Dynamic mode format

What I tried

A known-good ST-251 this time. Back into G=C800:5, dynamic configuration, 820 6 821 821 11 7. That’s 820 cylinders, 6 heads, reduced write current and precomp starting at cylinder 821, 11-bit error burst, step rate select 7. Interleave 5 first, then reformatted at 3. Then FDISK, then FORMAT C: /S, then DOS 5. All with the Inboard 386 in.

What I measured

FDISK showed the full drive. DOS 5 installed and the 5271 boots from C:.

What broke or surprised me

Nothing this time.

Next

Same on the 5160.