A hard drive or SSD is one of the most important components of a computer because it stores your operating system, applications, documents, photos, videos, and other valuable files. When a storage drive starts developing problems, you may notice slow performance, freezing, corrupted files, unusual noises, or unexpected crashes.
The good news is that you do not always have to wait for a hard drive to fail before discovering a problem. You can check hard drive health using built-in operating-system tools, S.M.A.R.T. monitoring, manufacturer diagnostic software, and third-party disk health utilities.
This guide explains how to check hard drive health, how to check HDD and SSD health, how to identify bad sectors, how to read S.M.A.R.T. information, and what to do when your drive shows warning signs.
Table of Contents
- What Is Hard Drive Health?
- Why Should You Check Hard Drive Health?
- How to Check Hard Drive Health in Windows
- Check Drive Health Using Windows Security
- Check Hard Drive Health With CHKDSK
- Check HDD Health Using PowerShell
- Check S.M.A.R.T. Hard Drive Health
- Use CrystalDiskInfo to Check Disk Health
- Use Manufacturer Diagnostic Tools
- How to Check SSD Health
- How to Check Hard Drive Health on Mac
- How to Check Drive Health on Linux
- Common Signs of a Failing Hard Drive
- Important S.M.A.R.T. Attributes to Watch
- What Does a Bad Sector Mean?
- What Do Good, Warning, and Critical Drive Statuses Mean?
- How Often Should You Check Hard Drive Health?
- What to Do if Your Hard Drive Is Failing
- HDD vs SSD Health Monitoring
- Frequently Asked Questions
What Is Hard Drive Health?
Hard drive health refers to the current condition, reliability, and expected operating status of a storage drive.
A traditional HDD contains spinning magnetic platters and mechanical components, while an SSD uses flash memory without moving parts. Both can experience wear, errors, overheating, firmware problems, or other failures.
Drive-health monitoring can provide information about:
- S.M.A.R.T. status
- Bad sectors
- Reallocated sectors
- Pending sectors
- Uncorrectable errors
- Drive temperature
- Read/write errors
- SSD wear level
- Total data written
- Power-on hours
- Drive lifetime indicators
- Overall disk condition
However, a health report is not a guarantee that a drive will never fail. S.M.A.R.T. is useful for detecting certain failure risks, but not every type of storage failure can be predicted. Seagate specifically notes that S.M.A.R.T. errors can indicate a near-term failure even when the drive still appears to work normally.
Why Should You Check Hard Drive Health?
Regularly checking your HDD health or SSD health can help you discover potential problems before they become data-loss emergencies.
Some common reasons to monitor disk health include:
1. Prevent Data Loss
A failing drive can become inaccessible without much warning. Checking its health gives you an opportunity to back up important files.
2. Detect Bad Sectors
Bad sectors can cause read/write errors, corrupted files, application crashes, and operating-system problems.
3. Monitor Drive Temperature
Excessive heat can contribute to storage problems. Monitoring temperature can help identify cooling or ventilation issues.
4. Identify Aging Drives
A drive with high power-on hours, increasing error counts, or declining SSD endurance may deserve closer monitoring or replacement planning.
5. Troubleshoot Computer Problems
Slow boot times, freezing, corrupted files, and unexpected errors can sometimes be related to storage problems.
How to Check Hard Drive Health in Windows
Windows provides several ways to check storage health. You can use:
- Windows Security
- CHKDSK
- PowerShell
- S.M.A.R.T. information
- Manufacturer diagnostic software
- Third-party disk health monitoring tools
For a basic check, start with Windows’ built-in tools. For a more detailed analysis, use S.M.A.R.T. monitoring or the manufacturer’s diagnostic software.
1. Check Drive Health Using Windows Security
Windows 10 and Windows 11 include a Device performance & health section in Windows Security.
Microsoft describes this area as a way to review the overall health of a Windows device and identify common problems involving areas such as storage, battery, and system reliability.
Steps:
- Open the Start Menu.
- Search for Windows Security.
- Open Windows Security.
- Select Device performance & health.
- Review the health report.
This is useful for getting a general overview of your computer.
However, Windows Security is not the same as a complete S.M.A.R.T. diagnostic report. If you want detailed information about individual drive attributes, use a dedicated disk-health utility or your drive manufacturer’s diagnostic software.
2. Check Hard Drive Health With CHKDSK
CHKDSK, short for Check Disk, is a Windows command-line utility used to check a file system and disk-related problems.
Basic CHKDSK scan
Open Command Prompt as Administrator and enter:
chkdsk C: /scan
Replace C: with the appropriate drive letter if necessary.
The /scan option performs an online scan of the file system.
For repair operations, Windows also provides options such as:
chkdsk C: /f
The /f parameter instructs CHKDSK to fix file-system errors.
Important:
CHKDSK and a S.M.A.R.T. health check serve different purposes.
CHKDSK primarily checks the file system and logical disk errors, while S.M.A.R.T. provides information reported by the storage device itself.
Therefore, passing CHKDSK does not necessarily mean that a physically aging drive is completely healthy.
3. Check Hard Drive Health Using PowerShell
Windows PowerShell can provide a quick health status for physical disks.
Open PowerShell as Administrator and use:
Get-PhysicalDisk | Select FriendlyName, HealthStatus, OperationalStatus
You may see information such as:
- FriendlyName
- HealthStatus
- OperationalStatus
A drive showing Healthy is generally reporting a normal status through Windows’ storage-management system.
You can also use:
Get-PhysicalDisk
to display additional information about physical disks.
Keep in mind that Windows’ reported health status is not a complete replacement for manufacturer diagnostics or detailed S.M.A.R.T. monitoring.
4. Check S.M.A.R.T. Hard Drive Health
One of the most important terms associated with hard drive health monitoring is S.M.A.R.T.
S.M.A.R.T. stands for:
Self-Monitoring, Analysis and Reporting Technology
It allows compatible storage devices to monitor certain characteristics related to their condition and reliability.
S.M.A.R.T. can help identify potential problems before a complete drive failure occurs. Seagate explains that a S.M.A.R.T. error is a prediction of likely near-term failure, although the drive may continue functioning normally for some time.
Common S.M.A.R.T.-related information includes:
- Reallocated Sector Count
- Current Pending Sector
- Offline Uncorrectable
- Read Error Rate
- Seek Error Rate
- Spin Retry Count
- Temperature
- Power-On Hours
- Interface errors
The exact attributes and thresholds can vary by drive manufacturer and model.
5. Use CrystalDiskInfo to Check Disk Health
CrystalDiskInfo is a popular third-party utility for viewing storage-drive information on Windows.
Depending on the drive and interface, a disk-health monitoring program may show:
- Overall health status
- Drive temperature
- S.M.A.R.T. attributes
- Power-on hours
- Drive model
- Firmware information
- Reallocated sectors
- Pending sectors
- Interface errors
This can be particularly useful when you want more information than the basic Windows health tools provide.
Important warning
Do not panic because of a single unfamiliar S.M.A.R.T. value. S.M.A.R.T. attributes are not interpreted identically across every manufacturer and drive model. Seagate notes that third-party utilities may display S.M.A.R.T. information differently and that vendor-specific thresholds can vary.
If your drive manufacturer provides its own diagnostic utility, it is usually a good idea to use that tool for confirmation.
6. Use Manufacturer Diagnostic Tools
Many storage manufacturers provide their own utilities for hard drive diagnostics and SSD testing.
For example, Seagate provides SeaTools, which can diagnose hard drives and monitor SSDs. SeaTools is available for Windows and Linux, and Seagate also provides a bootable version.
A manufacturer diagnostic program may provide tests such as:
- S.M.A.R.T. status
- Short drive test
- Extended drive test
- Read tests
- Media checks
- Error detection
- SSD health information
Seagate recommends backing up important data before running diagnostic tests.
Why manufacturer tools matter
A third-party application may display many S.M.A.R.T. attributes, but the drive manufacturer understands its own hardware and diagnostic criteria.
If a manufacturer’s diagnostic test reports FAIL, take the result seriously and back up your data immediately.
How to Check SSD Health
Checking an SSD health is slightly different from checking a traditional mechanical hard disk.
An SSD has no spinning platters or mechanical read/write heads. Instead, it uses NAND flash memory.
Important SSD-health information may include:
- Percentage used
- Remaining life
- Total bytes written
- Total bytes read
- Drive temperature
- Available spare
- Media errors
- S.M.A.R.T. status
- Wear indicators
Some SSD monitoring tools provide a lifetime remaining or percentage health indicator.
For example, Seagate’s SSD monitoring documentation describes dashboards that can show drive status, temperature, total bytes written, and lifetime remaining.
SSD health does not work exactly like HDD health
For HDDs, attributes such as reallocated sectors and mechanical errors can be important.
For SSDs, indicators related to NAND wear, total bytes written, spare capacity, and lifetime estimation can be more relevant.
How to Check Hard Drive Health on Mac
Mac users can use built-in macOS utilities to troubleshoot storage problems.
Use Disk Utility
- Open Applications.
- Go to Utilities.
- Open Disk Utility.
- Select the physical drive or volume.
- Use First Aid when appropriate.
Disk Utility can help identify and repair certain file-system problems.
However, First Aid is not a complete prediction system for drive failure. If you suspect a failing physical drive, back up important files and consider using the storage manufacturer’s diagnostic tools.
How to Check Hard Drive Health on Linux
Linux users can use several tools to monitor drive health.
One widely used option is smartmontools, which includes the smartctl command.
For example:
sudo smartctl -a /dev/sda
The exact device name may be different on your system.
You can use S.M.A.R.T. information to review supported attributes, drive status, temperature, error information, and other diagnostic details.
For NVMe SSDs, Linux users may use NVMe-specific tools and commands rather than treating the device exactly like a traditional SATA HDD.
Common Signs of a Failing Hard Drive
You should investigate your storage drive if you experience several of these symptoms:
1. Unusual Clicking or Grinding Sounds
Traditional HDDs can produce unusual mechanical noises when hardware components begin to fail.
A repeated clicking sound can be particularly concerning.
2. Extremely Slow Performance
A drive that suddenly becomes very slow may have storage, file-system, hardware, or other system problems.
3. Frequent Freezing
Repeated system freezes can sometimes be caused by storage-related errors.
4. Corrupted Files
Files that suddenly become unreadable or corrupted can indicate a storage problem, although software and file-system problems can also cause corruption.
5. Frequent Disk Errors
Repeated read/write errors deserve investigation.
6. Missing Files or Folders
Unexpectedly disappearing files may indicate file-system corruption or drive problems.
7. SMART Warning
A S.M.A.R.T. warning should be treated seriously. If the drive reports a S.M.A.R.T. failure, back up important data immediately.
8. Drive Disappearing
If the drive repeatedly disconnects or disappears from the operating system, investigate the drive, cables, ports, power supply, enclosure, and controller.
Important S.M.A.R.T. Attributes to Watch
If you use a detailed hard disk health checker, you may see many S.M.A.R.T. attributes.
Some commonly discussed attributes include:
| S.M.A.R.T. Attribute | What It Can Indicate |
|---|---|
| Reallocated Sector Count | Sectors that have been remapped |
| Current Pending Sector | Sectors waiting for further evaluation |
| Offline Uncorrectable | Data that could not be corrected |
| Read Error Rate | Problems associated with reading data |
| Seek Error Rate | Problems positioning HDD heads |
| Spin Retry Count | Problems getting an HDD spindle running |
| Temperature | Current or historical operating temperature |
| Power-On Hours | Total time the drive has been powered |
| CRC Error Count | Possible communication/interface problems |
Do not interpret every value in isolation. Different manufacturers use different implementations, raw-value formats, and thresholds. Seagate explicitly warns that S.M.A.R.T. attribute interpretation can vary between drive designs.
What Does a Bad Sector Mean?
A bad sector is a portion of a storage device that cannot reliably store or retrieve data.
There are generally two broad categories:
Physical Bad Sectors
These are associated with physical damage or degradation of the storage media.
Logical Bad Sectors
These may result from file-system or data-related problems and can sometimes be corrected by software.
A growing number of bad sectors is a warning sign, particularly when accompanied by other S.M.A.R.T. errors.
If a diagnostic test reports serious media errors, prioritize your backup rather than repeatedly stressing the drive with unnecessary tests.
What Do Good, Warning, and Critical Drive Statuses Mean?
Different applications use different labels, but you will commonly see statuses such as:
Good / Healthy
The drive is currently reporting no major health problem according to that tool.
This does not guarantee that the drive can never fail.
Warning / Caution
The software has detected information that deserves attention.
Examples may include:
- Increasing bad sectors
- High temperature
- Reduced SSD life
- Pending sectors
- Other S.M.A.R.T. concerns
Bad / Critical / Failed
The drive is reporting a serious problem.
If you see a critical health warning, immediately back up important data and prepare for drive replacement.
A S.M.A.R.T. failure can be a near-term failure prediction, and Seagate recommends backing up data as soon as possible after such a warning.
What to Do If Your Hard Drive Is Failing
If your disk-health checker reports a serious problem, do not wait until the drive completely stops working.
Follow these steps.
Step 1: Back Up Important Data
Copy your most important files to:
- External hard drive
- External SSD
- Another computer
- Network storage
- Reliable cloud storage
Prioritize irreplaceable documents, photographs, videos, business files, and other personal data.
Step 2: Stop Unnecessary Drive Activity
If the drive is making serious mechanical noises or repeatedly disconnecting, avoid unnecessary copying, benchmarking, or stress testing.
Step 3: Run a Manufacturer Diagnostic
If the drive is still stable enough to test, use the manufacturer’s diagnostic software.
For example, SeaTools can perform diagnostic tests on compatible Seagate storage devices.
Step 4: Check Cables and Connections
For desktop HDDs and external drives, inspect:
- SATA cables
- USB cables
- Power cables
- External drive enclosures
- USB ports
A connection problem can sometimes look like a failing drive.
Step 5: Replace a Failing Drive
If a diagnostic test reports a failure, replacement is generally safer than continuing to rely on the drive for important data.
HDD vs SSD: Which Health Indicators Matter?
Although both HDDs and SSDs are storage devices, their failure mechanisms are different.
| Feature | HDD | SSD |
|---|---|---|
| Moving parts | Yes | No |
| Mechanical wear | Yes | No |
| Flash-memory wear | No | Yes |
| Bad sectors | Important | Different mechanism |
| Temperature monitoring | Important | Important |
| S.M.A.R.T. | Yes | Yes |
| Power-on hours | Useful | Useful |
| Total bytes written | Less central | Very important |
| Lifetime indicator | Model dependent | Common on many SSDs |
An HDD may show warning signs involving mechanical components or bad sectors, while an SSD’s health report may focus more heavily on flash-memory wear and endurance.
How Often Should You Check Hard Drive Health?
There is no single schedule that works for every computer.
For a normal personal computer, checking drive health periodically can be useful.
Consider checking more frequently if:
- The drive contains important business data.
- The computer is several years old.
- The drive is heavily used.
- You notice unusual performance.
- You receive disk-related errors.
- The drive has already shown S.M.A.R.T. warnings.
- You use an older mechanical HDD.
Most importantly, drive-health monitoring should not replace backups.
A healthy drive can still fail unexpectedly.
Can You Repair a Bad Hard Drive?
It depends on the type of problem.
File-System Problems
Some logical errors can potentially be repaired using tools such as CHKDSK.
Bad Sectors
Software may sometimes handle certain logical disk errors, but physical media degradation is a different issue.
Mechanical Failure
A clicking, grinding, or mechanically failing HDD should generally be replaced rather than trusted with important data.
S.M.A.R.T. Failure
A S.M.A.R.T. failure should be treated as a serious warning. Seagate states that there is no method to repair the underlying problem represented by a S.M.A.R.T. failure and recommends backup and replacement consideration.
Hard Drive Health Check: Quick Checklist
Use this checklist if you want a simple way to evaluate your drive:
- Check Windows Device performance & health
- Run CHKDSK when file-system problems are suspected
- Check PowerShell physical-disk status
- Review S.M.A.R.T. information
- Check drive temperature
- Look for reallocated sectors
- Look for pending sectors
- Look for uncorrectable errors
- Monitor SSD lifetime or wear indicators
- Run the manufacturer’s diagnostic utility
- Back up important files
- Replace the drive if diagnostics report failure
Best Way to Check Hard Drive Health
If you want the most reliable overall approach, do not depend on just one test.
A good hard drive health check combines:
1. Windows/macOS/Linux health information
plus
2. S.M.A.R.T. monitoring
plus
3. File-system checking
plus
4. Manufacturer diagnostic testing
plus
5. Real-world symptoms
For example, if Windows reports that the disk is healthy but the drive is making repeated clicking noises and a manufacturer diagnostic reports failure, the diagnostic result should not be ignored.
Frequently Asked Questions
How can I check my hard drive health?
On Windows, you can use Windows Security, PowerShell, CHKDSK, S.M.A.R.T. monitoring software, or the manufacturer’s diagnostic utility. For detailed information, S.M.A.R.T. monitoring and manufacturer diagnostics are particularly useful.
How do I check HDD health in Windows 10?
You can check Windows Security’s Device performance & health page, use CHKDSK, inspect physical disk information with PowerShell, or use a dedicated HDD health checker.
How do I check hard drive health in Windows 11?
Windows 11 provides Device performance & health, while PowerShell, CHKDSK, S.M.A.R.T. tools, and manufacturer diagnostic software can provide additional information.
How do I check SSD health?
Use an SSD monitoring utility, your SSD manufacturer’s diagnostic application, or operating-system tools that expose storage health information. Look for indicators such as temperature, percentage used, total bytes written, remaining life, and S.M.A.R.T. status.
Is 100% hard drive health good?
A health percentage shown by a third-party application is an interpretation created by that software. It should not be treated as a universal measurement for every drive. Always consider the actual S.M.A.R.T. information and manufacturer diagnostic results.
Can CHKDSK check hard drive health?
CHKDSK can check and, with the appropriate options, repair certain file-system problems. However, it is not a complete physical-health or failure-prediction test.
What is S.M.A.R.T. hard drive health?
S.M.A.R.T. stands for Self-Monitoring, Analysis and Reporting Technology. It allows compatible storage devices to report certain health and reliability information.
What does a S.M.A.R.T. warning mean?
A S.M.A.R.T. warning can indicate that the drive has detected conditions associated with increased failure risk. If you receive a S.M.A.R.T. failure warning, back up important data immediately.
How do I know if my hard drive is dying?
Common warning signs include unusual HDD noises, repeated disk errors, corrupted files, extremely slow performance, disappearing drives, bad-sector problems, and S.M.A.R.T. warnings.
Should I replace a hard drive that has bad sectors?
If bad sectors are increasing or the drive’s diagnostic software reports failure, you should not rely on the drive for important data. Back up your files and consider replacing the drive.
How often should I check my hard drive?
Checking periodically is useful, especially for older drives or computers containing important data. However, regular backups are more important than relying solely on health checks.
Knowing how to check hard drive health can help you identify potential storage problems before they turn into major data-loss events. Windows users can start with built-in tools such as Windows Security, CHKDSK, and PowerShell, while S.M.A.R.T. monitoring and manufacturer diagnostic software can provide deeper information.
Remember that no health check can guarantee that a drive will never fail. S.M.A.R.T. has predictive limitations, and some failures cannot be predicted in advance.
The safest approach is to monitor your drive, keep regular backups, investigate warning signs, and replace a drive when reliable diagnostics indicate that it is failing.
Sources & Further Reading
- Microsoft Support — Device performance and health
- Seagate — SeaTools Diagnostic Software
- Seagate — Testing a potentially defective hard drive
- Seagate — Understanding S.M.A.R.T. errors
Disclaimer: This article is intended for general informational purposes. Storage-device behavior varies by manufacturer, model, operating system, and interface. Always back up important data before performing potentially intensive diagnostic or repair operations.