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>
Debian/AlmaLinux/Fedora image filenames, URLs, and checksums were
hardcoded to arm64/aarch64 (for Apple Silicon macOS), which would
silently download the wrong-architecture image on an Intel/amd64
host. Detect the architecture from the host (uname -m), normalized
to arm64/amd64, with VM_IMAGE_ARCH as an override; the run-*.sh
scripts in the parent repo use the same override so both stay in
sync. amd64 keeps the previously pinned checksums; arm64 checksums
are still unpinned pending upstream publication.
windows11 is unaffected: it stays x86_64-only, matching run-windows11.sh.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
guofangandClaude Sonnet 5.5