what format do you want?
If its Amiga, I'd suggest this to be sure that diskettes are not faulty:
1) ERASE with x-copy
2) format with D-copy using SAFE check and 1 trys. (if it gives just a single track error and there are is no visible da mage you might want a second pass)
if you want bootable disk, x-copy newer version gives you various options, and d-copy IIRC installs standard DOS bootblock. but the safest would be to use 'install' command in CLI.
all this is for OFS.