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.

Application : PCB Rev. 1,2 Jumper Location

JP164 (pin 9-10)
Function	Soft Sector	Hard Sector

Application : PCB Rev. 3 or more Jumper Location

JP162 (pin 9-10)
Function	Soft Sector	Hard Sector

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

Fig. 2-8 Jumper Setting for Hard Sector/Soft Sector Selection (SZ905)