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 Post subject: Re: Strange. Fast format and full 0 .USB WD10SMZW
PostPosted: October 11th, 2019, 13:56 
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Joined: September 8th, 2009, 18:21
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Location: Australia
TRIM Command Support for WD External Drives:
https://support-en.wd.com/app/answers/detail/a_id/25185

Quote:
WD external SSD drives and WD external HDD drives that have SMR (Shingled Magnetic Recording) drive inside, offer TRIM command support which is enabled by default in Windows 7 and above, designed to maintain the performance of SSD or HDD at an optimal level over the lifetime of the drive.
...
TRIM command support on the USB (SCSI) side is called UNMAP and the controller performs an UNMAP to TRIM translation.

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 Post subject: Re: Strange. Fast format and full 0 .USB WD10SMZW
PostPosted: October 13th, 2019, 10:41 
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Joined: March 7th, 2009, 12:43
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Location: Angel Data Recovery
digisupport wrote:
Recovering deleted files or formatted drives is going to be fun.
Need to ask client to bring a translator backup to make it possible :wink:


Yes, or make up how to build custom translator in order get access to "trim wiped" areas ;)

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 Post subject: Re: Strange. Fast format and full 0 .USB WD10SMZW
PostPosted: October 13th, 2019, 12:55 
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Joined: August 15th, 2006, 3:01
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Location: CDRLabs @ Chandigarh [ India ]
Hi Guys ,
I had a case that was just quick formatted and voila all is gone .I do agree with Pepe and DR-Kiev a custom translator is a possibility or something else

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 Post subject: Re: Strange. Fast format and full 0 .USB WD10SMZW
PostPosted: October 13th, 2019, 15:24 
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Joined: June 16th, 2018, 12:09
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Location: Turkey
I have searched Google. As I understood;
Trim function working as guessed in this topic. Data is there. But TRIM function tell that block has no data. It's working with blocks. Not sector's. Hdd virtually accept there is no data. I am afraid this function works when normal using in windows shift+delete also. ( couldn't tested. I don't have this type hdd in my hand now) So trim function looking for garbage data . And if there is garbage data TRIM function working. Not interested with sectors. And That data gone immideattly. So many people would loose user data in future with this function. Kinda Harakiri lol.

Another info , I have checked customers hdd with HDtune for bad sector. There was amazing speed that faster than SSD .

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 Post subject: Re: Strange. Fast format and full 0 .USB WD10SMZW
PostPosted: October 14th, 2019, 3:59 
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Joined: March 6th, 2010, 3:46
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Location: Kolding | Denmark
DR-Kiev wrote:
digisupport wrote:
Recovering deleted files or formatted drives is going to be fun.
Need to ask client to bring a translator backup to make it possible :wink:


Yes, or make up how to build custom translator in order get access to "trim wiped" areas ;)


Will join you teaching class for that, when you have figured it out :D

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 Post subject: Re: Strange. Fast format and full 0 .USB WD10SMZW
PostPosted: October 14th, 2019, 11:11 
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Joined: April 3rd, 2011, 0:19
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I'm sure Ace (and probably others) are reverse engineering a way to tell the drive's firmware that all sectors are occupied so as to make it possible to scan for deleted data again.

But, I do wonder how much manual work it will ultimately entail if the translation involves creating new shifts whenever a bad sector if added to the G-List. It'll probably entail using some sort of virtual sector translation.

It's an interesting development, but might not ultimately be a bad thing. It'll cut the PC shops completely out of the logical data recovery game on these drives.

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 Post subject: Re: Strange. Fast format and full 0 .USB WD10SMZW
PostPosted: October 14th, 2019, 14:59 
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data-medics wrote:
It's an interesting development, but might not ultimately be a bad thing. It'll cut the PC shops completely out of the logical data recovery game on these drives.

Any development that cuts out the end user is a bad thing. Nobody owes the data recovery business a living.

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 Post subject: Re: Strange. Fast format and full 0 .USB WD10SMZW
PostPosted: October 14th, 2019, 19:08 
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So. If MBR parts or something other parts has bad sector. TRIM function would tell to drive . Data not important. So no active partition. And game over. Data would fly over atmosphere . This function would make big headache for hdd manufacturer also. There should be a way to reconstruct drive to get data back. My guess WD will open a data recovery part soon as Seagate

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 Post subject: Re: Strange. Fast format and full 0 .USB WD10SMZW
PostPosted: October 14th, 2019, 19:48 
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ISTM that TRIM should only be triggered by those events which are initiated by the user, eg file deletion, volume formatting. It wouldn't make sense for the OS to TRIM a file system which it knows to be corrupt or inconsistent.

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 Post subject: Re: Strange. Fast format and full 0 .USB WD10SMZW
PostPosted: February 17th, 2020, 10:47 
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Joined: May 13th, 2019, 7:50
Posts: 81
Location: Nederland
Stumbled on this https://support-en.wd.com/app/answers/detail/a_id/25185

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