Good morning. I have a Toshiba1.8" drive a customer brought me from a Sony camcorder. The specifics on the drive are:

MK4009GAL HDD1682 H ZR01

I can find drives that match everything but the ZR01. All of the drives I have seen have ZL01. Is this a firmware specification? Do I need to
match it if I am taking chips off the original and putting it on the donor?


Thank you,

Philip Shaw

What is your primary goal?

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The drive I received is getting no power. I removed the TVS diodes but that didn't help. I would like to move the NVRAM chip from the customer drive to the donor and see if that works. I have tried this once but the customer drive had ZL01 and the drive I had had ZR01 and I am not sure if that is why it didn't work. There is very little documentation that I could find so I moved the two 8-pin chips over. I am wondering if I need to move one of the other chips instead.


Thanks,

Philip Shaw

No external ROM on these drives

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I was thinking it was the BGA chip with the M on it. Does that sound correct? No fun to change that one.

That doesn't sound right. AIUI, your drive has a single 3.3V supply, in which case it would probably only have one TVS diode, if it has any at all.

Could you show us a photo of the board?

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