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LDR needed for st3320820A

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magnetepazzo

Post subject: LDR needed for st3320820A

Posted: November 13th, 2018, 6:33

Joined: September 14th, 2018, 13:41
Posts: 299
Location: italy

LDR needed for st3320820A firmware 3.AAD
Thanks

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fzabkar

Post subject: Re: LDR needed for st3320820A

Posted: November 13th, 2018, 15:18

Joined: September 8th, 2009, 18:21
Posts: 16963
Location: Australia

Your tool should be able to generate a loader from these resources:
http://files.hddguru.com/download/PC-3000%20Support/Firmware/Seagate/Galaxy/ST3320820A_S-6D_3.AAD_.089_.0GB.rar

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michael chiklis

Post subject: Re: LDR needed for st3320820A

Posted: November 14th, 2018, 15:49

Joined: December 5th, 2011, 5:38
Posts: 1741
Location: Verona, Italy

MRT hasn't any function for generating LDR file from U5 drives fw resources.
Building it directly from hdd doesn't work (fake ldr).

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My firmware database:
https://mega.nz/folder/O01DkBRI

Last edited by michael chiklis on November 14th, 2018, 15:53, edited 1 time in total.

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fzabkar

Post subject: Re: LDR needed for st3320820A

Posted: November 14th, 2018, 15:53

Joined: September 8th, 2009, 18:21
Posts: 16963
Location: Australia

I can try to make a loader by hand, if the OP would like to give it a go.

Can you show us a "fake loader"?

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michael chiklis

Post subject: Re: LDR needed for st3320820A

Posted: November 15th, 2018, 20:53

Joined: December 5th, 2011, 5:38
Posts: 1741
Location: Verona, Italy

fzabkar wrote:

I can try to make a loader by hand, if the OP would like to give it a go.

Can you show us a "fake loader"?

https://mega.nz/#F!O01DkBRI!MxP2J6ZNqXD ... Q!mk1gjI7I

Download ST3160215A-3.AAD-9RABW60Y.rar from that folder, you will find two LDRs, one from mrt and another from pc3000, u can compare them.
I've saved also tracks inside ST3160215A-3.AAD-9RABW60Y.rar

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My firmware database:
https://mega.nz/folder/O01DkBRI

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michael chiklis

Post subject: Re: LDR needed for st3320820A

Posted: November 15th, 2018, 21:13

Joined: December 5th, 2011, 5:38
Posts: 1741
Location: Verona, Italy

Spildit wrote:

Can't you simply load by SDLD the required "tracks" from a PC-3000 dump using MRT ?

Like for example using SeDiv you do SDLD to the drives the relevant portion of firmware code on tracks ...

Not possible, it's possible only to load LDR (only from pc3000 database because those one created with mrt won't work) and buffer.

Attachment:

Load LDR in MRT U5.jpg [ 65.21 KiB | Viewed 12397 times ]

Attachment:

Write buffer MRT U5.jpg [ 207.24 KiB | Viewed 12397 times ]

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My firmware database:
https://mega.nz/folder/O01DkBRI

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michael chiklis

Post subject: Re: LDR needed for st3320820A

Posted: November 16th, 2018, 8:11

Joined: December 5th, 2011, 5:38
Posts: 1741
Location: Verona, Italy

Sorry, i thought mega folder could be shared publicly, but now i see it's not like that.
Ok, i attached here the fw resource

Attachment:

ST3160215A-3.AAD-9RABW60Y.rar [2.17 MiB]
Downloaded 476 times

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My firmware database:
https://mega.nz/folder/O01DkBRI

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fzabkar

Post subject: Re: LDR needed for st3320820A

Posted: November 16th, 2018, 16:51

Joined: September 8th, 2009, 18:21
Posts: 16963
Location: Australia

PC3K loaders are compressed whereas MRT's are not. It seems very odd that MRT can recognise and decompress a PC3K loader, yet cannot make use of its own.

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A backup a day keeps DR away.

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reco

Post subject: Re: LDR needed for st3320820A

Posted: November 16th, 2018, 23:00

Joined: August 7th, 2015, 5:48
Posts: 44
Location: New York, USA

fzabkar wrote:

PC3K loaders are compressed whereas MRT's are not. It seems very odd that MRT can recognise and decompress a PC3K loader, yet cannot make use of its own.

As i know, loaders backup by PC3K/MRT in data base are compressed, but when back up as file, both are uncompressed. MRT can recognise and decompress PC3K loader, however not the other way around.

I do not know why it can't be used here regarding a u5 drive, I do not have any in hand at moment otherwise i can try and give you more information by testing both PC3K&MRT. Personally experience this can be used so far if it is a f3 drive.

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fzabkar

Post subject: Re: LDR needed for st3320820A

Posted: November 17th, 2018, 15:34

Joined: September 8th, 2009, 18:21
Posts: 16963
Location: Australia

IIUC, a "classic" loader (LDR) consists of an "Mrt" header followed by several firmware components, each of which is preceded by a header of the form ...

This would suggest that the data recovery software interprets the LDR file, extracts the individual firmware components, and then uploads them to the drive, one by one.

OTOH, an F3 loader (LOD) appears to be uploaded to the drive as a complete LOD file, and it is the drive's firmware which then extracts each component rather than the tool.

Could it be that PC3K's classic LDR is decompressed and executed by the drive?? Or could it be that MRT expects all LDR files to be compressed, in which case its own uncompressed version would be detected as a fake?

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fzabkar

Post subject: Re: LDR needed for st3320820A

Posted: November 17th, 2018, 19:19

Joined: September 8th, 2009, 18:21
Posts: 16963
Location: Australia

Spildit wrote:

F3 loaders are like "overlay" that you send to the drive, for example like Module 11 on WD. Overlay on F3 arch can be send by ATA download microcode standard command.

I was in fact wondering whether there exists a Seagate format for a classic loader which can be sent by the ATA Download Microcode command (92h). I did attempt to parse the payload in an official Seagate Galaxy firmware update. It appears to have a special format that is totally different to Mrt's loader. However, it is not clear whether Seagate's update utility strips the firmware components from the LDR file and uploads them separately via a VSC, or whether the drive itself handles everything.

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A backup a day keeps DR away.

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colanco

Post subject: Re: LDR needed for st3320820A

Posted: November 19th, 2018, 17:15

Joined: December 6th, 2012, 8:49
Posts: 291
Location: españa

MRT has virtually no support for seagate with ST 10 architecture.

It has the module, but few possibilities (similar to the samsung module).

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reco

Post subject: Re: LDR needed for st3320820A

Posted: November 19th, 2018, 21:00

Joined: August 7th, 2015, 5:48
Posts: 44
Location: New York, USA

Spildit wrote:

fzabkar wrote:

Could it be that PC3K's classic LDR is decompressed and executed by the drive??

I'm sure this is not the case.

F3 loaders are like "overlay" that you send to the drive, for example like Module 11 on WD. Overlay on F3 arch can be send by ATA download microcode standard command. Some tools do have loaders "encrypted" for them. SeDiv do use this method. This is to prevent files for SeDiv to be used with other tools. SeDiv decrypts the files and send them to the drive.

On ST-10 / classic the drive have no way to decompress the loader in PC3K format (or MRT). Also you are not sending by ATA, you are SDLD (Seagate Protocol) by terminal the "components" so the tool itself have to decode the loader file and send individual components to the drive. You can also chose what components to send. You might want for example send only ATA + APP and don't send CERT, etc ... The drive doesn't understand "loader" and you are not sending it by ATA. Those loaders do have to be "decoded" by the firmware tool and when you use the SDLD protocol by terminal you need to send the code directly.

This is of course a MRT bug. It can decode the PC3K loader but can't decode it's own loader.

That make sense.

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