Maxtor Grizzly Head Map in ROM?

[HDD Spaz]

Hi Guys.

Working on a Maxtor Grizzly 6h400f0. PCB is fried. I changed pcb with a 500 Gb Grizzly, same pcb code. Disk detects fine, sounds perfect, but no sectors can be read. (MHDD - !x0!x0!x0) I'm thinking there is head map in rom?
Can someone help me identify the rom chip on these drives, theres 5 8 pins chips.

Also if I'm wrong about this then please let me know, the other likely problem is a corrupt translator.

Thanks

[BlackST]

Do the Rom code match?

[HDD Spaz]

Is rom code on pcb? I only have a pcb (got it off ebay)

[BlackST]

Rom copy on the Sa and pcb (I mean the rom actually in your pcb)

[HDD Spaz]

Ok, now I understand.

am i right in thinking ROM copy in SA can be safely written to PCB? Save me getting out my hot air gun.

[BlackST]

Never did on Grizzly, on Calypso and Sabre is possible. Before all, check translator. As the pcb is fried, maybe a partial failure of the preamp is possible, too. Don't know about pcb compatibility between 400 and 500 gb. But if label match, this is 75% good.

[HDD Spaz]

thanks for the top advice again.

[HDD Spaz]

AH, back to square one. My tools don't support this drive. I was planning on using SD HD Doctor, seems like they havent bothered updating it for ages.

Anyone know which chip is the rom chip on a maxtor grizzly pcb?

[beto]

U can unsolder the serial ROM, and solder on un donnor , post us here the picture from u PCB HDD Spaz,

Regards

[HDD Spaz]

Sorry about the pic, just took it on my mob.

Attachments

Grizzly PCB

[ccc]

I think this one is

Attachments

[HDD Spaz]

Thanks. Everyone else agree?

[N.C.]

Thanks. Everyone else agree?

I have no similar pcb in hand, but if you post the numbers, i can easily select for you.
Now i have 3 votes:
The one, wich was markbed by ccc, the closest to the Q501, and the one wich is on the MCU left side.
(The others can't be by the pcb's connections....)

Janos

[BlackST]

Can you read the marking on the ICs and post ? Beside this (external ROM), there is code IN the MCU (the big one). External ROM is for patching. Way of working similar to serial Calypso for the drive itself.

[drc]

I just got a similar drive in. That is indeed the ROM. The one on this drive is a 25VF010.

[HDD Spaz]

I just got a similar drive in. That is indeed the ROM. The one on this drive is a 25VF010.

thanks for the confirmation. I'll let you know how I get on.

[BlackST]

Confirmed 100% it's the external flash (SPI)

[guru]

Those Sony K750i's take a decent picture :O) Must swap my paper cup and string