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Data recovery and disk repair questions and discussions related to old-fashioned SATA, SAS, SCSI, IDE, MFM hard drives - any type of storage device that has moving parts
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Invalid geometry after pcb swap

January 6th, 2018, 9:12

WD hdd has 771959 sata board and works perfectly. Trying to test a 771962 usb board coming from a faulty drive (all heads gone). The sata hdd with the usb pcb is detected in device manager but fails to show up in disk management. Victoria says invalid geometry and 0 size. Can somebody explain why this happens and how to fix geometry?

Re: Invalid geometry after pcb swap

January 6th, 2018, 12:59

Did you move ROM chip/content from older SATA to newer USB PCB ?

USB PCB might want to "encrypt" your drive and might be looking for keys either on SA and on drive tracks and of course will not find any as drive was SATA native (without encryption). Your encryption bridge chip on the new USB only PCB might need to have valid keys so that the PCB would work and encrypt/decrypt on the fly. Maybe you can figure out a way to generate those keys/sectors/modules.

Or maybe the problem is elsewhere like broken PCB ...

At any rate you shouldn't be using the USB PCB to start with as SATA is more reliable and if you need encryption use something like a TrueCrypt software (or newer alternatives to it) with a full drive encryption option ...

Re: Invalid geometry after pcb swap

January 17th, 2018, 5:00

771962 pcb has a different controller chip than 771959! This way these two pcb's are not compatible.

Re: Invalid geometry after pcb swap

January 17th, 2018, 12:19

The matching board for 771959 is 771494. However as Spildit says you need to swap the ROM and it may not work due to encryption. I have never tried this the wrong way round (swapping SATA with USB) so let us know how you get on.
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