ST2000LM007-1R8174 Serial : ZDZ1QXEE

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Alandata Recovery

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Nov 5, 2019, 1:47:08 PM11/5/19
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Model : ST2000LM007-1R8174
Serial : ZDZ1QXEE
Firmware : SBK2
Capacity : 2TB

Did head swap.
Drive came up and was getting lots of recov servo errors - but after a long time came ready.
It showed drive ID and 2tb data.
I tested writing and could not write.

but I had access to user data.
I was afraid of doing any writing to the drive.
Test writing DIC in terminal mode get UNSUPPORTED BY FIRMWARE message
I tried to edit HD-ID in ram but it would not.
So I used de to start building file tree
eventually DE powered off the drive and now it wont give access to user data.
Now comes up as 0mb
Module 2b is translator and I cant read it.

and mod-93 wont read now
93 was reading fine
but all my test writes failed
I could read best with terminal
what is the rule for this drive?
its an SMR drive
So you dont want to trigger it to clear the mcmt
so in SMP-93 options:
1)Can we write any changes to options in 93 ?
2) If we write is it only using terminal mode ?
3) If we change SMP-93 options - is it dangerous to change any MC media cache settings?

4) since I swapped heads would it be best to also move over rap cap and sap? which ones? sap? rap? cap?

It did come fully ready and I was reading user data until DE powered the drive down..... my bad - but that sucks  

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t...@desertdatarecovery.com

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Nov 5, 2019, 3:09:20 PM11/5/19
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You can normally set SMP in RAM if you cant write to the drive.

Also with a lot of these SMR drives you need to write in indirect mode.

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Data Recovery Guru

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Nov 5, 2019, 7:07:13 PM11/5/19
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Do NOT mess with the MC settings

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t...@desertdatarecovery.com

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Nov 5, 2019, 7:12:55 PM11/5/19
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Why not. PC3000 allows you to work with the MC on these drives?

Data Recovery Guru

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Nov 5, 2019, 7:20:07 PM11/5/19
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Maybe I have a brainfart, but would it not interfere with losing data from cache (cache on disk - forgetting the exact terminology) that has not yet been written permanently to the disks?

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wayne horner

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Nov 5, 2019, 7:51:22 PM11/5/19
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I think guru is correct.... if I read it right.
The mcmt is a track on the outer edge that holds 90gb of 'cached' data
the geniuses at seagate dont bother to flush the cache when the drive is idle
but fiddling with the settings can make it wipe the mcmt without committing it to disk
They say large sections of the MFT can live only in the MCMT

image.png
SMR are shingled magnetic recording drives where data is written in bands of 25mb?
They cache the band on the outer edge while they update the band.

Alandata Data Recovery -  (949)287-3282  
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Desert Data Recovery

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Nov 5, 2019, 8:09:32 PM11/5/19
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All I can say is that I have used Ace Labs new method of working with the MC several times and it has worked great. 

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t...@desertdatarecovery.com

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Nov 6, 2019, 9:12:00 AM11/6/19
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I am not saying clearing the MC is the cure, if you do that then I agree that data is gone, but PC3K can help you rebuild/correct the MC in Rosewoods.

image001.png

Data Recovery Guru

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Nov 6, 2019, 9:15:11 AM11/6/19
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t...@desertdatarecovery.com

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Nov 6, 2019, 9:17:15 AM11/6/19
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If you have access to the latest Seagate manual it’s all I there. If not PM me.

image001.png

IT LAND

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Nov 8, 2019, 12:10:42 AM11/8/19
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+1 to Tim, i also find that latest version of PC3K works reasonably fine with the MC, and as long as there isn't severe media damage it should do the job. Obviously super important to backup the FW before any changes are done if possible, otherwise kamikaze mode.
Problem is that these sh*t Rosewoods usually comes in with a lot of faulty heads and media damage.
I had few cases like that in the past 2 months and worked on them intensively swapping up to 5 set of heads per drive, which gave me access to the FW area in some cases but couldn't write anything to the media and show 0 capacity so these cases are usually not doable - depends it your main modules are still ok or badly corrupted as without write you can't repair them. Rosewood are junk.

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Amarbir[CDR-Labs]

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Nov 8, 2019, 9:28:14 AM11/8/19
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Hello,
     I have read the manual and its all going above my head  ,can you make a video of this tim i think brian also knows about this .The best practise with these shitty drives is platter cleaning before head replacement ,It does wonders 

t...@desertdatarecovery.com

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Nov 8, 2019, 9:40:22 AM11/8/19
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I will look to do this when I get a little time, hopefully Ace might do a blog post on it first.

 

 

From: datarecovery...@googlegroups.com <datarecovery...@googlegroups.com> On Behalf Of Amarbir[CDR-Labs]
Sent: Friday, November 8, 2019 7:28 AM
To: DataRecoveryCertification <datarecovery...@googlegroups.com>
Subject: Re: ST2000LM007-1R8174 Serial : ZDZ1QXEE

 

Hello,

     I have read the manual and its all going above my head  ,can you make a video of this tim i think brian also knows about this .The best practise with these shitty drives is platter cleaning before head replacement ,It does wonders 

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Amarbir Dhillon

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Nov 8, 2019, 9:53:14 AM11/8/19
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Tim,
     Belive Me They Are Not Going To Make It ,If they had to it would be done ages ago

Regards

Amarbir Singh Dhillon
CEO - Chandigarh Datarecovery Labs " @ CDRLabs  , India


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t...@desertdatarecovery.com

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Nov 8, 2019, 1:30:21 PM11/8/19
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Amarbir, how do you clean the platters on these drives?

 

 

From: datarecovery...@googlegroups.com <datarecovery...@googlegroups.com> On Behalf Of Amarbir[CDR-Labs]
Sent: Friday, November 8, 2019 7:28 AM

To: DataRecoveryCertification <datarecovery...@googlegroups.com>
Subject: Re: ST2000LM007-1R8174 Serial : ZDZ1QXEE

 

Hello,

     I have read the manual and its all going above my head  ,can you make a video of this tim i think brian also knows about this .The best practise with these shitty drives is platter cleaning before head replacement ,It does wonders 

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