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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: October 29th, 2018, 15:43 
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Agree, it does look good.

Now you just have to find a compatible PCB and write the ROM back to it. You simply replace the PCB and you don't short anything, just try to detect the drive with WDMarvel, it shouldn't click ...

Then you can use something like WDR DEMO to write ROM back if you don't want to pay for a license of WDMarvel to write back to the drive.

http://www.hddoracle.com/viewtopic.php?f=86&t=1127

If the drive just clicks with new PCB (that is working on another drive) + native ROM then head(s)/pre-amp are gone and you will not get away without clean room work.

If something like the read/write channel on the PCB are gone by the SATA link is still ok it makes sense that you can't read a single sector of the drive including the SA but that you can get ROM by VSC.

At any rate don't get hope high ...

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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: October 29th, 2018, 20:41 
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Thanks Spildit,

Maybe another dumb question, but would the incompatible (yet working) PCB from that donor I bought be enough to see whether or not the mechanics were intact or would it still possibly click?

Thanks Again


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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: October 29th, 2018, 20:45 
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I believe that the MCU on the other PCB has a different part number (88i....).

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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: October 29th, 2018, 21:02 
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fzabkar,

You are correct (went ahead and pulled it off). It's an 88i8846E-TFJ2 rather than a 88i8845D-BHG2. The layout is actually a little different, with a long memory chip sitting next to that MCU and an 8-pin something that looks like maybe a flash chip below it. Odd thing, it actually has a hint of a dark spot in the green foam in the center of that main chip, but it was a sealed up supposedly new drive.

You think it would still click the same though? I know it's not capable of having that ROM dumped to it, I was just wondering if it might save me the trouble of doing all that if the heads are shot.

Thanks!


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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: October 29th, 2018, 21:10 
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Jidis wrote:
You think it would still click the same though?
I don't know.

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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: October 30th, 2018, 15:36 
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fzabkar wrote:
Jidis wrote:
You think it would still click the same though?
I don't know.


Yes.

If you use a non-compatible PCB even if you copy ROM code over most likely it will just click. I did test it with some models of WD drives some years ago and they did just click. Moreover you risk to damage the PCB/Head(s), etc if you use PCBs that are not compatible (on my tests i didn't damage anything but i wouldn't risk).

Also the testing would be inconclusive. You do need 100% compatible PCB to be sure.

Also on some models it *might* not click if you use incompatible PCB, i don't know but because on the ones i did test they did just click you can't be sure of anything untill you do find a compatible PCB that you are 100% sure to be working as well.

Beware of where you buy the PCB as well. You might be better with a full drive so that you are 100% sute that the PCB is not damaged.

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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: October 30th, 2018, 16:06 
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Thanks again to both of you.
Spildit wrote:
Beware of where you buy the PCB as well. You might be better with a full drive so that you are 100% sute that the PCB is not damaged.

I would've asked about that next. 8)

The board number turns up ones on eBay that say "tested good", but they've also got burn marks on them. Then with some of the drives on there, they either don't have bottom pictures, or you can't read the number. Do you have any pointers on where to get the drive? Also, are the internals as bad about compatibility on these things as the PCB is, or are the heads,etc. typically the same for this model number. I'm figuring that might be another reason to try to track down a whole drive, as I could hang onto the spare parts if I ever decide to have someone work on it (unless this donor one already has the same heads and all).

Take Care


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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: October 30th, 2018, 16:42 
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If you match the FULL model like in case of your working drive - model - WD3200AAKS-61L9A0 the PCB on the drive will be the SAME. You can search eBay either by PCB number or drive full model. If you match drive full model it will have compatible PCB.

Regarding where to get drives i would say to check for example eBay (if you need full drive) and chose a seller with 100% positive feedback with several sales and decent price.

If you chose guys that specialize in selling PCBs and drives for data recovery the price will be lot higher and you don't need adaptation service as you do already have your ROM dump so you can write it back yourself and save $$$ in supplyer of drive/PCB....

I would buy a complete drive just to be sure that i could do a full surface scan on the donnor. Also to try HOT SWAP ! If you do have a full drive you can use hot swap procedure to confirm if head(s)/pre-amp is bad. If drive have firmware issues you might gain SA access with hot swap and for that you need a full drive. I would go for a full drive on ebay.

http://www.hddoracle.com/viewtopic.php?f=117&t=714

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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: October 30th, 2018, 17:11 
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Thanks Again Spildit- I'll start looking!

Didn't realize the full number would be a PCB match. Could've gotten it the first time (looks like this guy's full name was WD3200AAKS-00B3A0).

Take Care


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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: October 30th, 2018, 17:34 
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Bought.

Had to get a used one, but it was cheap and is supposed to be "fully operational" and the seller's got 99.7% positives on eBay. I'll see what happens within the next few days, but something inside me is expecting the worst.

Thanks


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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: November 1st, 2018, 10:20 
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Ok ! Please do let us know when you do get the drive ! Good luck !

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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: November 2nd, 2018, 17:28 
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Man, dumbo strikes again!

I was so busy matching that last number, it looks like I bought a 250 instead of a 320. Numbers on the PCB are the same until the end. Mine is a 2060-701537-002 rev P1 , and this latest donor PCB is a 2060-701537-003 rev A

On removing it, it does actually look the same this time. Any chance that can still be used, or should I continue building my stack? :lol:

Thanks!


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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: November 3rd, 2018, 15:05 
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Try it .... Even without ROM swap it should spin and it shouldn't click ...

Check if the MCU and Spindle controller is the same ....

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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: November 3rd, 2018, 15:57 
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Hi again Spildit,

Doesn't look good. About the same "whirr/clinkclink,whirr/clinkclink,whirr/clinkclink"...then spins down. I guess that means heads,huh? I'll probably have to put it aside and figure I learned my lesson. :(

I really do appreciate everybody's help through this though.

Much Thanks!

PS- Yes, the two chips were the same (at least the main top number).


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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: November 3rd, 2018, 18:10 
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Yeah ... most likely heads ...

:( :( :(

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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: November 3rd, 2018, 18:13 
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You can still try one thing :

- Donor drive - READ ROM.
- Damaged drive - Place PCB on Donor drive.
- Does it click ? Can you ear any strange clicking noises on the new working donor with the PCB from the damaged drive ? If so incompatibilty can cause this. If there is no strange noise apart from the fact that you can't access any LBA i would say PCBs should be compatible and there is no reason apart from damaged heads for the damaged drive to click ....

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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: November 3rd, 2018, 20:03 
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Spildit,

If I'm reading those instructions correctly, why the reading of the good drive's ROM if I'm just going to put the bad drive's PCB on it (or do I also dump the read ROM into the bad drives PCB)?

Thanks!


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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: November 4th, 2018, 12:11 
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Well, just for testing ....

If you place the bad drive PCB on the good drive and it doesn't click then the new good drive PCB on the damaged drive shouldn't click as well.

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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: November 4th, 2018, 19:22 
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No go again I guess Spildit. The "bad" PCB doesn't really do anything out of the ordinary on that 250G, other than showing as size=0 in the BIOS, which I guess is normal for a mismatch. It spins up to the usual healthy faint mechanical noises, then just settles rather than spinning back down.

Sorry it took me a little while to get that stuff back up and check.

Appreciate It!


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 Post subject: Re: What am I up against (clicking drive with amnesia)?
PostPosted: November 4th, 2018, 20:18 
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Ok,

Looks like the "bad" PCB is good. Looks like the problem with the bad drive is indeed related to bad head(s)/pre-amp.

If the PCBs were to be 100% incompatible then the "bad" PCB on the good drive would make it just click. If it doesn't click but if the "good" pcb on the bad drive makes it click then the problem is 100% not related to PCB but related to head/pre-amp ...

Sorry :(

Drive needs "clean room work" for data recovery.

Not Do-It-Yourself anymore. Game over.

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