I need to swap a ROM chip on this board. The chip on the right is marked with a 25, but does not look like a standard ROM chip. The chip on the left does look like a standard ROM chip, but is not marked with a 25? Will the real ROM Chip please stand up?

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HDD, SSD, Flash and RAID Data Recovery
Founder of The Data Recovery Professionals Group

Pretty basic stuff.

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Buy your friends Toshiba\Hitachi and your enemies Seagate.

Thanks for your help thatdellguy. Hiding where you are from and not giving useful information must fill up your day. I agree it is pretty basic stuff and I think I know the answer, but when I am dealing with clients data I want to be sure.

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HDD, SSD, Flash and RAID Data Recovery
Founder of The Data Recovery Professionals Group

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Buy your friends Toshiba\Hitachi and your enemies Seagate.

Tell us the markings on the chips and someone will identify them for you.

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A backup a day keeps DR away.

I think the board has been resting on something as the numbers are a little worn, this is the best I can do.
The chip on the right is 25FV101T 1BA1A
Chip on the left is S93C6 6D22 4365
Thanks

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HDD, SSD, Flash and RAID Data Recovery
Founder of The Data Recovery Professionals Group

It sounds silly when I say it, but S93C66 is the "NVRAM", while 25V101T is the "ROM". In fact neither is a ROM and both are NVRAMs.

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A backup a day keeps DR away.

I think that's what has been confusing me. I know on this Hitachi its the NVRAM I need to swap (according to Donor Drives). Many thanks for the help. Much appreciated.

_________________
HDD, SSD, Flash and RAID Data Recovery
Founder of The Data Recovery Professionals Group

This one is getting a little more complex. I have swapped the NVRAM over and the drive is still not powering up. The board does comes DRD and I can read the NVRAM. The drive does however power up with the donor board and the donor NVRAM??

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HDD, SSD, Flash and RAID Data Recovery
Founder of The Data Recovery Professionals Group

Could you upload the donor and patient NVRAM contents? Could we also see the ROM firmware?

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A backup a day keeps DR away.

I will get this to you tomorrow. I have another drive on the PC3000 I don't want to stop. Many thanks for the help.

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HDD, SSD, Flash and RAID Data Recovery
Founder of The Data Recovery Professionals Group

Go into "utility status" in UDMA, and you'll probably see the NVRAM and ROM differ in version.

If you haven't matched the first two lines if the PCB sticker, then you'll more than likely need to swap the "ROM" chip over too.

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PC Image Data Recovery
http://www.pcimage.co.uk

New!! HDD-PCB.COM for all your PCB and donor HDD requirements!

ROM ID AF0C
ID 6642887D
NVRAM ID VA4OA50K

Sorry its taken a while to get back to you. Had an Emergency RAID last night.
ps. The first two sticker number do match.

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HDD, SSD, Flash and RAID Data Recovery
Founder of The Data Recovery Professionals Group

The plot thickens.. Although I ordered a particular donor board, I received a different board. It is the same family and revision, so the board does need a swap of both chips. However after completing the swap, the drive does not come DRD. After I swapped the NV-RAM chip, the board came DRD but would not read data, presumably because we needed the ROM chip swap. After also swapping the ROM chip, the drive stays BSY and will not spin up. So I am assuming a corrupt ROM chip. Any advice would be appreciated.

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HDD, SSD, Flash and RAID Data Recovery
Founder of The Data Recovery Professionals Group

Thanks for everyones help. We did get the data back for our client. It seems that the donor board we purchased was not working correctly. We got the right board, swapped the NV-RAM and got the data. Once again thanks.

_________________
HDD, SSD, Flash and RAID Data Recovery
Founder of The Data Recovery Professionals Group