Disk Metrics and S.M.A.R.T. Data

Disk Status collects detailed metrics from your disks, including S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology) data.

What is S.M.A.R.T.?

S.M.A.R.T. is a monitoring system built into most modern storage devices. It tracks various attributes that can indicate potential failures before they occur.

Viewing Metrics

From any disk detail page, you can see:

Live Metrics

The most recent metric snapshot showing current values for monitored attributes.

Recent Metrics

A table of the last 25 metric readings, showing how values have changed over time.

Historical Metrics

Click View All Metrics to see paginated historical data for the disk.

Common S.M.A.R.T. Attributes

Different disk types report different attributes. Common ones include:

For HDDs:

Reallocated Sector Count
Spin Retry Count
Current Pending Sector Count
Uncorrectable Sector Count
Power-On Hours
Temperature

For SSDs:

Wear Levelling Count
Available Reserved Space
Media Wearout Indicator
Total LBAs Written
Temperature

Interpreting Metrics

Temperature: Higher temperatures can reduce disk lifespan
Reallocated Sectors: Increasing counts may indicate failing disk areas
Power-On Hours: Shows total operational time
Error Counts: Should remain at zero or very low values