Rosewood PCB swap to test HSA compatibility killed donor?

[LarrySabo]

Working on my first Rosewood case and swapped patient PCB with donor HDA to see if donor would spin, implying HSA would likely be compatible. That was probably foolish, given the Rosewood tech nightmare. Anyway, the swap seems to have killed my donor, as explained below. Anyone else tried this with similar results?



1. Scanned donor with HDDScan for 100 million LBAs
2. Removed then re-installed ("RnR") donor HSA in donor HDA
3. Scanned donor again with HDDScan for 100 million LBAs
4. Speed profile substantially unchanged (see below)
5. SMART before and after RnR substantially unchanged, so swap was successful
6. Installed patient PCB to donor, powered on but doesn’t spin, so heads not compatible
7. Installed donor PCB to donor, powered on: doesn’t detect in Windows
8. Connect donor to SRP-ST, calibrates but scan shows all ERR and ABRT
9. Restore donor original ROM from backup: no change
10. Looks like swapping patient PCB to donor HDA kills donor

 

[Jared]

I've not seen this, but I've also not tried this. Perhaps the donor PCB was just really messed up and sending too much voltage to the preamp? Or it's a totally different preamp that perhaps operates at a different operating voltage??? I don't know.

i guess the only way to be certain is to buy two good ones, swap the PCBs, swap back and see if it happens again.

 

[jol]

can you post the terminal log ?

 

[LarrySabo]

Jol, it's "Boot 0x80M" followed by 22 of the following. I just realized the drive is not even spinning, at any time after power-on. It sure seems like the heads are toast.

 FAIL  Servo Op=0100 Resp=0003

 0100 0000 0000 0001 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
 ResponseFrame 0017 1705 0021 0000 0000 044B 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0004 Loop=0029

 

[LarrySabo]

[post]10195[/post] Perhaps the donor PCB was just really messed up and sending too much voltage to the preamp?

it would be the patient PCB that would have fried the donor heads. There was no point putting the donor PCB to the patient, because it clicks as received (because it likely has bad heads).

 

[LarrySabo]

Ha, mystery solved! When I re-sealed the drive with Kapton tape after the RnR, I accidentally covered one spindle motor contact. No wonder it wouldn't spin up. Cleared that and it spins up fine. Phew! Thanks to Jol for the suggestion to try it with the HDA connector isolated. It was after double-checking that the spindle motor contacts were good that i discovered the cause of the problem. Thanks, Jol!

 

[Jared]

[post]10202[/post] it would be the patient PCB that would have fried the donor heads.

Yes, I mistyped that. I was thinking "patient PCB" but typed donor for some stupid reason.

Glad to hear you solved your mystery.

 

[LarrySabo]

[post]10205[/post] Glad to hear you solved your mystery.

Thanks, Jared. I was able to read and save the patient's modules but unable to disable background processes or read anything in the user area. I guess 5 months difference in DOMs is just too great. I can't get the patient to calibrate again but the donor heads work perfectly after re-installation in the donor. I'll have to check the patient heads for contamination before ordering a closer-matching donor, which the customer is not averse to paying for in spite of the $205 CAD price.

 

[Amarbir[CDR-Labs]]

Well Mr Larry ,
If these heads did not work in your patient i presume others even the best matching once would fail

 

[LarrySabo]

We'll find out when the new donor arrives. I sure hope they work but I'm doubtful. The drive was sent to another DR lab and it wouldn't surprise me if they did something to make recovery by someone else impossible. The fact that the donor could not be unlocked gives me some hope that a new donor will have better success. I'm an optimist.

PS: The heads worked well enough to read and back up modules but not to update congen. I also can no longer get the drive to calibrate with the same donor heads that worked earlier.