By the end of this guide, you’ll know exactly how to check SSD health on Windows, Mac, and Linux using free tools.

This is for beginners, gamers, PC builders, and anyone worried about drive failure or silent data corruption.

Time to complete: about 5–15 minutes for one drive.

Quick Answer

Use CrystalDiskInfo on Windows, smartctl (smartmontools) on Mac/Linux, or GNOME Disks on Linux to read SMART health data. If your SSD shows rising reallocated sectors, critical warnings, or very low wear remaining (around 5% or less), back up immediately and plan replacement.

Why checking SSD health matters in 2026

SSDs fail differently than old hard drives. You might not hear noise first—you may only notice random freezes, file corruption, or sudden read-only mode. SMART monitoring is one of your best early warning systems. Tom’s Hardware reports SMART indicators can predict a large share of failures (often cited in the 70–90% range depending on workload and model), which is why routine checks are worth it.

Reference: Tom’s Hardware SSD health guide.

Step 1: Check SSD health on Windows (CrystalDiskInfo)

  1. Download and install CrystalDiskInfo.
  2. Open the app and select your SSD if multiple drives are listed.
  3. Check these fields first: Health Status, Temperature, and SMART attribute table.
  4. Look for warning signs:
    • Health not marked Good
    • Temperature consistently near or above ~70°C under normal use
    • Reallocated/pending/uncorrectable values increasing over time

Expected result check: You should see your SSD listed with a readable health label, current temperature, and SMART attributes. If values look stable and health is Good, your drive is likely fine today.

Step 2: Check SSD health on Mac (smartctl or DriveDx trial)

Mac users can use either the DriveDx trial (GUI) or smartctl (free CLI).

Option A: smartctl (free, recommended)

  1. Install Homebrew if needed: brew.sh
  2. Install smartmontools:
brew install smartmontools
  1. List disks and identify your SSD (usually /dev/disk0 or similar):
diskutil list
  1. Run SMART report:
sudo smartctl -a /dev/disk0

Option B: DriveDx trial (GUI)

Download from binaryfruit.com/drivedx and review health, temperature, and lifetime indicators.

Expected result check: You should get a full SMART readout with overall health status and attribute-level details. If overall status fails or attributes degrade quickly, treat it as urgent.

Step 3: Check SSD health on Linux (smartctl + GNOME Disks)

CLI method (smartctl)

  1. Install smartmontools:
    • Debian/Ubuntu: sudo apt install smartmontools
    • Fedora: sudo dnf install smartmontools
    • Arch: sudo pacman -S smartmontools
  2. Find device names:
lsblk
  1. Run report (example NVMe device):
sudo smartctl -a /dev/nvme0

GUI method (GNOME Disks)

Open GNOME Disks, select the SSD, then open SMART data / self-test options.

Expected result check: You should see SMART status as passed/healthy and be able to review wear indicators and media errors.

What SSD metrics actually matter

  • Overall health/status: should be healthy/passed/good.
  • Temperature: sustained high temps reduce lifespan; improve airflow if frequently near ~70°C.
  • Reallocated/pending/uncorrectable sectors: ideally zero and not rising.
  • Wear/life remaining: if near very low remaining life (commonly around 5% or lower), plan replacement.
  • Total host writes / TBW progress: helps estimate remaining life against vendor endurance specs.

References: smartmontools docs, CrystalDisk attribute references, community tool discussion.

Red flags that mean “backup now”

  • Health changed from Good/Passed to Caution/Warning/Failed
  • SMART error log entries growing week to week
  • Frequent I/O errors, disappearing files, or sudden system freezes
  • Drive flipping to read-only mode unexpectedly
  • Wear remaining critically low

If you see one or more of these, create a full backup immediately, then schedule replacement.

Weekly 2-minute SSD check routine

  1. Open your preferred tool and note health + temperature + wear.
  2. Compare to last week (simple notes file is enough).
  3. If any key metric worsened, trigger backup and monitor daily.

Expected result check: You should have trend visibility, not just one-time snapshots, which is what catches slow degradation early.

Common mistakes

  • Checking only once, then forgetting for months.
  • Ignoring “caution” because the PC still boots.
  • Comparing unrelated SMART attributes between different brands as if they are identical.
  • Assuming SSDs fail gracefully every time (some fail fast).
  • Skipping backups because health still says Good.

Troubleshooting

Tool says SMART unsupported

Try running with admin/root permissions and confirm the correct device path. On some USB enclosures, SMART passthrough is limited.

No NVMe data appears

Update smartmontools and use the correct NVMe device path (for example /dev/nvme0 on Linux).

Temperature looks high during gaming or exports

Retest at idle after 10–15 minutes. If still high, improve case airflow and check heatsink/contact.

Health says good but system still crashes

Rule out RAM, PSU, motherboard, and cable issues. SMART is useful, but it is not the only failure signal.

Related guides

Bottom line

If you run one SSD health check per week and react early to red flags, you dramatically lower your chances of surprise data loss. Start with the free tools above, track trends, and treat warnings as action items—not background noise.