Re: wd800jd-75msa3 head swap
November 24th, 2015, 14:40
This model only interesting in cases when original heads are working, but can't read one of two surfaces (if hdd has 2 heads). And you can try any matching DCM heads and try any lid adjustments - it doesn't help to read bad surface - head just clicking.
Pepe opinion is servo gone, so there is no way how to read data. I thought same thing, until I got two cases where I was able to read some data by about 70th tried set of heads.
If you are talking about just bad heads and you were able to read data by 1st-5th set of heads - it's not case what I am talking about.
PS I can change only one head on seagate DM set of heads and it will work, so believe me I can find out where just bad or incompatible head and where something more complicated than that.
Pepe opinion is servo gone, so there is no way how to read data. I thought same thing, until I got two cases where I was able to read some data by about 70th tried set of heads.
If you are talking about just bad heads and you were able to read data by 1st-5th set of heads - it's not case what I am talking about.
PS I can change only one head on seagate DM set of heads and it will work, so believe me I can find out where just bad or incompatible head and where something more complicated than that.
Re: wd800jd-75msa3 head swap
November 25th, 2015, 13:57
drHdd, in reply to my question if u were able to clone such drive 100% you wrote:
so i think there WAS servo damage OR the above mentioned PCB issues played their role sometimes, don't you think?
It is only 50% true, if the servo is gone, it affects mostly the inner half of the platter, the outer areas might survive. It poses a second problem: how to read that first half
(solved of course)
As for DM series, I love them because everybody hates them Hotswap rulez... there are absolutely no MHA compatibility problems either... Hey, what is MHA compatibility anyway?
Jono: most recent boards use thinner traces than the 1335 used, trace width is not a major issue in this situation, whoever might have told you that.
i never said lid alignment is not working, i said there are other, more exact ways to get around the problem. The same is true for using 10+ donor heads. It probably works, but time consuming.
These are the most used methods, however if u ask people WHY and HOW they work, very few will be able to tell you the reason.
pepe
drHDD wrote:No, they didn't read whole surface. Time to time drive was start clicking.
so i think there WAS servo damage OR the above mentioned PCB issues played their role sometimes, don't you think?
Pepe opinion is servo gone, so there is no way how to read data.
It is only 50% true, if the servo is gone, it affects mostly the inner half of the platter, the outer areas might survive. It poses a second problem: how to read that first half
(solved of course)As for DM series, I love them because everybody hates them
Hotswap rulez... there are absolutely no MHA compatibility problems either... Hey, what is MHA compatibility anyway? Jono: most recent boards use thinner traces than the 1335 used, trace width is not a major issue in this situation, whoever might have told you that.
i never said lid alignment is not working, i said there are other, more exact ways to get around the problem. The same is true for using 10+ donor heads. It probably works, but time consuming.
These are the most used methods, however if u ask people WHY and HOW they work, very few will be able to tell you the reason.
pepe
Re: wd800jd-75msa3 head swap
November 25th, 2015, 14:47
Okay, next time, I will send similar case to you. It's better than play with 70th head sets. Of course if price will be reasonable.
Powered by phpBB © phpBB Group.