*this is not the answer , i just need some info. I will delete this immediately*

what is the size of "Something" that you are trying to copy ?. is this /Volumes/Something and /dev/disk2 is on the same 32 gb drive ?. To my understanding if this /dev/disk2 is in fat32 format and what you are trying to copy is a single file more than 4GB of size , then its not going to get copied.