SMART Summary Helper

smart.py is a small CLI that summarizes SMART data across disks. It uses smartctl (JSON) and, when needed, supplements missing values with Seagate’s OpenSeaChest (openSeaChest_SMART). Mount points and driver hints are configurable via smartpy.env.

Requirements

• Python 3
• smartmontools (smartctl on PATH)
• Optional: OpenSeaChest (openSeaChest_SMART on PATH or set via SEACHEST_BIN)

Configuration (smartpy.env)

Example is included. Supported keys:

• MOUNT_SDA=/mnt/disks/movies – mount points per base device; multiple separated by commas
• DRIVER_SDA=sat,scsi – smartctl driver order per base device; if set, only this order is tried (no automatic fallback)
• SEACHEST_BIN=openSeaChest_SMART – path/binary name for SeaChest

Mount hints apply to the base device (e.g., MOUNT_SDA covers /dev/sda1). If no entry exists, /etc/fstab is scanned for /dev/... lines (UUID/LABEL are ignored).

Usage

• Auto-discover (sd?, nvme?, mmcblk?):
  python3 smart.py
• Explicit devices:
  python3 smart.py /dev/sda /dev/sdb

Output per disk includes model, mount points, chosen smartctl driver, and protocol. Key lines:

• Health / Assessment
• Temperature, Power-On-Hours (with y/m/d/h breakdown)
• Reallocated / Pending / Offline-Uncorrectable
• Reasons (shown on warnings/errors or when fallbacks were used)

Behavior

• smartctl: Uses JSON (-H -A -j). Driver from DRIVER_* or default order (auto, sat, scsi).
• SeaChest: Invoked when essential fields are missing. Supplemented values/errors are noted under “Reasons”. Device is called with --device <path> --smartAttributes.
• USB/SCSI devices often hide attributes; the script calls this out explicitly.

Tips

• For many USB Seagate enclosures: set DRIVER_SDI=sat and SEACHEST_BIN=openSeaChest_SMART in smartpy.env.
• To experiment with drivers, set a comma-separated order (e.g., DRIVER_SDI=sat,scsi).