RK05 question

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Mon Jul 12 23:27:18 2004

> I guess there is more to an LLF (Low Level Format) than
> I realized. I had thought that a completely blank RK05 media
> was able to be FORMATed via an RK05 drive. Your answer

It can

> seems to STRONGLY suggest that the media must first be
> SECTORed correctly.

These packs are _hard_ sectored. There's a ring round the hub with
notches in it -- <n> equally spaced ones for the sector pulses, and an
extra one, halfway bettween 2 of the sector notches, for the index pulse.
It's that ring that's different between the 12 sector (PDP11) and 16
sector (PDP8) packs.

-tony
Received on Mon Jul 12 2004 - 23:27:18 BST