einstein9 wrote:
Hello guys,,
For some time i was thinking about improving Reading Performance of drives with Weak heads (when you run out of donors)
and i came up with some results (not finished yet) still working on it with good & improving results (but not good enough to consider it as a final result)
It is always about the material being used and the % of the mixed liquids (which am trying to figure out here)
I did some tests and here is a sample recorded video of it where you will notice the Diff. in Temp. inside & outside the container.
https://youtu.be/PLaJXj8Teg0Am ready to share my experience with anyone who worked on this research and made some progress (hope better than what i did)
I think we will get to something @ the end.
Thank you
Sir ,
I would like to share my experience with you regarding this .
1 : The ultrasonic frequency also makes a great difference .I have seen some people say higher is better but i am sure they have really not tested it .One apprehensive thing i have in this cleaning approach is that ,The head thats suspended also does shake and could actually lead to a issue "but i am yet to see this happen " . The liquid does make a difference .Once i am done with my setup for platter cleaning which is underway i plan to make a custom CNCed tool so that i can get assistance while i am preforming this procedure .
2 : The weak performance could also be due to the fact that the platter surface is not not in the best condition .In this case cleaning the heads and installing and letting the system do a sweep butterfly test helps in platter cleaning and then taking same heads out and cleaning and repeating this few times really enhances the read/write performance .mostly if starting performance is degraded then platter are mostly 75% weak too and this method improves performance
3 : External temperature also makes a lot of difference while the task is running .I will give you a example ,Assuming we have a shrek LT drive with 4 platters and 8 heads and out of those 1 or 2 heads are really weak .So if you deselect this head and clone data of other heads and in the end you enable those 2 heads at this time the overall drive temperature is high and the same heads start behaving .In this no need to clean heads at all .
4 : Other then seagate i have had limited success tweaking rom parameters for heads .Seagate does have a Temperature adjustment feature as they call it and this does work ,But its not implemented in acelab tool which is a pity .I have had cases in seagate that have one head totally fail and i have used this tweak to read those heads and finish the case without head swap .You see these slim seagate hods mostly they are 1 platter and 2 heads and mostly 1 head is kaput .
5 : If you know the proper fiber to select ,The shape and number of a brush that you like to use for heads cleaning and also know the liquid you plan to use and your technique is good ,This approach yields better results then cleaning the heads in a ultrasonic .
PS : Regards to my senior .Just a few days back i used a special brush/liquid to clean a rosewood ST2000LM007 Top Platter Manually Although we are discussing about heads here and spend 7 hours under a microscope non stop .Result 100% data recovery from a platter that had enough metal dust spread all over the platter .I am now designing Lots of physical Data recovery tools that i plan to start selling in july and they will all be very very different from tools sold by brilliant people like hddsurgery "Lots of Love and regards to nikola sir for producing such class a products " .I am myself a user of his tools and will remain a user till like ,Tools will be to assist some of us in our physical work much different then thats being sold .I promise that this time no one will say do not buy "Made in India " Tool .All The Tools Will Be Metal And CNCed Using Ultrahigh End CNC Machines .Sometimes i feel that a thing is missing in almost all the tools i have used i hope to develop that small part also to assist us to handle those kinda tasks .I am also planning to develop some tools to help assist us in NAND Flash Work Also
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Regards
Amarbir S Dhillon , Chandigarh Data Recovery Labs [India]
Logical,Semi Physical And Physical Data Recovery
Website->
http://www.chandigarhdatarecovery.com