CrystalDiskInfo is an open-source Windows storage monitoring utility that reads S.M.A.R.T. data from supported HDDs, SSDs, NVMe drives, USB devices, and some RAID configurations to report health, temperature, and technical status.
CrystalDiskInfo monitors the health and operating status of supported hard drives, solid-state drives, and NVMe storage devices on Windows. It reads S.M.A.R.T. information and presents drive temperature, health status, firmware, interface details, transfer mode, power-on hours, power cycle count, and device-specific attributes in one interface. The utility supports internal ATA drives, NVMe devices, selected USB-connected storage, and some Intel or AMD RAID configurations. CrystalDiskInfo is useful for users, technicians, and system administrators who want early visibility into storage warnings or unusual operating conditions. Its color-coded health indicators simplify routine checks while detailed attribute values remain available for deeper diagnosis.
CrystalDiskInfo can remain active in the Windows notification area, refresh drive information automatically, generate temperature or health alarms, record supported events, and graph selected S.M.A.R.T. values over time. Current releases support Windows 11 through older Windows editions, with x86, x64, and ARM64 architectures available through appropriate packages; NVMe monitoring requires Windows 10 or Windows Server 2016 or later. Users managing large downloaded files with qBittorrent can monitor the destination drive separately for temperature, health changes, and storage-related warning indicators. Support for external disks depends on the USB bridge or controller exposing compatible commands, so not every enclosure, RAID controller, or storage adapter provides identical monitoring data.
CrystalDiskInfo gives users an immediate view of storage health, helping them notice warning signs before a drive problem becomes harder to investigate. Instead of checking raw diagnostic commands manually, users can review temperature, power-on hours, interface information, firmware, health status, and S.M.A.R.T. attributes from one compact window. Color-coded Good, Caution, Bad, and Unknown states make routine checks faster, while detailed raw values remain available when technicians need deeper analysis. Resident monitoring and configurable alarms can surface changes without requiring the main window to stay open, and graphing helps users observe supported values over time. CrystalDiskInfo also handles several storage technologies within the same workflow, including SATA drives, NVMe devices, selected USB storage, and some RAID configurations. For maintenance work, these capabilities improve visibility into drive condition and make it easier to identify unusual temperatures, degrading attributes, remaining-life warnings, or connectivity details before deciding whether backup, replacement, or further testing is appropriate.
CrystalDiskInfo reads S.M.A.R.T. information exposed by supported storage devices and displays normalized, threshold, and raw attribute data where available. These values can reveal information about reallocated sectors, pending sectors, uncorrectable errors, remaining SSD life, power cycles, operating hours, and other vendor-defined measurements useful during drive-health assessment.
CrystalDiskInfo converts supported diagnostic values into simplified Good, Caution, Bad, or Unknown health states. For hard drives, warnings can reflect attributes such as reallocated, pending, or uncorrectable sectors, while supported SSD health calculations may use remaining-life information. The status provides a quick screening tool without hiding underlying S.M.A.R.T. values.
Drive temperatures are displayed for supported devices and can be shown in Celsius or Fahrenheit. CrystalDiskInfo allows temperature thresholds to trigger visual or audible warnings while the program is resident in Windows. This makes it easier to notice storage devices operating above a preferred temperature during sustained transfers, workloads, or restricted cooling conditions.
CrystalDiskInfo reports device information including model, firmware version, serial number, interface, transfer mode, drive letters, rotation rate when reported, power-on count, and power-on hours. It also identifies supported capabilities such as S.M.A.R.T., TRIM, NCQ, APM, AAM, and DevSleep where the drive and interface expose those details.
The utility supports NVMe storage and selected external drives connected through compatible USB bridge controllers, in addition to standard ATA devices. CrystalDiskInfo can also work with some Intel and AMD RAID configurations. Exact information varies because external enclosures, bridges, drivers, and RAID controllers do not always pass every required monitoring command.
CrystalDiskInfo can remain resident in the Windows notification area and periodically refresh supported drive information. Configurable alarms can react to temperature or health changes, while Windows Event Log integration records supported degradation and recovery events. Email alerts are also available when the required .NET Framework and mail configuration are present.
Graphing tools display changes in selected S.M.A.R.T. values over time, providing more context than a single current reading. CrystalDiskInfo users can review trends in supported attributes and temperatures to investigate gradual changes, recurring thermal conditions, or health indicators that deserve closer attention during longer-term storage monitoring and troubleshooting.
CrystalDiskInfo includes controls for Automatic Acoustic Management and Advanced Power Management on compatible drives. These settings can adjust supported acoustic or power-management behavior and may be reapplied automatically when configured. Availability depends entirely on the drive, controller, firmware, and driver, so unsupported hardware may ignore or omit these controls.
CrystalDiskInfo is used to monitor the condition of supported HDDs, SSDs, and NVMe drives. It displays S.M.A.R.T. attributes, temperature, health status, firmware, interface details, power-on hours, transfer modes, and other storage information that can help with routine maintenance and troubleshooting.
Yes. The software is distributed under the MIT License, which maps to the Open Source license type in HSWare. Its standard edition can be used without purchasing a commercial license.
For hard drives, a Caution state can be triggered when monitored raw values such as Reallocated Sectors Count, Current Pending Sector Count, or Uncorrectable Sector Count cross configured thresholds. On supported SSDs, remaining-life information may also influence health status. Important data should be backed up before investigating a deteriorating drive.
Yes. NVMe monitoring is supported on compatible hardware and requires Windows 10 or Windows Server 2016 or later according to the official system requirements. The exact attributes available depend on the NVMe device, controller, firmware, and driver.
It supports selected USB-connected HDDs and SSDs when the bridge or enclosure provides compatible pass-through commands. Some USB adapters and external storage controllers do not expose the information required for full health monitoring, so detection and available S.M.A.R.T. data can vary.
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