how to use only lower track (head 0)

[hwrdmltn]

I have need to just use lower track as the drives are single sided only, is there a setting in the configuration file to cause it to use head 0 only?

Also reading the same disk from a known good drive at the same location (TK0, HD0) does not seem to produce consistent results.the buffer is different each time.

Thanks

W1ARQ  Howard