File systems on SD memory devices

[ali nasir]

Hello,


What file systems are appropriate to these devices? 

    ---If you want these cards to be written or read from a standard desktop PC also, then any of the FAT will be the most appropriate for the card.

What are the pros and cons?  
    --Pros and cons for using the card??I did not underatand this concern of yours.


We don't want to infringe on anyone's patents, so probably FAT is out, right?  
    --I have no idea of any licensing issues. But the SD cards from the market already come formatted with the FAT. Hence i guess the licensing issues might already have been sorted out. But i am not sure


Does RTEMS already support something appropriate?  
    - Yes. RTEMS support MSFAT32, MSFAT16, Rtems File System (RFS). The RFS is mainly recommended to have a Filesystem within the embedded target itself like a filesystem on RAM or Flash device.


If not, is it something we should work toward contributing?
  
It would be nice if the format is supported by Linux, MacOS and/or Windows, but not strictly required.
    --FAT is already supportd i guess by Linux, MAC OS and windows.

Regards,
Ali


________________________________
 From: "Claus, Ric" <claus at slac.stanford.edu>
To: "rtems-users at rtems.org List" <rtems-users at rtems.org> 
Sent: Friday, June 8, 2012 10:49 AM
Subject: File systems on SD memory devices
 
Our RTEMS-based project will use micro-SD memory devices to store boot and application images, as well as configuration information files.  I am charged with interfacing the hardware to our software, possibly via RTEMS.  This is new territory for me, so I am wondering whether people in the community would share their wisdom with me.

What file systems are appropriate to these devices?  

What are the pros and cons?  

We don't want to infringe on anyone's patents, so probably FAT is out, right?  

Does RTEMS already support something appropriate?  

If not, is it something we should work toward contributing?

It would be nice if the format is supported by Linux, MacOS and/or Windows, but not strictly required.

Thanks for any advice you can give me.

    Cheers,
            Ric
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