Large geometry MFM drive testing
cclist at sydex.com
Sun Oct 31 12:15:01 CDT 2010
On 30 Oct 2010 at 15:06, Steven Hirsch wrote:
> 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
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