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SubjectRe: UDMA problems
Richard Fish <> wrote:
> Charles Cazabon wrote:
> > Nextmost likely is poor quality IDE cable, or too-long cable. UDMA specs a
> > shorter maximum cable length than plain old vanilla IDE. I can't remember
> > the maximum allowed length off the top of my head, but in the shops I've
> > worked at, we tried to limit IDE cable runs to 18 inches for UDMA drives.
> For our Seagate Medalist Pro 7200rpm drives, 18-inch cables will corrupt
> the filesystem. The longest cable I've been able to use successfully
> with these is a 14-inch.

I've had some trouble finding the official spec, but I think I now recall
it as being 16 inch maximum -- 14 inches is close enough to that after allowing
for extra cable capacitance and whatnot.

Sigh. Why can't the industry finally admit ATA/IDE/etc is a kludge and
switch to SCSI?

Charles Cazabon
Charles Cazabon <>
Any opinions expressed are just that -- my opinions.

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