Seagate Barracuda LP ST31000520AS (1Tb)

[Jarvis]

Hi everyone,

I have that Seagate disk that does not spin anymore. I removed the PCB and saw that the two resistors at the very right side, near the power supply connector, are burnt. Details of the drive are as follow:

S/N: 9VX0670F
P/N: 9TN154-510
Firmware: CC32
Date Code: 10065
Site Code: TK

In the other hand, I have another (but working) drive: Seagate Barracuda 7200.12 ST31000528AS

S/N: 9VPAVPD8
P/N: 9SL154-303
Firmware: CC46
Date Code: 11237
Site Code: TK

As PCB's looked identical, I swapped them but I was not optimistic. Of course, I was right not to be... The drive started to spin, clicked for a few seconds and then spinned down (exactly like tgrans21's explanation).

What are the possible solutions ? Would it be possible to "bypass" those two burnt resistors ?

Many thanks in advance.

[Jarvis]

By luck, I have found another Seagate Barracuda LP ST31000520AS:

S/N: 5VX09TXY
P/N: 9TN154-510
Firmware: CC32
Date Code: 10064
Site Code: WU

I swapped the PCB's. The disk starts, clicks for a while (in another way), then continues spinning. But it's not detected by the BIOS.

Could I expect something with the "LBA 0" trick ? I thought it could make the drive detectable again in order to duplicate it with ddrescue.

Again, many thanks in advance for your advises.

[harddrivespecialist]

You have to transfer ROM chip from original PCB to new one in order to make your drive work.
That chip contains unique microcode to your drive.

[pcimage]

Harddrivespecialst is correct, all PCBs on this series are absolutely unique.

[Jarvis]

Right. The problem is that I do not want to destroy any of those two working disks. Is the soldering iron the only solution ? Is there no way to flash the drive as suggested there ? (I guess you will tell me that ROM is not EEPROM...)

Is the ROM the 8-pin chip on the top or on the left ? (On the top-right, you can see the burn area.)

Many thanks.