I am guessing it nuked the sdc partition table and left entire partitions entirely intact which could be recovered easily - by scanning for ext4 signatures - this is sufficiently dangerous - yes?
I don't have the output of the command - I was in a bit of a hurry and let the cmd run on terminal while I did other things, then came back, saw that it had completed and disconnected it, thinking it was done since SDC - I FORGOT that the .log file was involved and might have mislead the run - i just ran fdisk -l no partition table - yay! Maybe we could mark it with something specific like 'RMATHISDISKISTOAST' vs putting the string in a file and using that file - we could get a count of blocks/size nuked which would be more clear and