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Low level format program for Model 4/III

A low level format from a PC’s controller wouldn’t help you much if you actually want to use it on a TRS-80, they will not be compatible. (Pretty sure the TRS-80 formats them with 256 byte sectors, among other problems.)
yes and no…yes they are not compatible formats…. But you can hook it up to a standard MFM controller and run things like DOS Debug or Spinrite etc to test the overall condition of the drive, identify bad tracks etc. I do that all the time. Sometimes they just need a good exercise run. Once you know you have a working drive, put it in the TRS-80 and reformat it.
 
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