Plate swap

[irwinwinkler]

Hello!
Please, could you advise me if I changed the plates to the donor drive, do I have to use rom with donor or rom with patient drive?

now I have it like this:

Patient drive servo and heads BAD: Donor drive:

Plates remove to donor drive Plates from patient driver

PCB patient PCB donor
ROM patient ROM donor
Heads patient Heads donor


is ok?

[BGman]

If you do expect any positive anser, you should post the model of your HDD at first place.

[irwinwinkler]

BGman, Model is ST 35000320AS 7200.11

[pepe]

Data recovery does not really work like that. This is not a DVD drive you just swap the disc and watch the movie.
Whatever the model is, the solution rarely begins with a platter swap. It is just not neccessary in most of the cases, moreover many models are sensitive to alignment which is ruined now for sure.
What do you usually do if your car has transmission problems? (assuming you are not a car mechanic)
You should do the same with this disk...

pepe

[irwinwinkler]

pepe, Hello, the servo is really inoperable and the heads were destroyed I tested it on pc3000 express, therefore i had to put them in donor drive.

[ddrecovery]

pepe, Hello, the servo is really inoperable and the heads were destroyed I tested it on pc3000 express, therefore i had to put them in donor drive.

What do you mean by the 'servo is inoperable'? Do you mean the motor?

[pepe]

destroyed heads do not require a platter swap. Now your alignment is probably lost, which will cause a bunch of problems.
I can realign them and recover the drive if needed.

pepe

[irwinwinkler]

The resistance between the individual contacts is immeasurable, the servo did not rotate. Servo is real damage!!!

[irwinwinkler]

pepe, Hello, the servo is really inoperable and the heads were destroyed I tested it on pc3000 express, therefore i had to put them in donor drive.

What do you mean by the 'servo is inoperable'? Do you mean the motor?

yes motor

[ddrecovery]

Okay so the motor has failed.
I guess it is locked solid?
Have you removed the platters from the patient yet?

[fzabkar]

According to this database, at least one 4-platter 7200.11 model (ST31500341AS) is tolerant of platter misalignment:

https://www.recoveryforce.com/forums/viewtopic.php?f=6&t=565

[pepe]

according to my experience it is not 'that' simple. There are several models on that page i would not list there, like Hitachi VLAT, 3.5" seagates.
saying this with the background of knowing what the problem is.

pepe

[irwinwinkler]

Okay so the motor has failed.
I guess it is locked solid?
Have you removed the platters from the patient yet?

not yet, my question is : rom from patient pcb to donor pcb, or donor pcb (rom) use?

[ddrecovery]

So ONLY if the motor has failed do you need to swap platters.
And ONLY if you have the experience to do this and a Class 100 (or equivalent) cleanroom.
Platter alignment is critical on most HDDs.
If you transplant the platters to the donor HDA, you need to use the patient PCB with ROM, no need to swap anything.

[pepe]

It's clear you have very little experience in DR, seagate hdds in general, yet doing platter swaps... on client disks...
Sorry, but you should know by now that seagate F3 drives will NEVER work with any other ROM than their own.
But: now i think i got a better understanding of your posts and saw that patient platters are not yet removed. That's a good thing. I recommend not touching it then if you have no experience. Outsource the job and practice on donor drives.
pepe

btw, we call the motor spindle or spindle motor (not servo, which stands for the head positioning system that controls the spindle speed as well. By dead servo we usually mean that either the servo sectors are critically damaged on the platter or the heads are bad enough not being able to read them. Such problems result in Servo Fault messages in terminal.

[pcimage]

Okay so the motor has failed.
I guess it is locked solid?
Have you removed the platters from the patient yet?

not yet, my question is : rom from patient pcb to donor pcb, or donor pcb (rom) use?

With obviously so little knowledge, you are attempting something a) Very difficult even for some pros and b) maybe unnecessary.

This can only end in disaster with the permanent loss of data (yours or whoever poor sod this drive belongs to).

[lcoughey]

according to my experience it is not 'that' simple. There are several models on that page i would not list there, like Hitachi VLAT, 3.5" seagates.
saying this with the background of knowing what the problem is.

pepe

Cloning an ST31000333AS (7200.11) with 3 platters and 6 heads after doing a platter swap. Platters pulled and placed onto donor spindle one at a time, with a stand as the intermediary location. Kept original heads and PCB.

All heads are reading with speeds fluctuating up to 100MB/sec and an average speed of 12MB/sec. Out of almost 782,000,000 sectors read, thus far, I've only got about 260 bad sectors reported and 875,000 skipped during this first pass.

As for the VLAT posted on my forums, I see that the user who reported it also only got about 1/3 of the sectors, which would imply that there were likely only able to read the one platter. So, for that one, and any others that aren't more accurately confirmed, I'm moving down to tried with poor results.

[pcimage]

The ST31000333AS results surprise me, but happy to take your word on it

[fzabkar]

Would the alignment behaviour be dependent on the firmware? If so, then that could explain different experiences with the same model.

[pepe]

It might be luck as well, and the method Luke used might have helped it too, but as you can see, the reading speed varied largely, so it could have been much worse too. Also, in my understanding it was a single case, while I have done countless cases and with my method the reading speed was top on all heads (where there were no surface issues of course).

pepe