Which tools do you use to check scratches on the platters?

[data recovery lab]

Hello everyone..
I started a new data recovery lab
& I have a few questions


https://drive.google.com/folderview?id= ... sp=sharing

By the image, Will probably have scratches?

&

If there are scratches between the platters

(On the platters from the inside)
How can I check it without spend money a new donor drive?
(I can not separate the platters, they must be aligned with each other. Right?)


I have a stereo microscope and is standing in the area of the soldering, and I can not move it.
So I want to buy a another digital microscope to take pictures of
platters and heads in a clean room
Does someone know if it can do the job? Or is it junk?

http://www.ebay.com/itm/311236961973?_t ... EBIDX%3AIT

And what do you recommend?

Which tools do you use to check scratches on the pallets & make picture of the platters?
(Because it's like a mirror
There is a difficulty to make a picture)


Thanks.

Attachments

[HaQue]

I am no expert, but looks like a head problem...

[data recovery lab]

There is a problem with the read heads, it is clear..
The point is
That are likely to have a scratch on the surface as a result of the defective head
my question is
How do I check the inner side
Without spending money for the donor drive
Or to separate the platters

[Doomer]

I am no expert, but looks like a head problem...

That must be a real headache

[Doomer]

How do I check the inner side

check the heads for dust

[Martin]

1) Strange sounds.
2) Dust on the filters and inside enclosure.
3) Dust on the heads (most useful indication).
4) Using signal/spectrum analyzer (good professional skills are required)