31 Oct
2010
31 Oct
'10
1:03 p.m.
On Sun, 31 Oct 2010, Chuck Guzis wrote:
On 30 Oct 2010 at 15:06, Steven Hirsch wrote:
Ok, but I still need to know the procedure and appropriate utility to
surface-test the drives. The mapping you describe appears to be a
low-level notion that is not mapped to anything in DOS fdisk and/or
Spinrite.
Steve
--
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.).