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Changelog

All notable changes to this project will be documented in this file. The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

[1.3.0] - 2025-09-17

Added

  • Zero-pass fallback triggered automatically if discard verification fails.
  • Progress/ETA via pv for long writes (noise and zero passes), with automatic fallback to dd status=progress when pv isn’t available.
  • Pre-partition gap wipe helper that’s MBR/GPT-aware and respects protective/primary/backup GPT areas.

Previous version (1.2) had a big problem where it wasn't correctly formatting the drive in exFat. It was wiping fine but would hang on volume ID.

This was because we were racing the kernel/udev (partition node not ready yet) and hadn’t set the partition type,

so blkid/lsblk didn’t report exFAT reliably; we fixed that by adding the partprobe/udevadm settle/rescan loop and setting the type (MBR=0x07, GPT=msftdata).

After that, the only remaining “fail” was our own verifier flagging the pre-partition gap while --skip-wipe was on, which we changed to SKIP

(and only FAIL in --strict).

In my pursuit to find that problem, I added some features and a more robust method of formatting and being mindful of different setups:

  • Verification suite:

    • Protective MBR 0x55AA signature check.
    • Pre-partition gap erased check (now SKIP when --skip-wipe, FAIL only in --strict).
    • Middle/last MiB erased checks.
    • Partition table type matches requested MBR/GPT.
    • exFAT filesystem presence, label format, UUID format (####-####), 1MiB alignment, and readable sample inside partition.
    • MBR 0x07 / GPT Microsoft Basic Data (EBD0A0A2-…) partition type validation.

  • Robust partition re-read flow: partprobe, udevadm settle, partx, kpartx (if present), blockdev --rereadpt, and MMC rescan fallback.

  • Safety checks: refuse to run in WSL or containers; refuse system/root disk unless --genius.

  • Non-interactive mode with --device + --erase-confirm ERASE.

  • FAST mode (--fast): if DISCARD unsupported, skip noise pass.

  • Skip/limit modes: --skip-wipe, --noise-only, --zero-only.

  • Formatting controls: --no-format, --force-format, --gpt, label modes (--label RANDOM|CUSTOM, --label-text).

  • mkfs selection: prefer mkfs.exfat (exfatprogs), fallback to mkexfatfs (exfat-utils) with SPC computed from cluster size & sector size.

  • Cluster-size auto-pick for exFAT based on partition size (16K/32K/64K/128K).

  • Post-format snapshot (lsblk, blkid) and EXFAT signature verification.

  • JSON logging (device metadata, modes, timings) + per-run text verification log.

  • Power-off/eject on success via udisksctl (if available).

  • Doctor mode (--doctor) to check environment/deps.

  • Auto-install optional (--install-deps) for Debian/Ubuntu.

  • Trap cleanup on signals (flush/sync before exit).

Changed

  • Dependency checks tightened; clearer guidance; optional auto-install.
  • Partition creation standardizes on 1MiB start; MBR type set via sfdisk; GPT msftdata flag set via parted.
  • Label handling: RANDOM generator (A–Z0–9) or CUSTOM (sanitized, upcased, ≤11 chars).
  • Exit codes clarified: 0 success, 2 when verification fails under --strict.
  • Output styling consolidated under info/warn/die; color can be disabled with --no-color.

Fixed

  • Race conditions after partitioning by adding multiple re-read paths + MMC rescan.
  • Correct SPC calculation for mkexfatfs when sector size ≠ 512.
  • Accurate handling of pre-partition gap for both MBR and GPT disks.
  • Ensured verification respects --skip-wipe (reports SKIP; only FAILs in --strict).

(Previous releases for reference)

[1.2] - 2025-09-12

Added

  • Improved dependency checks and clearer README instructions for first-time users.
  • Enhanced unmount logic: recursive unmount + lazy fallback for stubborn mounts.
  • Double-confirmation safety flow refined (full path + explicit ERASE keyword).
  • Additional error handling and user feedback messages.

Changed

  • Reorganized and simplified code structure for readability.
  • Adjusted script to run cleanly under bash.
  • Updated README.md with usage instructions and quickstart notes.

[1.1] - 2025-09-10

Added

  • Flush and sync step before unmount to ensure all writes are committed.
  • Initial README.md with TL;DR and usage overview.

Changed

  • Streamlined prompts and confirmations to reduce accidental misuse.
  • Minor code cleanups and comments for maintainability.

[1.0] - 2025-09-08

Added

  • Initial release of AFDW (Anti-Forensic Drive Wiper).

  • Core functionality:

    • Detect and list disks.
    • Require full-path confirmation.
    • Securely wipe drives using multiple passes.
    • Basic unmounting routine.

  • MIT license.