yahoo.com
Sat Sep 27 04:52:07 UTC 2008

Hi Sir,
        Actually we are doing a project "Power management in RAM". For that, we want to know whether Partial Array Self Refresh (PASR) is implemented in software or not. We have read datasheets & we think that PASR is implemented at hardware level. The bank(s) which are not in use will be switched off (before that the data in that bank(s) will be moved to active bank). We are not getting such facility in mobile DDR RAM. 

--- On Fri, 9/26/08, Chuck Swiger <cswiger at mac.com> wrote:

From: Chuck Swiger <cswiger at mac.com>
Subject: Re: facility for mobile DDR RAM
To: johnseth_2007 at yahoo.com
Cc: freebsd-questions at freebsd.org
Date: Friday, September 26, 2008, 1:19 PM

On Sep 26, 2008, at 6:51 AM, john seth wrote:
>      I want to know whether there is facility for mobile DDR RAM, so  
> that we can switch of a bank(s) without loosing the data in other  
> bank(s)..

Swapping RAM without taking down the system is feature or capability  
of high-end hardware like Sun Enterprise xx00 and Tandem "non-stop"  
minis.  I don't know of any systems for under a ~6-figure price which  
has that...


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