TRS-80 floppy

Frustrated trying to do something seemingly easy…create a blank TRS-80 floppy! Tried creating each type JV1,JV3 or DMK using both mkdisk in xtrs and built-in menu in sdltrs.
But always get some type of error when trying to write. Finally resorted to copying an existing disk and deleting most of what’s on there. Which brings me to problem #2…how do I delete everything on a disk?
Tried formatting it…also fails…DISKETTE UNUSABLE! HARD-SECTORED!!