Practitioner (own blog/paper) Modernization
Claude Code ports a 25-year-old Linux tape driver from kernel 2.4 to 6.8 over two evenings
Dmitry Brant recovers data from 1990s QIC-80 tapes and needed the ftape driver, abandoned around 2000, to run on a modern kernel. Claude Code iterated on compiler output to replace the deprecated kernel APIs, made a standalone out-of-tree build, then diagnosed hardware detection failures by comparing dmesg logs Brant pasted in against a known-good log. The driver now runs on Xubuntu 24.04.
The numbers (as reported)
| Time | Two evenings |
|---|---|
| Kernel version jump | 2.4 → 6.8 |
| Author's by-hand estimate | Probably several weeks (would have meant learning 25-year-old kernel development) |
Facts
- Company / subject
- Dmitry Brant (independent developer)
- Tools
- Claude Code
- Codebase
- brownfield
- Work type
- Modernization
- Stack
- C, Linux kernel
- Published
- 2025-09-07
- Last checked
- 2026-10-18
Caveats
Needed several manual code fixes and back-and-forth. Hardware testing needed sudo, so the human loaded modules and pasted logs by hand. The author stresses it wouldn't have been possible without baseline kernel-module and C knowledge. Hobby project, single developer; the by-hand estimate is his own guess.