ST9750422AS

[unknown]

Hello,
Drive in topic clicks 3 times the continue spinning.
Terminal output:

EarlySpinup Enabled
Rst 0x10M
ASCII Diag mode
ExecuteSpinRequest
LED:00000067 FAddr:00380338
LED:00000067 FAddr:00380338
LED:00000067 FAddr:00380338

Tried to short read channel no luck
Booting from H1 no luck
Heads replaced no luck


Any suggestions ?
Thanks in advance

[SWM]

I'm not a DR guru. But while the gurus are silent... The error indicates that there's garbage in memory instead of the overlay.
I don't know if MRT or PC3K can load the loader from boot mode. The loader itself is here in the files. Or hot swapping... but, that's dangerous.
https://files.hddguru.com/download/PC-3 ... S049MW.rar

[unknown]

I appreciate your reply, SWM.

Here's the patient and donor rom copies :

Attachments

Donor_ROM.rar

(428.73 KiB) Downloaded 11 times

Patient_ROM.rar

(428.72 KiB) Downloaded 11 times

[SWM]

The ROMs are identical, except for the adaptive modules, of course. They were released in January-February 2011. The adaptive module checksums are normal.

Unfortunately, the ROMs in this resource (https://files.hddguru.com/download/PC-3 ... S049MW.rar) are not compatible.

Last edited by SWM on November 29th, 2025, 9:40, edited 1 time in total.

[unknown]

The ROMs are identical, except for the adaptive modules, of course. They were released in January-February 2011. The adaptive module checksums are normal.

Thanks for confirming that.

I can reach terminal after shorting read channel but it clicks and gives LED error again if I try to issue any command.

[SWM]

Well, I already wrote that you don't have a diagnostic overlay loaded into memory. A limited number of commands are available in this mode.
I don't know if your tools allow you to load overlays into memory and create a loader. It can be created from the donor's resources.
Is the patient's ROM native? Part Number 6WS08VS3A match the label?

[unknown]

I don't know if your tools allow you to load overlays into memory and create a loader.

Only via termial. (MRT)

Is the patient's ROM native? Part Number 6WS08VS3A match the label?

Yeah, matched.

[SWM]

Donor drive is dead? SA not reading?

[unknown]

Donor drive is dead? SA not reading?

Donor working normally after swapping heads between the two drives.
Both SA and UA are reading fine in donor drive.

[SWM]

Is it possible to create a loader on a donor in MRT and look at it?

[unknown]

The customer decieded to take the drive as I exceeded the time for recovery.

Thanks a lot, SWM.
I do really appreciate your kind help.

[SWM]

You're welcome. I'm glad. It would be too much trouble to insert the patient's adaptive modules into the donor's loader.
And then to see the patient’s SA not working (especially the translator).