-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Friday, 2013-08-16 at 16:00 -0400, Greg Freemyer wrote:
On Thu, Aug 15, 2013 at 6:46 PM, Carlos E. R. <> wrote:
If the platter has 2" and something usefull surface radius, thats about .5·10⁶ tracks per platter side, which is even more than the number you said, so you are about right and I wasn't.
A 3 1/2 inch across drive with a 2 inch useful radius. Where do you buy your drives? I need some of those!
I'm not used to calculate in inches. The disk bay is 5¼, so I halved that minus a bit, so I thought that 2" would be the approximate radius. I did not remember that hard disks are labeled as 3.5", lot smaller than the bay - if it were centimeters it would mean something to me. A number in inches is just a number to me, has no meaning. :-}
Seriously, I'd say a desktop 3 1/2 inch drive only has about 1 inch of useful radius. There's dead space in the middle that is about 1 inch in diameter (1/2" radius) and at least an 1/4th of an inch dead at the edge between the chassis / air / unused platter edge.
fyi: I don't have a dead / disassembled drive handy to actually measure so I'm going from memory.
Me neither... The only disks totally broken I have are two laptop units. Actually 1 disk... Perhaps I have a 3.5" somewhere. Some people made wall clocks with them :-) - -- Cheers, Carlos E. R. (from 12.3 x86_64 "Dartmouth" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.19 (GNU/Linux) iEYEARECAAYFAlIOmX0ACgkQtTMYHG2NR9UaBACeIDIC2XshZm8dqsOlpbtG5xve N3gAnRw5JOGKQcMIBfKl1AFuD7KJ102V =qxWd -----END PGP SIGNATURE-----