Samsung ST1000LM024 PreAmp Questions

[shahij]

Always we select donor according to PreAmp Version.

Today got a new info that a guy can Recover data without matching PreAmp version. Do you agree with the statement? if agree, who has done so far already on this drives?

[Amarbir[CDR-Labs]]

Always we select donor according to PreAmp Version.

Today got a new info that a guy can Recover data without matching PreAmp version. Do you agree with the statement? if agree, who has done so far already on this drives?

Well,
Do not make your secrets public domain ,If you have some methods about samsung donor matching then talk to me via Skype tomorrow and share your method i will tell you exactly what is what in this ,Just completed a case were both platters were in my hand like a ball and still recovery done man

[shahij]

Ive my secrets as well. Ive no problem in donor selection.
My question is elsewhere. It was strange to me when someone is stating in Samsung they can put any head.... I am interested to know the logic if it really does.
And this model is one of my favourite model, Ive done uncountable surgery in this model.

[Martin]

Always we select donor according to PreAmp Version.

Today got a new info that a guy can Recover data without matching PreAmp version. Do you agree with the statement? if agree, who has done so far already on this drives?

It is possible. Actually, all four types of these preamps are analogs each to other, limitation is in firmware only.

[fzabkar]

The 2TB version of that model (ST2000LM003) reports the preamp voltage in terminal. Some PCBs report 1.8V, others 2.5V. Are the preamps still compatible?

[shahij]

Thats really interesting info.

Can you explain further? Do you have experience in doing so?

[Martin]

The 2TB version of that model (ST2000LM003) reports the preamp voltage in terminal. Some PCBs report 1.8V, others 2.5V. Are the preamps still compatible?

This model is M9T family, we are talking about M8. Yeah, I know that it uses, at least, one of those preamps, TI5565. I didn't do any research for this, probably preamp can control voltage and it can operates in voltage range like, for example, NAND chip. For NAND Flash Memory chip, in default, we have to apply Vcc=3.3 V, but it can operates in range 2.7V ~ 3.6 V.

[H13]

Here there is something to look talking about Samsung drive

https://www.youtube.com/watch?v=wjdA_fKQQvw&t=97s


have some one check ?!

Regards

[Martin]

Here there is something to look talking about Samsung drive

https://www.youtube.com/watch?v=wjdA_fKQQvw&t=97s


have some one check ?!

Regards

Nothing special. Some guy with terrible russian prononsation shows standard heads replacement operation. How it is relates to current topic? Promo action for those company?

[H13]

He said something about samsung heads !

have a deep look man

[labtech]

have some one check ?

The video? Or if someone checked as in research?

[Martin]

He said something about samsung heads !

have a deep look man

Not heads, preamps. And I would not say it is not useful, but I would like to know what is the statistics of success matching. Sometimes you can have some strange case/behaviour with similar drive after hundred cases. And actually, that guy talking about symbols, that are more symbols than amount of preamps.

[H13]

He said something about samsung heads !

have a deep look man

Not heads, preamps. And I would not say it is not useful, but I would like to know what is the statistics of success matching. Sometimes you can have some strange case/behaviour with similar drive after hundred cases. And actually, that guy talking about symbols, that are more symbols than amount of preamps.

i don't know this guy to promote his work .. but he is talking about matching the 3 digit from the SN

[Amarbir[CDR-Labs]]

Well,
Samsungs are matched in a different was specially hr M8E Family Like the ST1000LM024 That i did a few days before with all broken sliders on all 4 heads and then removed platters and removed sliders ,fixed new needs and recovered user data

[shahij]

@martin, lets assume you need a donor head to the patient, then how are you going to modify the fw in patient when the patient is inaccessible due to bad head?
2. okay, lets think you will do that after doing the swap/surgery, you don't have any access to fw after the surgery as of different revision, how will you modify the fw?
3. Lets assume you can make a HS on patient with another 2nd donor, what modules are going to modify specifically so that it can match the revision?
4. If the contents of patient preamp can be transferred to donor hsa, can be a clue, but how are you going to conduct this in practice?

Last question - the repeat - is there anyone in practice made a different preamp hsa workable to that drive? or just still kept in theory?

@amarbir, your case story is not relevent with the topic in discussion.

[Martin]

He said something about samsung heads !

have a deep look man

Not heads, preamps. And I would not say it is not useful, but I would like to know what is the statistics of success matching. Sometimes you can have some strange case/behaviour with similar drive after hundred cases. And actually, that guy talking about symbols, that are more symbols than amount of preamps.

i don't know this guy to promote his work .. but he is talking about matching the 3 digit from the SN

He is talking about one symbol after two constant symbols.

[Martin]

@martin, lets assume you need a donor head to the patient, then how are you going to modify the fw in patient when the patient is inaccessible due to bad head?
2. okay, lets think you will do that after doing the swap/surgery, you don't have any access to fw after the surgery as of different revision, how will you modify the fw?
3. Lets assume you can make a HS on patient with another 2nd donor, what modules are going to modify specifically so that it can match the revision?
4. If the contents of patient preamp can be transferred to donor hsa, can be a clue, but how are you going to conduct this in practice?

Last question - the repeat - is there anyone in practice made a different preamp hsa workable to that drive? or just still kept in theory?

@amarbir, your case story is not relevent with the topic in discussion.

I'm not offensive, it is technical: If you know how the drive is initializing after power-on, you would not ask these questions. Small tip: ROM firmware, not diskware (that part of FW located on the platters).
About practice - on this forum, as like on many others, there are only theories, nobody shares valuable practice/knowledge.

[shahij]

Thank you Martin, got the clue. My 5th question would be as there are no way - the ROM...!!! There are none made any fruitful reply to that topic, as majority doesn't have any idea about that, or not interested...

Amarbir tried to contribute, but he couldn't understand or couldn't come close to the topic we are talking about. but thanks for trying to be here.

Time to research...!

[Martin]

Good luck.

[fzabkar]

Some ROMs appear to be able to support more than one type of preamp without modification:

Code:

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F

0005A740  18 19 01 90 2A 50 41 55 4E 49 5F 4C 32 39 35 38  ....*PAUNI_L2958
0005A750  00 00 00 00 2A 50 41 5F 54 49 35 35 36 35 00 00  ....*PA_TI5565..
0005A760  0A 3E 3E 3E 49 6E 76 61 6C 69 64 20 50 41 20 56  .>>>Invalid PA V
0005A770  49 44 0A 00 2A 50 41 20 56 49 44 3D 00 00 00 00  ID..*PA VID=....
0005A780  20 50 4E 3D 00 00 00 00 20 52 65 76 3D 00 00 00   PN=.... Rev=...
0005A790  20 49 6E 76 61 6C 69 64 20 50 72 65 61 6D 70 0A   Invalid Preamp.