29 Jan
2012
29 Jan
'12
3:10 p.m.
Jules Richardson wrote:
... unlike Acorn, where the DFS firmware would treat
separate disk
surfaces as completely different logical drives:
logical drive 0 = physical drive 1, top surface
logical drive 1 = physical drive 2, top surface
logical drive 2 = physical drive 1, bottom surface
logical drive 3 = physical drive 2, bottom surface
Access to logical drives 1 and 3 would give an error in a single-drive
system.
Not quite right, because upside down.
logical drive 0 = physical drive 1, bottom surface
logical drive 1 = physical drive 2, bottom surface
logical drive 2 = physical drive 1, top surface
logical drive 3 = physical drive 2, top surface
Remember a single-sided drive has the lower head but not the upper.
--
Pete Peter Turnbull
Network Manager
University of York