QEMU's emulated USB CD-ROM reads the Windows ISO at a few MB/s. The script
builds a bootable FAT32 GPT disk image from the ISO, splitting install.wim into
install*.swm parts for the 4 GB FAT32 file limit, so the image can be attached
as an NVMe disk and read about 15 times faster.
It runs on macOS and Debian. The ISO has to be read as UDF: hdiutil on macOS,
mount -t udf as root on Linux, otherwise udisksctl, otherwise 7z extracts it.
A desktop session automounts the loop device that udisksctl creates, so the
existing mount point is reused when there is one. The image itself is built
without root.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
