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Drive Health Reader

Paste smartctl output for a SATA disk or an NVMe drive and get a verdict rather than a table of numbers. Distinguishes reallocated sectors from pending ones, flags when a drive reports PASSED while actively failing, and tells you when CRC errors mean the cable rather than the disk.

Run smartctl -a /dev/sdX (or -a /dev/nvme0 for NVMe) and paste the whole thing. Parsed in your browser — nothing is uploaded.

Method & assumptions
  • A drive can report PASSED and still be failing. The self-assessment only trips on the manufacturer’s own thresholds, which are set so the drive stays inside warranty — not so your data stays intact.
  • Reallocated sectors that are stable are survivable. Pending sectors are not — those are blocks the drive has found bad and has not managed to move yet.
  • UDMA CRC errors happen on the interface between the drive and the controller. Replace the cable and try another port before condemning the disk.
  • Rated endurance and spare capacity are the numbers that matter on SSDs and NVMe; sector counts matter on spinning disks.
  • One clean report is a snapshot. Trend the counters — a number that is moving matters far more than its absolute value.
  • Parsed in your browser. Nothing is uploaded.
The guide behind it

SMART Attributes That Predict Failure

The reader gives you a verdict. The guide explains which attributes it weighed and why pending sectors outrank reallocated ones.

Read the guide

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More on the bench

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