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 Post subject: HTS541010A7E630
PostPosted: March 14th, 2017, 14:38 
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Joined: February 18th, 2009, 8:08
Posts: 229
Location: Manchester, UK
Hello all,

I've run out of options for a HTS541010A7E630. Suggestions are very welcome on this one.

It follows my previous post in respect to tools available for these new Hitachi thin HDDs at:
http://forum.hddguru.com/viewtopic.php?f=7&t=35109

The head assembly was swapped. The patient remained unresponsive and made a lot of clicking noise. It would occasionally get to RDY after a few minutes, but would provide ABR errors. Use of "HDD initialization using stored resources" to then attempt to access firmware modules gave UNC errors and "DE AD", but it was possible to hear the heads tracking and making read attempts particularly when reading from head 1.

The donor heads were placed back into the donor - they worked perfectly. Still reading at 100Mb/s (credit to data-medics for his suggestion for a makeshift head comb for this).

Three options:
Donor part incompatibility
Degraded media / SA
Incorrect calibration / fitting of donor heads to patient

Any others?

Below I've taken a picture of the drive labels removed from the lid of each disk. I ordered the donor from overseas as this was about as good a match I could ask for. Unlikely donor part incompatibility?

Attachment:
DSCF2705 - Copy.JPG
DSCF2705 - Copy.JPG [ 528.62 KiB | Viewed 1202 times ]

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 Post subject: Re: HTS541010A7E630
PostPosted: March 15th, 2017, 13:22 
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Joined: October 5th, 2015, 18:53
Posts: 395
Location: Canada
bad sectors in sa due to adaptives shifting or something else.


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 Post subject: Re: HTS541010A7E630
PostPosted: March 15th, 2017, 16:12 
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Joined: February 18th, 2009, 8:08
Posts: 229
Location: Manchester, UK
Case solved - the patient HDD has highly degraded media / SA. Use of the patient heads in the donor allowed the donor to initialise and the heads read well.

Frustrating for this job, but good to know that success can be had in swapping the heads on these new slimline drives.

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 Post subject: Re: HTS541010A7E630
PostPosted: March 15th, 2017, 18:05 
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Joined: October 5th, 2015, 18:53
Posts: 395
Location: Canada
What do you mean highly degraded media?


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 Post subject: Re: HTS541010A7E630
PostPosted: March 15th, 2017, 21:08 
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Joined: October 24th, 2005, 17:04
Posts: 218
drHDD wrote:
What do you mean highly degraded media?

Very large delays in any operations (verification, reading) ? Often found on HGST/Toshiba made HGST (a-la DLE630)


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 Post subject: Re: HTS541010A7E630
PostPosted: March 16th, 2017, 4:44 
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Joined: February 18th, 2009, 8:08
Posts: 229
Location: Manchester, UK
Hello drHDD - 'highly degraded media' in that the platter (the media) itself has failed. It is not that common, and is easier to determine when the SA is still OK. For example I was working on a failed 2.5" Seagate. One platter read well, the other was very poor. Naturally I assumed one weak head. But new heads replicated the fault, and there were some areas of the platter that read perfectly and others where nearly every sector is bad. I'm not sure if anyone has come up with a conclusive answer as to how a platter can sometimes degrade so badly, so quickly.

For the Hitachi in this post it was not possible to read the service area to get the HDD initialised. Obviously a hotswap to bypass some loading functions of the SA is not an option for these.

John

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 Post subject: Re: HTS541010A7E630
PostPosted: March 17th, 2017, 15:47 
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Joined: October 5th, 2015, 18:53
Posts: 395
Location: Canada
cheadledatarecovery wrote:
For the Hitachi in this post it was not possible to read the service area to get the HDD initialised. Obviously a hotswap to bypass some loading functions of the SA is not an option for these.
John

Did you tried to tune up adaptives to get reading? Did you tried to write to see if it reads after?


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