The drive with Hard Sector mode issues SECTOR CLOCK on J1-pin16 and J2-pin2, and with Soft Sector mode does ADDRESS MARK FOUND-N on J1-pin16 and J2-pin2. "Set Configuration" command takes precedence over this Jumper Setting function.

JP285 (pin 9-10)
Function	Soft Sector	Hard Sector

* A drive as shipped is set as "Hard Sector" mode