On Sat, Aug 30, 2025 at 10:19:03AM +0900, Henry wrote: > I'm wanting to install 10.1 amd64 onto an older machine that can't > handle efi. Is there a cookbook, step-by-step instruction page > somewhere to put the image on a mbr format usb? I only seem to be > able to put the image (NetBSD-10.1-amd64-install.img.gz) on an efi > format usb. > > I apologize for my slowness. Age is catching up; that's for sure. > TIA netbsd community.
If I understand your situation correctly, I think you simply want to use the mbr-style img rather than the other one; reference: https://cdn.netbsd.org/pub/NetBSD/NetBSD-10.1/amd64/INSTALL.html#Quick%20install%20notes%20for%20the%20impatient ... scroll down a bit to the part in the doc describing the boot images: "Note the amd64 architecture has two images, NetBSD-10.1-amd64-install.img.gz and NetBSD-10.1-amd64-bios-install.img.gz. The latter is intended for older hardware which is unable to boot using a hybrid MBR and GPT image." In your case, I think you'd use NetBSD-10.1-amd64-bios-install.img.gz for USB boot media. There are uncompressing and dd'ing notes in that same INSTALL doc, plus an overall walkthrough for the sysinst procedure. Cheers, sr.
