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 Post subject: HGST recovery success rate
PostPosted: April 13th, 2017, 7:19 
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Joined: March 9th, 2017, 6:16
Posts: 67
Location: trinidad
I would like to know what is overall success rate for HGST Z7K500-500 HTS725050A7E630 head transplant.
I have very poor success rate & for unknown reasons head transplant fails.
I know ultimate success depends upon individual skills , tools and platter condition ,but in this case disk was making higher pitch clicking ,even after head transplant from healthy donor , disk tends to make same noise and stays busy.
There was no visible scratches on upper platter .
Is this due to high RPM ? What is all of your experience for this model. I want to know where I am wrong and how can I improve.


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 Post subject: Re: HGST recovery success rate
PostPosted: April 13th, 2017, 8:13 
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Joined: February 9th, 2009, 16:13
Posts: 1905
Location: Ontario, Canada
We usually get most of them, but having PC3K makes a huge difference in that.

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Luke
RAID Data Recovery


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 Post subject: Re: HGST recovery success rate
PostPosted: April 13th, 2017, 10:01 
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Joined: August 18th, 2010, 17:35
Posts: 3057
Location: Massachusetts, USA
@bunty
Test your technique on two working drives, not a damaged one. Then you will know if the technique is right or not.
Often, media damage on Hitachi is on lower surfaces, not top.

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 Post subject: Re: HGST recovery success rate
PostPosted: April 13th, 2017, 12:33 
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Joined: February 9th, 2009, 16:13
Posts: 1905
Location: Ontario, Canada
Got one in right now...heads are still alive. There is a lot of media damage with both heads in first 20% of the drive, but as we get to higher LBAs, both heads read fine. It is Mac encrypted, making it a little more essential to get the best clone possible.

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Luke
RAID Data Recovery


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 Post subject: Re: HGST recovery success rate
PostPosted: April 13th, 2017, 17:11 
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Joined: December 16th, 2015, 12:37
Posts: 71
Location: Qatar
Hi,
HGST has very weak platters , for me i have bad rate in Hitschi 2.5 ...
you have to check the original heads .. is its bint means it eill eat all the heads u will replsce later..

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 Post subject: Re: HGST recovery success rate
PostPosted: April 13th, 2017, 18:55 
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Joined: February 9th, 2009, 16:13
Posts: 1905
Location: Ontario, Canada
Z7K320-320 also arrived today. Head 0 read 100% and head 1 is dead. Will likely get a full clone after a head change next week.

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Luke
RAID Data Recovery


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 Post subject: Re: HGST recovery success rate
PostPosted: April 14th, 2017, 0:15 
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Joined: March 9th, 2017, 6:16
Posts: 67
Location: trinidad
Hi guys
Thanks for sharing your experiences.
originally disk was making loud noise , after head swap there is no change in symptoms.
There was no visible damage to top platters. Unfortunately if heads put back in donor , donor has lost detection and it also stays busy. (no clicking noise comes)
patient has damaged donor heads. I will have to purchase new donor now.
My worry is even second set get damaged , there will be big loss. Customer is not going to pay cost of donors :(


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 Post subject: Re: HGST recovery success rate
PostPosted: April 15th, 2017, 15:11 
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Joined: March 19th, 2015, 15:01
Posts: 1258
Location: isreal
Maybe the approach you using of replacing the HSA is wrong
In order to check it, you'll have to practice to replace a HSA from one "good working" drive to another "good working" drive


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 Post subject: Re: HGST recovery success rate
PostPosted: April 17th, 2017, 1:25 
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Joined: October 5th, 2015, 18:53
Posts: 395
Location: Canada
If drive has media damage, heads should die. If heads are still working - it's not media damage.


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 Post subject: Re: HGST recovery success rate
PostPosted: July 12th, 2017, 0:09 
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Joined: July 12th, 2017, 0:06
Posts: 1
Location: America
I think it cause by high RPM.


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 Post subject: Re: HGST recovery success rate
PostPosted: July 12th, 2017, 5:26 
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Joined: October 24th, 2014, 4:57
Posts: 195
Location: Remote Raid Help on planet Earth
Good drives for data recovery. Only lost original PCB could make a headache.

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