SD Cards causing Windows CE device to hang

I have a Windows CE device which runs an application off of an SD Card. I have two SD Cards, one is a SanDisk Extreme III 2 GB SD Card, while the other is a Kingston 2GB SD Card. The only difference between the two cards, spec wise, appears to be that the SanDisk supports Flash Erase, while the Kingston doesn't.

After about 36 hours, about 30% of the devices running with the Kingston card will "hang" and I'll have to pop the SD Card out and back in to bring the device back to life. Not only does the application hang, the entire OS hangs. However, the ones with the SanDisk do not hang.

I did a benchmarking, and the SanDisk card has a much faster write speed when passing small sized data (the primary type of data I'm passing with the application I'm running). However, when there is a larger size of the data being written, they write at about the same speed.

Does anyone know why this might happen?

 

it may be a factory defect, or you could try taking off all the data on the card and re-formatting the sd card then putting the data back on

hope this helps

 

sd cards can be class 2, 4 or 6 and even within the classes there are differences in transfer speeds.
Here's a chart listing some specs
http://en.wikipedia.org/wiki/Secure_Digital_card#Speeds