Hi Don,There were quite a few changes in NETMF 4.3 but I'm not aware of any that would cause this. If you run your code under NETMF 4.2, does it work?

Also--if you can create a consistent repro--for either 4.2 RTM or 4.3 beta--we will try to repro it here and dig into the problem.

Chris

Chris - As a side note, it does appear that some other users are having similar issues with SD Cards and NP2.

Thanks!

Don

Hi Don, The best place to starting diagnosing an issue like this is with a different MicroSD card. Preferably a <=2GB one, to isolate any SDHC issues. And first formatted using a PC. Do you happen to have another MicroSD card there? Chris

Hi Chris - I do not. All I have is a couple of 4GB cards. I am however willing to aquire an additional 2GB to test. Can you give me a manufacturer and model # of a card that you currently have working with the NP2? A link would be helpful.

Thanks!

Don

Hi Don,There were quite a few changes in NETMF 4.3 but I'm not aware of any that would cause this. If you run your code under NETMF 4.2, does it work? Also--if you can create a consistent repro--for either 4.2 RTM or 4.3 beta--we will try to repro it here and dig into the problem. Chris

Hi Chris - Sorry this has taken a while but just got back to this today. I uninstalled all v4.3 software and installed v4.2 of the .NETMF and Netduino SDK. I erased and installed the v4.2.2 firmware on my NP2 and my NP has v4.2.0.1.

The same behavior happened as described above with my NP2 and corrupt files. The NP works like a champ so I am led to believe that there is an issue with my NP2? I am not sure where to begin figuring out what that might be.

If you have any suggestions of things I can provide to help solve this or other things I can try please let me know.

Thanks!

Don

Hi Don,

Here's what we use:
http://www.amazon.co...sk 2gb micro sd

SanDisk 2GB MicroSD. They've worked 100% for us, and are what we use to test every Netduino Plus 2 before it leaves Secret Labs.

Chris

Thanks Chris. I have ordered it and will report back the results. Quick question, I usually just format with a PC and do Fat file system w/ default allocation sizes. Is there any steps that you all take differently to format?

Thanks!

Don

Hi Don,

Here's what we use:
http://www.amazon.co...sk 2gb micro sd

SanDisk 2GB MicroSD. They've worked 100% for us, and are what we use to test every Netduino Plus 2 before it leaves Secret Labs.

Chris

Hi Chris - I received the new SD card and have the same results as before. ND1 works great and ND2 fails with a corrupt file. Any thoughts on next steps?

Thanks!

Don