I had fdisk segfault and just wondered if anyone had any other options?
EDIT: It was late and that was a dumb question. Good answer though!
fdisk is for partitioning drives. To format a drive, you would use the mkfs command. You need to specify the filesystem type using the -t option. I believe the default is ext2. The mkfs man page will explain more.
# mkfs -t vfat /dev/sda1