I've seen that illustration in an Atari ST programmer's manual!
On Thu, 2005-02-03 at 10:19 -0500, Ashley Carder wrote:
> > Jay> Wonder what the head-disk gap was on a drive of the IBM 1311
> > Jay> vintage.
> >
> > Probably not dramatically larger than that of the RK05. I don't
> > remember the number. It was shown on a drawing on the disk pack bags
> > that DEC created to remind people not to put fingerprints on the
> > platters. I remember it showed a fingerprint, a dust particle, and a
> > hair, drawn to scale next to the head height. The fingerprint was
> > about 3-5x the flying height, so measure a fingerprint and find
> > out... It also was perhaps 1/50th of a hair. So perhaps a few
> > micrometers?
> >
> > paul
>
> I knew I had seen the same diagram, so I looked in my RK05 manual
> and found the picture, which shows the following:
>
> Head flying height: 100 microinches
> Smoke particle thickness : 250 microinches
> Fingerprint smudge: looks about 2x the size of a smoke particle
> Lint and dust: looks about 2/3 the thickness of a hair
> Hair : 4/1000 of an inch
>
> Reference : Page 1-17 of the RK05/RK05J/RK05F maint. manual
>
> Ashley
>
--
Tore S Bekkedal <toresbe_at_ifi.uio.no>
Received on Fri Feb 11 2005 - 18:37:04 GMT