st500dm002 - Recov Servo error

[Arihant]

I have 7200.12 st500dm002 hdd.
After changing the Heads.
- It Spinup perfectly.
- No clicking noise.
- Detect as 3.86gb (as Pcb mode)
- Motor did not stop. It run continuesly.

- Terminal Output.

Boot 0x10M
Spin Up
RECOV Servo Op=0100 Resp=0005[0x00000000][0x00000000]ZZZZMMMMMMMMMMMMMMMZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMddddddWWWWMMMMMM
FAIL Servo Op=0155 Resp=0007
ResponseFrame 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 000Ax
RECOV Servo Op=0155 Resp=0005[0x00025CB4][0x00025CB4]ZZZZMMMMMMMMMMMMMMMZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMddddddWWWWMMMMMM
FAIL Servo Op=0055 Resp=0007
ResponseFrame 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 000Ax
RECOV Servo Op=0055 Resp=0005[0x0000B319][0x0000B319]ZZZZMMMMMMMMMMMMMMMZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMddddddWWWWMMMMMM
FAIL Servo Op=0155 Resp=0007
ResponseFrame 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 000Ax
RECOV Servo Op=0155 Resp=0005[0x00030FCD][0x00030FCD]ZZZZMMMMMMMMMMMMMMMZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMddddddWWWWMMMMMM
FAIL Servo Op=0055 Resp=0007
ResponseFrame 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 000Ax

I can't access T>

Can We have to update CAR + SAP etc modules in the rom from donor head hdd?
How to recover the data?

Thanks,

[Nick_TS]

Hello,

There is a method you should follow for getting to terminal with shorting. The contacts must be identified properly.
On the most drives reading channel line is crossed with an element, so it is easy to find two lines that go from pads to CPU on your drive board.
You should short the contacts with a pincers when holding a paperclip with it.
Also, the moment to short is before 2nd recalibration. When shorted properly, drive will start to click and then it will stop. At the same time press ctrl-z within terminal window and check if T> is there.

[AJ2008]

It definately looks like some hardware error, are you sure heads are not bad?

[Arihant]

The customer has taken back the hard disk. Now no other analysis possible.

thanks,

[cuumaytinh]

I have same case. Support online of ACE Said "ERROR Media Cache" .

[Nick_TS]

It seems like PCB or heads problem.

Try to swap PCB with ROM transfer.
Else heads swap.

[Imnew]

I have the same problem. There are 2 nos. 8 leg chip. Which one is ROM

[cuumaytinh]

Can try. Reopen PC3000 software or restart the PC. can receive signals Teminal

I have encountered this problem and it has been work

[AJ2008]

It seems like PCB or heads problem.

Try to swap PCB with ROM transfer.
Else heads swap.

Im sure PCB is good, heads maybe are bad but with RECOV error and not FAIL error there is still some options before head change

[Arihant]

Can RRO Mode / slow seek in rom option will help?