Arch Linux installer ISO — ZFS-on-root or BTRFS, doubles as rescue disk https://git.cjennings.net/archangel/atom?h=main 2026-04-22T01:10:01+00:00 2026-04-22T01:10:01+00:00 Craig Jennings c@cjennings.net 2026-04-22T01:10:01+00:00 urn:sha1:11af802af31b69e8e478baae3ea6e5b5090bafaf On ZFS-on-root, statx() across sibling services' /var/tmp/systemd-private-*/tmp mounts returns errno 132 (ENOTNAM). This produces 10-30 journal errors per boot and causes systemd-tmpfiles-clean.service to fail every periodic run (exit 73 / CANTCREAT). Running tmpfiles inside its own mount namespace avoids traversing sibling private-tmp paths. install_zfs() now calls configure_tmpfiles_private_tmp() between configure_zfs_tools and sync_efi_partitions, so the genesis snapshot captures the drop-ins. Btrfs path is untouched — errno 132 is ZFS-specific. The drop-in file-writing is factored into install_dropin() in lib/common.sh (service, name, root; body from stdin). Six bats tests exercise path, content, directory permissions, idempotent overwrite, empty content, and special-character preservation. Full root-cause write-up and verification steps in docs/zfs-tmpfiles-private-tmp-fix.md.