3 Aug
2014
3 Aug
'14
10:58 p.m.
On 08/03/2014 10:24 PM, Eric Smith wrote:
On Sun, Aug 3, 2014 at 10:29 PM, dwight <dkelvey at
hotmail.com> wrote:
Assuming that you could keep the correct clearance, I imagine that a
moder GMR head might do the trick. The gotcha, of course, is
"maintaining correct clearance".
I'd heard about 3M using a colloidal iron suspension (e.g. visamag,
magnasee, kyread) and scanning the disk surface with a laser.
I imagine that a setup using a CD read head might do the trick, but I
doubt that the work that went into the setup would pay for itself.
--Chuck
Although, not the easiest thing to do, there is a
way to
read the disk without causing the damage that heads can do.
The bit are possible to be read optically. One uses a material
like used for magnaflux.
Is there any way to use the Faraday effect to read a magnetic disk optically?