Toshiba donor for headswap

[Markus Bauer]

Hi,

would that two drives match for a head swap?

[t...@desertdatarecovery.com]

Should be okay.

 

Tim Homer - Lead Engineer

Desert Data Recovery

t...@desertdatarecovery.com

www.desertdatarecovery.com

 

From: datarecovery...@googlegroups.com <datarecovery...@googlegroups.com> On Behalf Of Markus Bauer
Sent: Tuesday, June 1, 2021 11:52 AM
To: DataRecoveryCertification <datarecovery...@googlegroups.com>
Subject: Toshiba donor for headswap

 

Hi,

 

would that two drives match for a head swap?

 

--
Data Recovery Certification Group / for issue with google group please email sc...@myharddrivedied.com
---
You received this message because you are subscribed to the Google Groups "DataRecoveryCertification" group.
To unsubscribe from this group and stop receiving emails from it, send an email to datarecoverycertif...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/datarecoverycertification/c49cc411-9503-460a-8f43-a618803b0600n%40googlegroups.com.

[wezi chiweta]

head swap is fine but thats all nothing else

  Wezi Chiweta

  Director
  Chiweta Data Recovery Technologies
  +265881383038

To view this discussion on the web visit https://groups.google.com/d/msgid/datarecoverycertification/017701d7571a%241b5a06d0%24520e1470%24%40desertdatarecovery.com.

[Markus Bauer]

Hi. I did the headswap and it went smooth but the head was just knocking. Then I had the PCB in suspition because I had various troubles to backup the ROM, so I swaped the ROM-IC on the PCBs and tryed it with the donor PCB. It was not coming on at all (rainbow in the status leds). I also gave the PCB also time to cool down before I started it.

I swaped the ROMs back and the patient PCB and connected it to MRT without a disk - rainbow again! 

It ested the PCB - no power. I found a blown fuse, got the ROM-IC of, replace the fuse with a solder blob and tested if i have 2.6V on the ROM and some voltage in some other ICs. I place the ROM back and soldered it in place. Test - rainbow again.

So I build all back - donor ROM onto donor PCB, donor head back into donor HDD and the donor HDD works perfectly fine - comes ready right away, read SA, read userdata. 

So I guess the matching was not good - maybe I will need a AZA ... drive and the AAE ... was not close enough. Or you think the issue could be just the PCB and the ROM? I soldered a lot of them and I usually build all back after a DR and I had not one ROM failing since I where training my soldering skills. 

Should I try to replace the PCB and give that donor head a 2nd chance or should I better get a whole drive and swap PCB and head?

I inspected the soldering and there where no bridges so what could blow the fuse? That is one of the cases which make me question my skills but on the other hand I dodn't harm the donor at all. 

[Data Recovery Guru]

After baking up donor ROM, solder donor ROM on patient PCB and test on donor drive. If the drive works, then the problem is with the patient's ROM (this also confirms your repair was good).

To view this discussion on the web visit https://groups.google.com/d/msgid/datarecoverycertification/2705e344-42ae-4659-9186-5c14df26e918n%40googlegroups.com.

[Markus Bauer]

Yes, must be the ROM IC. The patient PCB with donor ROM comes ready and identifies. 

[Data Recovery Guru]

There it is... now we have clarity.

To view this discussion on the web visit https://groups.google.com/d/msgid/datarecoverycertification/10cc5541-bab5-4b2f-9a8c-cfc04df2627cn%40googlegroups.com.

[pbzcbf...@gmail.com]

I believe I can verify the patient ROM, if you can upload it.

[Markus Bauer]

That would be nice! 

[Markus Bauer]

But I am still not sure if the ROM was the only issue because the head did not read before I swapped the boards. Maybe I should really go with another donor which match also the AZA ...

[pbzcbf...@gmail.com]

I compared your ROM against a dump uploaded by "pikus" in another forum. The code sections are identical. There are differences in the CP section, as is to be expected.

I have attached the CPs that I have been able to extract with my software. They all appear to be OK. There are a few non-zero checksums, but they are false negatives (pikus's CPs have the same false negatives).

In short, I can't see a problem with your ROM.

[Markus Bauer]

Thanks!