why are hard drive platters reflective?

[yawnmoth]

The head doing the reading doesn't care if the platters of a hard
drive are reflective, so why are they? I assume it's just a
consequence of the way they're made, but how, exactly, is it a
consequence?

 

[Michael A. Terrell]

The head doing the reading doesn't care if the platters of a hard
drive are reflective, so why are they? I assume it's just a
consequence of the way they're made, but how, exactly, is it a
consequence?

They have to be polished to reduce air turbulence, and maintain a
very critical flying height over the surface. How would you do this and
have a non reflective surface?


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Lord Garth]

They have to be polished to reduce air turbulence, and maintain a
very critical flying height over the surface. How would you do this and
have a non reflective surface?

Well, that took the fun out of the question! Wouldn't it be more
entertaining
getting into wavelength and electron orbital?

Did you ever see one explanation for why glass is transparent? The
answer boiled down to, "there is no reason it shouldn't be". Huh?

 

[craigm]

They have to be polished to reduce air turbulence, and maintain a
very critical flying height over the surface. How would you do this and
have a non reflective surface?

But you can fly heads on a glass disk which is transparent.

The disk surface is nickel, cobalt and chromium.

 

[Michael A. Terrell]

But you can fly heads on a glass disk which is transparent.

The disk surface is nickel, cobalt and chromium.

Have you ever seen magnetic glass?


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[Michael A. Terrell]

Well, that took the fun out of the question! Wouldn't it be more
entertaining
getting into wavelength and electron orbital?

Did you ever see one explanation for why glass is transparent? The
answer boiled down to, "there is no reason it shouldn't be". Huh?

I'm tired of beating around the bush, so I tuned up the bush hog.
Looks like poor little Ferdie was in the way when I fired it up on SED!
;-)


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[craigm]

Have you ever seen magnetic glass?

Glass disks are used for fly height analysis.

 

[Jasen Betts]

The head doing the reading doesn't care if the platters of a hard
drive are reflective, so why are they?

because they are very flat, and the coating is very thin.


Bye.
Jasen

 

[Michael A. Terrell]

Glass disks are used for fly height analysis.

Glass disks are metalized to make them magnetic and used in new, high
RPM hard drives.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

 

[craigm]

Glass disks are metalized to make them magnetic and used in new, high
RPM hard drives.

My point was the reflective nature of disks is due to the surface materials,
not the flatness.

 

[Michael A. Terrell]

My point was the reflective nature of disks is due to the surface materials,
not the flatness.

Proof?


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida