PC-3000 Forum

Hi Everyone,

Ihave a little problem....

Patient:
Samsung SP0802N,
1 plater, 2 heads
P/V : FS
Rev. E
PALO

(Disk was a few monts ago in my hand - i have modules SA
Now, i have this hdd again)

Disk stuck.

I have donor - practicaly identical (model, FS, map heads).

I was heads swap - disk stuck 8 match and down motor. After this operation, disk not detected. Below data from terminal:

SpnOk
DAC:-00149
H: +00000
SK C: 0000E9E3
AP_TO
C: 0000013B H: +00000
DAC:+00000
UF: Seq Sk err
H: +00001
UF: 1. 1st Gray err
H: +00000
SK C: 0000E765
AP_TO
C: 00000135 H: +00000
DAC:+00000
UF: Seq Sk err
H: +00001
UF: 1. 1st Gray err
H: +00000
SK C: 0000E667
AP_TO
C: 00000137 H: +00000
DAC:+00000
UF: Seq Sk err
H: +00001
UF: 1. 1st Gray err
H: +00000
SK C: 0000E78C
AP_TO
C: 00000134 H: +00000
DAC:+00000
UF: Seq Sk err
H: +00001
UF: 1. 1st Gray err
ENG>SRV>
When put original heads back to donnor all is ok (with native PCB or PCB from patient)

I was try hot swap - disk stuck still - no communication...
What i can do it ?

Thanks for all constructive solution..

Igen

Hi,

I suppose that heads are clicking when you power on the drive.
But after they knock a few times, doesn't the drive go into ready state?

Thanks DataLabAce for quick answer.

No, after they knock a few times, this drive doesn't into ready state (self). Just stop motor and still busy. However, when I run the utility with parameters "soft reset" disk run ready state (DRD & DCS). The motor stil not work, but the first detect is almost corect (corectly show model, FW and capacity - without sn.). After start further utylity hdd show (motor even durning try read SA still off):




Thanks for further idea..
Igen

Hi igen
i have reached success sometimes in such situation
try to perform hot swap after head exchange
you can find the information on how to perform hot-swap for samsung palo by searching in this forum
-BR-

Maybe you have damage to ALIST? this can sometimes cause knocking and sropping of spindle. Perform hot swap and check SA, I think ALIST modules may be defective

I have written already, that i I tested try hot swap after head exchange. I have good copy SA (have older backup SA from this disk, when disk was OK), and i'm sure, that have made hot swap corectly - rewrite on donor folow modules (from older backup SA):

"06 CONFIG"
"10 SLISTHDR"
"11 SLIST"
"12 TLIST"
"13 ALIST"
"5D CONFIG2"

Please, continue soultion, mayby any new ideas...

Thx, IGEN

What happened after hot swap? The disk stop spindle again?
Try to add "62 ALISTHDR" to donor before hot swap
-BR-

After hotswap done, motor start and click, click, click..... many, many times...

62 ALISTHDR is not present in original list SA (from this disk, in my old copy)

thx
igen

In your case I would try to perform head swap another time using a different donor, offcourse matching P/V=?X
If it does not work, then I would consider this hdd unrecoverable

I was heads swap - disk stuck 8 match and down motor.

I believe you mean that after head swap procediment heads are knocking 8 times than stop spindle motor
If that is right, there is a good chance of head or pre-amp incompatibility

-BR-

Hi,

This is alignment related problem. Either use another donor, or work around the head alignment issue.
With samsungs only these 2 head models have alignment issues, bigger ones work well with donor MHAs, never experienced such problem.

pepe

Hi,

This is alignment related problem. Either use another donor, or work around the head alignment issue.
With samsungs only these 2 head models have alignment issues, bigger ones work well with donor MHAs, never experienced such problem.

pepe

Hi,

How does one work around such head alignment problems?

Regards
Joel