mkfs.msdos sdcard cannot be used on s4

[Android Question]

After running mkfs.msdos on a 16G sdcard, the card does not work in an S4 phone.
The phone goes into a reboot loop.
logcat displays the following message just before the first reboot:
MDM :: sdCardWriteAccessBlocked 0

The same card works fine in an I9000 phone.

The mkfs.msdos is run on Ubuntu Linux.

 

[Rukbat]

Try mkfs.vfat

There are differences between an MSDOS filesystem and a FAT32 filesystem. Some phones may ignore the differences, some may not. But Android specifies a FAT32 fs, so why give it a different one?