scripts/write_stick.sh refuses a device that is not a whole, removable USB disk, that holds the
running system, that is smaller than the image, or that has a mounted partition (it prints the
udisksctl lines); shows the stick and asks for its name typed back; writes with conv=fsync,
flushes, reads the stick back and compares it with the image byte for byte; powers it off. On
Windows/macOS it points to balenaEtcher or Rufus. Captain Bob, 2026-10-28, after a terminal line
break dropped dd's bs=4M conv=fsync on the first SER5 stick.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
