rootfs-disk-images

Bootable root filesystem disk images for microsandbox/libkrun experiments and examples.

These images are different from the tiny data-volume images in superradcompany/disk-images: files in this repo are intended to boot as the sandbox rootfs.

Images

File	Architecture	Format	Filesystem	Virtual size	SHA-256
alpine-aarch64.ext4.raw	aarch64	raw	ext4	64 MiB	d708d8e5e4c505c38ddc3d4ca17cb48b5b15b5b6acb23a6bfb91e5d4f19d3ceb

Provenance

alpine-aarch64.ext4.raw was converted from the microsandbox Alpine qcow2 root image at superradcompany/qcow2-alpine commit 6cd6112f976a8fe70c4020a5d5557e8b519c66ef.

Conversion command:

qemu-img convert -f qcow2 -O raw aarch64.qcow2 alpine-aarch64.ext4.raw

Validation

The aarch64 raw image was validated on macOS arm64 with the microsandbox cold-minikernel worktree as a root disk and successfully executed /bin/true.

In the 2026-06-14 cold-start benchmark, this image reached 64.1 ms median host create-to-ready, 12 ms median guest boot, and 38 ms median guest-ready across 9 fresh cold VMs.