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SD Card Fails to mount


#1

I currently use a SanDisk Ultra 4GB SD Card (class 4 - up to 15 MB/s) for my application and it works fine. I recently tried to use a SanDisk Ultra 8 GB SD Card (class 6 - up to 20 MB/s) and the application now fails every time with the following error. I tried another 8 GB class SD card by Wintec and it worked fine. Would it be due to the high speed rating of the SanDisk Ultra 8 GB SD card? This is a production application so I was just trying to go with the highest possible quality (and quickest) SD card without breaking the bank.

#### Exception System.Exception - 0xffffffff (1) ####
#### Message: 
#### GHIElectronics.NETMF.IO.PersistentStorage::.ctor [IP: 0000] ####
#### SPSMicro2.CoreLib.SPSMicroApp::MountFileSystem [IP: 000e] ####
#### SPSMicro2.CoreLib.SPSMicroApp::Initialize [IP: 002d] ####
#### SPSMicro2.MicroUI.Program::Main [IP: 0039] ####

A first chance exception of type ‘System.Exception’ occurred in GHIElectronics.NETMF.IO.dll
The program ‘[6] Micro Framework application: Managed’ has exited with code 0 (0x0).


#2

Which board are you using?


#3

ChipworkX and the FEZ Mammoth mainboard.


#4

If really need that card, we can check to see if we can improve the driver for you. Shoot me an email if interested.