mediaman wrote:
this first bit was a joke.(platter swap)
sorry internet humor is a tough one for me because I try not to be insulting. If I laughed at it and you were serious you might have been offended. Additionally, there are very many cultures on here that react in different ways. So it was really out of respect and the attempt to maintain a good reputation on these sites. I promise I've got a sense of humor.
mediaman wrote:
just out of interest do you know why the lubricant is used? (question for magneto, I know the answer
I
understood it to be used to reduce the likelihood of damage from "Stiction" and other head-to-platter contact.
@Mediaman
My thought process for the need to re-lubricate the platters comes from the idea that I'm working with extremely dirty platters that could possibly lose the lubrication layer during the cleaning process. I don't know how many people have researched the effects of Isopropyl alcohol on the lubrication layer and it's state after being subjected to many chemicals and organic compounds. That's what I'm aiming for in the end. I don't want to recreate the wheel if someone has already studied these effects. Also, the effects of different types of water on the platter surfaces.
Daisy Woo wrote:
The lubrication layer is only in the parking zone and is a coating rather than a spray like WD40.
There is some info about the layers of a platter here.
http://www.mjmdatarecovery.co.uk/workin ... tters.htmlA good book about this and other hard disk technology (albeit somewhat dated now) is;
Magnetic Disk Drive Technology by Kanu G. Asher
Which is where the above website got their info (according to the credits)
Daisy
@ Daisy
Thanks for the info. I actually have that book here in-house but have not spent enough time reading the whole thing cover-to-cover. I've read through parts that were suggested. I will take additional time to read a little more. Can you tell me where you get the information about the lubrication layer only being in the landing zone? When I did read the site you suggested I didn't come away with the idea that the lubrication layer was only in the landing zone. It did specifically mention that it helps there but not that it was only there.
"# Lubrication Layer The last layer is an organic polymer lubricant material to minimize head-to-platter contact friction. When the heads park on the platters, it is this layer that prevents excessive wear to the heads as they take-off and land"
I take from this (and I know it's just one source of information) that it is completely covering the platter but specifically helps in the landing zone. I got on here to get rid of any of my assumptions and replace them with facts in this area, so by all means if there is a reputable source that clearly states this, please share! Also please forgive me. My intention is not to troubleshoot you or put your knowledge into question but anyone can join a forum. If we just listened to what everyone said then a lot of us would be using hard drive spray.
I like to find out where people are getting their information.
Thanks for everyone's input so far. I appreciate all the suggestions and sharing of information.