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Hello there I have a *.vhd (generated by Windows) that I'm trying to use in Boch but I don't know how to find the geometry.

The VHD is exactly 134218240 bytes large.

The following values is what I gave Bochs:
Cyl: 260
Heads: 16
SPT: 63

Boch complains that these values are incorrect. However I do not know how to find disk geometry properly, I got this values by using bximage to create a 128MB image (but the size is off by 0.03MB of the Window's image)

So my question is how do I find disk geometry properly?

RTFM - Bochs doesn't support VirtualPC images as of yet.

(but the size is off by 0.03MB of the Window's image)

VHD images have metadata as well as the actual binary data. You need to use something like qemu-img to convert from the VHD file to a flat binary IMG file.