[Bug 236786] FreeBSD -.iso files not support written to USB drive

From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 28 Jun 2025 08:12:47 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236786

--- Comment #5 from Graham Perrin <grahamperrin@gmail.com> ---
Re: comment 0, I can't guess what was wrong in that case. 

Secure boot enabled, maybe?

I do frequently boot from hybrid image files – with EFI enabled (and secure
boot disabled) – in VirtualBox, without difficulty. The first screenshot at
<https://www.reddit.com/r/freebsd/comments/1lmg9n5/freebsd_installer/> was of: 

FreeBSD-15.0-CURRENT-amd64-20250626-dca2ab32e831-278235-disc1.iso

Similarly, never a problem for me with disc-oriented .iso files written to USB
memory sticks and used with real hardware (OT: I can no longer use USB devices
with VirtualBox), although I might never have tested the two that were
mentioned in comment 0.

See also: 

<https://codeberg.org/grahamperrin/freebsd-doc/issues/54>

> FreeBSD Handbook: installation: misdirection to use optical media (AMD64)

> Generate hybrid ISO images for amd64. … (2018-04-17) was on the 
> release/12.0.0 branch.

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