31 Oct
2010
31 Oct
'10
10:15 a.m.
On 30 Oct 2010 at 15:06, Steven Hirsch wrote:
All,
I'm trying to evaluate a pile of large MFM hard drives for
functionality. I'm attaching them to a WD-1006V-MM2 controller and
running Sprinrite 4 under DOS 6.0 (using a 486 EISA motherboard).
This works fine for drives with < 1024 cylinders, but I cannot seem to
remember (or figure out) how to surface-test drives with more
cylinders (e.g. Priam V185 with 1166).
The convention when the cylinder field overflows 10 bits is to use
the two high-order bits of the head field (that's why MFM, and for
that matter, IDE drives max out at 64 heads when non-LBA geometry is
used.).
--Chuck