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northwind
 Post subject: Re: Solving Seagate Rosewood having Translator issue.
PostPosted: June 30th, 2018, 0:44 
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Joined: January 28th, 2009, 10:54
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reco wrote:
Well,

Seagate Rosewood drives are with firmware lock, the very first thing is to unlock; after that, we can not regenerate translator immediately, cuz that will lead to user sector access interruption and we can not restore the disk to the status before regenerating translator (but with backup of sys file, such attempt will have no threat to client data, we can still restore the disk to its original status).

The right procedures to fix Rosewood are:
1. Unlocking；
2. Backup firmwares especially sys file of 28 and 35;
3. Recalculate translator, and fix user sector access interruption (Restore the disk to its original status with the ablility of writing back sys file).


I kindly disagree.

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reco
 Post subject: Re: Solving Seagate Rosewood having Translator issue.
PostPosted: June 30th, 2018, 2:30 
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Joined: August 7th, 2015, 5:48
Posts: 24
Location: New York, USA
ddrecovery wrote:
I have just attended the Ace Labs conference in Las Vegas. Ace have created a way to resolve media cache issues with Rosewoods. As stated earlier, the media cache on modern drives can be extremely large (up to 90GB). The media cache does contain a lot of recently saved data. Ace did not have a launch data for the fix, but I can assure you it does work and will be available soon.

Also included with be a way to physically recover the entire media cache for examination from a forensic standpoint. So even if the drive has been wiped, the media cache will contain a lot of recent files.


Ehh, on modern drives, drives with larger media cache size applies to SSHD only. Larger media cache can improve drives' performance, but it makes no sense to make media cache up to 90GB; Cuz media cache of SSHD is stored in its SSD chip, the capacity of these chips can be found directly from manufactures' specifications; If the capacity of the chip can be up to 90GB, definitely it contradicts with commercial principles.

From above view, Ace said media cache can up to 90GB, I will take a sceptical eye on it.
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reco
 Post subject: Re: Solving Seagate Rosewood having Translator issue.
PostPosted: June 30th, 2018, 2:35 
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Joined: August 7th, 2015, 5:48
Posts: 24
Location: New York, USA
northwind wrote:
reco wrote:
Well,

Seagate Rosewood drives are with firmware lock, the very first thing is to unlock; after that, we can not regenerate translator immediately, cuz that will lead to user sector access interruption and we can not restore the disk to the status before regenerating translator (but with backup of sys file, such attempt will have no threat to client data, we can still restore the disk to its original status).

The right procedures to fix Rosewood are:
1. Unlocking；
2. Backup firmwares especially sys file of 28 and 35;
3. Recalculate translator, and fix user sector access interruption (Restore the disk to its original status with the ablility of writing back sys file).


I kindly disagree.


What is your opinion? It would be glad to all of us if you can share your thoughts to us :)
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Spildit
 Post subject: Re: Solving Seagate Rosewood having Translator issue.
PostPosted: June 30th, 2018, 9:22 
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Joined: December 19th, 2006, 8:49
Posts: 9510
Location: Portugal
reco wrote:
(...)From above view, Ace said media cache can up to 90GB, I will take a sceptical eye on it.


If you "blindly" format the translator the data on the media cache will be gone, so if it's indeed 90GB will will loose the last 90GB of data that was used and present on MC ...

Why do you think that the media cache does apply only to SSHD drives ? This is NOT TRUE. Standard modern Seagate drives even if they don't have NAND chips and are not Hybrid drives they do have/use MC....

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Amarbir[CDR-Labs]
 Post subject: Re: Solving Seagate Rosewood having Translator issue.
PostPosted: June 30th, 2018, 12:10 
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Joined: August 15th, 2006, 3:01
Posts: 2532
Location: CDRLabs @ Chandigarh [ India ]
northwind wrote:
reco wrote:
Well,

Seagate Rosewood drives are with firmware lock, the very first thing is to unlock; after that, we can not regenerate translator immediately, cuz that will lead to user sector access interruption and we can not restore the disk to the status before regenerating translator (but with backup of sys file, such attempt will have no threat to client data, we can still restore the disk to its original status).

The right procedures to fix Rosewood are:
1. Unlocking；
2. Backup firmwares especially sys file of 28 and 35;
3. Recalculate translator, and fix user sector access interruption (Restore the disk to its original status with the ablility of writing back sys file).


I kindly disagree.


+1 ,
Thanks Correct Dimitry Sir

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DR-Kiev
 Post subject: Re: Solving Seagate Rosewood having Translator issue.
PostPosted: July 2nd, 2018, 7:26 
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Joined: March 7th, 2009, 12:43
Posts: 834
Location: Data recovery + remote Raid recovery help
reco wrote:
Well,

Seagate Rosewood drives are with firmware lock, the very first thing is to unlock; after that, we can not regenerate translator immediately, cuz that will lead to user sector access interruption and we can not restore the disk to the status before regenerating translator (but with backup of sys file, such attempt will have no threat to client data, we can still restore the disk to its original status).

The right procedures to fix Rosewood are:
1. Unlocking；
2. Backup firmwares especially sys file of 28 and 35;
3. Recalculate translator, and fix user sector access interruption (Restore the disk to its original status with the ablility of writing back sys file).

All who trying recalculate translator on modern seagate drives are amatours. They dont know how things is going in sa.
Translator isn't a couplrit . And you can't backup everything in SA due of bad sectors in specific modules responsible for user data access.

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darkforce1
 Post subject: Re: Solving Seagate Rosewood having Translator issue.
PostPosted: July 2nd, 2018, 9:55 
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Joined: June 27th, 2005, 8:27
Posts: 611
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Have too add defect in nrg.. Complex but solvable.

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darkforce1
 Post subject: Re: Solving Seagate Rosewood having Translator issue.
PostPosted: July 2nd, 2018, 9:59 
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Joined: June 27th, 2005, 8:27
Posts: 611
Location: India
DR-Kiev wrote:
reco wrote:
Well,

Seagate Rosewood drives are with firmware lock, the very first thing is to unlock; after that, we can not regenerate translator immediately, cuz that will lead to user sector access interruption and we can not restore the disk to the status before regenerating translator (but with backup of sys file, such attempt will have no threat to client data, we can still restore the disk to its original status).

The right procedures to fix Rosewood are:
1. Unlocking；
2. Backup firmwares especially sys file of 28 and 35;
3. Recalculate translator, and fix user sector access interruption (Restore the disk to its original status with the ablility of writing back sys file).

All who trying recalculate translator on modern seagate drives are amatours. They dont know how things is going in sa.
Translator isn't a couplrit . And you can't backup everything in SA due of bad sectors in specific modules responsible for user data access.


Agreed With Dr.

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reco
 Post subject: Re: Solving Seagate Rosewood having Translator issue.
PostPosted: July 2nd, 2018, 23:06 
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Joined: August 7th, 2015, 5:48
Posts: 24
Location: New York, USA
DR-Kiev wrote:
reco wrote:
Well,

Seagate Rosewood drives are with firmware lock, the very first thing is to unlock; after that, we can not regenerate translator immediately, cuz that will lead to user sector access interruption and we can not restore the disk to the status before regenerating translator (but with backup of sys file, such attempt will have no threat to client data, we can still restore the disk to its original status).

The right procedures to fix Rosewood are:
1. Unlocking；
2. Backup firmwares especially sys file of 28 and 35;
3. Recalculate translator, and fix user sector access interruption (Restore the disk to its original status with the ablility of writing back sys file).

All who trying recalculate translator on modern seagate drives are amatours. They dont know how things is going in sa.
Translator isn't a couplrit . And you can't backup everything in SA due of bad sectors in specific modules responsible for user data access.


The most important are sys file of 28 and 35, and if you can not backup modules due to bad sectors, you can also try to read via ABA method; if still not, please ask Jesus for help ：）
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drHDD
 Post subject: Re: Solving Seagate Rosewood having Translator issue.
PostPosted: July 4th, 2018, 23:11 
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Joined: October 5th, 2015, 18:53
Posts: 428
Location: Canada
So if I will give you rosewood with cleared SA and 28 and 35 from it - you will able to get access to all user files, right?
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reco
 Post subject: Re: Solving Seagate Rosewood having Translator issue.
PostPosted: July 5th, 2018, 22:57 
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Joined: August 7th, 2015, 5:48
Posts: 24
Location: New York, USA
drHDD wrote:
So if I will give you rosewood with cleared SA and 28 and 35 from it - you will able to get access to all user files, right?



We are not near, if yes, I can try :D

Luckly, I have done some cases successfully, and yesterday, I fixed a customer case with sys 28 only;

Translator issue is complicated, there is no must success solution, but with backups, at least we restore to original status for future attempt.
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