Quaxo's original question was on usability.
The easiest way I've found to manage USB sticks is to start with fdisk(8). This is because when you "format" sticks on Windows, you get an MBR. That MBR does not have an A6 partition.
This example dedicates a stick to OpenBSD, and mounts it at /mnt:
- Insert stick. Assuming "sd0" assigned, change commands below if a different SCSI device number assigned.
- # fdisk -iy sd0
- # printf "a\n\n\n\n\nw\nq\n\n" | disklabel -E sd0
- # newfs sd0a
- # mount -o softdep,noatime /dev/sd0a /mnt