Help needed - IBM Deskstar 07N8084 - Clicking noise

[pelle2005]

Hi,

I have a IBM 07N8084 82GB IDE disk from DEC-2001 which I need some help with. There is a clicking noise after the disk has spinned-up. It's probably the heads that can't be synced against the tracks. I have done head and pc-board replacement twice and I don't think that is the problem. I think I managed the replacement due to following

A = Faulty disk
B = Spear part disk 1
C = Spear part disk 2

Heads and board from disk B to A -> No difference
Heads and board from disk C to A -> No difference
Heads and board from disk B to A to C -> Disk C working.

So the heads from disk B has been moved to disk A and then moved to disk C. Moving heads twice did not damage the heads so I think that operation was successfully done.

It must be something else that cause the heads to not sync (stop the clicking head moving sound). Can I test something else. I read on some other threads that there is a control track with internal data, can a damage control track cause the sync failure.

I have not run any diagnostic software or other tool. Only test I'm doing is power on and If quiet connect the disk by a USB adapter.

/BR
Pelle

[pcimage]

What are you swapping the board as well? I assume u mean the PCB?

The PCB matches the firmware on the platters, not the heads.

[pelle2005]

Hi,

Yes, I moved them in pairs, heads and PCB board.
So if I understand you right I should bring back the original PCB board and see if it works.
Are there any option if the original PCB board is damage?

In another thread they where talking about hot-swapping PCB's during spinning disks.
What is the relation between the 3 things, heads, PCB and disk (Service Area I think it's called).
Is the firmware stored on the SA track or is it just various persistent information like status, bad sectors, ect. please fill in, (if you like), my lack of understanding how a disk's software actually works.
Can the disk be in a mode which can be fixed with a special program (PC3000), i.e. resetting any flags, reinitialize anything?

I see on the labels that the number '07N8084H325750S21' (doner) and '07N8084H325750P1C' (target) differ!

/

[pcimage]

Yes, use the original PCB.

If the original PC is damaged, you must copy the NVRAM to the donor PCB, to ensure compatibility.

[pelle2005]

Have now tested by rotate the PCB 4 times among the 3 disks:

Disk A target.
Disk B donor 1.
Disk C donor 2.

Current state

Disk A - PCB C -> clicking sound
Disk B - PCB A -> clicking sound
Disk C - PCB B -> OK

rotate...

Disk A - PCB A -> clicking sound
Disk B - PCB B -> clicking sound
Disk C - PCB C -> OK

rotate...

Disk A - PCB B -> clicking sound
Disk B - PCB C -> clicking sound
Disk C - PCB A -> OK

rotate...

Disk A - PCB C -> clicking sound
Disk B - PCB A -> clicking sound
Disk C - PCB B -> OK

rotate back to current state

Disk A - PCB C -> clicking sound
Disk B - PCB A -> clicking sound
Disk C - PCB B -> OK

All PCB's works on disk C.
Should I still try to copy NVRAM?
Disk A (target) has a faster head movment sound then disk B.
Disk B is in a terrible conditions after my practicing on head removment and dust removing tests with clean air.

/

[pelle2005]

Hi,

Is this an option that can fix the clicking noise.
In this thread hard-disk-drive-technology-f13/refreshing-hdd-geometry-llf-is-still-fundamental-t8412.html andrzejw mention that Dmitrij program can remove the click noise by simply refreshing geometry and bad track zero. Just for clearance, is it MHDD and can it be done. Is it a secure operation or can I lose data if something goes wrong...

/Pelle