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ST1000LM035 , damaged head ?

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laptokowiec

Post subject: ST1000LM035 , damaged head ?

Posted: January 7th, 2020, 12:04

Joined: October 24th, 2009, 8:16
Posts: 274
Location: Gdansk - Poland

Hi
Half of its LBAs are readable, most of them with full speed, the other half is readable but very slow and shows the same content for all its sectors.
Is it possible that one head is damaged even though it returns 'something' (the same content - cache ?) and not returning ERR ?

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unknown

Post subject: Re: ST1000LM035 , damaged head ?

Posted: January 7th, 2020, 13:38

Joined: October 21st, 2007, 8:48
Posts: 1631

At least 25~30 % of data has gone.

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Dananjaya

Post subject: Re: ST1000LM035 , damaged head ?

Posted: January 8th, 2020, 0:54

Joined: February 2nd, 2019, 1:21
Posts: 192
Location: Sri Lanka

If you have same content of this seagate series in one head, most of time you should swap the heads.

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ddrecovery

Post subject: Re: ST1000LM035 , damaged head ?

Posted: January 8th, 2020, 10:25

Joined: June 11th, 2013, 17:01
Posts: 1710
Location: Phoenix, AZ USA

Do you have good data from the other parts of the drive?
If this area is contiguous to the end of the drive, it may have been previously wiped with the same code in each sector.

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laptokowiec

Post subject: Re: ST1000LM035 , damaged head ?

Posted: January 10th, 2020, 3:31

Joined: October 24th, 2009, 8:16
Posts: 274
Location: Gdansk - Poland

There are good data or 00 in readable areas

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ddrecovery

Post subject: Re: ST1000LM035 , damaged head ?

Posted: January 10th, 2020, 10:12

Joined: June 11th, 2013, 17:01
Posts: 1710
Location: Phoenix, AZ USA

laptokowiec wrote:

There are good data or 00 in readable areas

That doesn't mean the drive was not previously wiped.

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laptokowiec

Post subject: Re: ST1000LM035 , damaged head ?

Posted: January 10th, 2020, 12:31

Joined: October 24th, 2009, 8:16
Posts: 274
Location: Gdansk - Poland

In every 'bad area':
1. the same content
2. very slow access.
Can't imagine anyone writing only to slow sectors.

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ddrecovery

Post subject: Re: ST1000LM035 , damaged head ?

Posted: January 10th, 2020, 12:38

Joined: June 11th, 2013, 17:01
Posts: 1710
Location: Phoenix, AZ USA

laptokowiec wrote:

In every 'bad area':
1. the same content
2. very slow access.
Can't imagine anyone writing only to slow sectors.

If it is slow access in that area then you are probably right you have other issues.
All I was saying was that at some point in the past the drive may have been wiped ie before the issues stated.
Just wanted to rule out a red herring.

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