Dirty platter. Teflon depositing ? How to clean it ?

[yan1982]

Hello,

We've a hdd with very dirty platter. It seems that it's teflon deposit, not ?
What do you think about ultrasonic bath to clean platter ? Do you know some ultrasonic bath system ?
What do you think about 3M IPA product to clean platter ?

You find in attachment pictures of the platter.
What do you think about this ?

Thank you in advance for your answer.

[drc]

Looks like someone got some crud on the platters and subsequently turned on the drive.

[DR-Kiev]

Use a clean distilled water (without any additives), it absorbs all dirt.

[ppumkin]

Would Reverse Osmosis water do the same as Distilled?

[yan1982]

We work in bath solution ultrasound. Have you experienced this kind of solution ?
Our main problem is to clean the invisible faces of the platter.
We think to clean each platter individually but we will have probably misalignement problems, not ?
How to keep the alignement of platter if we clean individually each platter ?

Please, somebody have solution, please PM me.

[drc]

I don't think that's depositing. It looks like scratches to me, caused by the heads traveling over the dried spots of whatever-that-is at high speeds. Have you verified that you can actually remove any of it?

[yan1982]

Yes, we can clean on the first platter but we don't see the other side but we think this is dirty too.
So, this is the reason, we search some solutions to clean other invisibles sides by ultrasound for example or vibrations.

[DR-Kiev]

Would Reverse Osmosis water do the same as Distilled?

As far as i know Would Reverse Osmosis water is almost cleared too , but I would first test it ( pour it into a clean platter, waited when its dry, and looked left a dirt)

[DR-Kiev]

We think to clean each platter individually but we will have probably misalignement problems, not ?

What name of your hdd ?

[yan1982]

It's a Hitachi HTS541616J9SA00

[Alexii]

Thats just dirt imo. Smbd cleaned the platters with alcohol or smth NOT in a clean room environment. Cause of that the alcohol evaporated and left dirt that fell on it during the application. From the looks of some of those dirt streaks - the drive was powered on after.

[guru]

yep someone caused more trouble. Good luck