How to tell if SSD is going bad?

[How to tell if SSD is going bad]: 300-600 TBW limit

Understanding how to tell if SSD is going bad involves monitoring the percentage health score. This method offers the safest bet for understanding drive status. Interpreting raw SMART data remains confusing for both professionals and general users. Learn the limits of NVMe SSDs before they reach significant degradation.

The Silent Decline: How SSDs Fail Differently

To check if your SSD is failing, look for signs of ssd failure like slower performance, frequent file corruption, or system crashes. You can verify the health status using built-in command prompt tools, System Report on Mac, or specialized SMART reading software like CrystalDiskInfo.

Lets be honest - nobody wakes up expecting their hard drive to die. Ive been there. Last year, my primary workstation started freezing randomly during simple tasks. I blamed software updates and reinstalled my drivers three times. Took me three days of frustrating debugging to realize the SSD controller was actually failing. Harder than it looks.

Unlike older mechanical hard drives that click and grind before dying, solid-state drives are completely silent. They fail electronically. This makes diagnosing them tricky. But there is one counterintuitive symptom that 90 percent of users overlook - I will explain the read-only lock in the warning signs section below.

4 Warning Signs Your SSD is Failing

If you experience any of these symptoms, your drive might be reaching its physical limit:

The Read-Only Lock: Here is that critical symptom I mentioned earlier. When an SSD exhausts its write cycles, it often locks itself into read-only mode to prevent data corruption. You can open files, but you cannot save anything new. Blue Screen of Death (BSOD): Frequent system crashes during boot sequences. Phantom Files: Files that will not open, disappear entirely, or throw read errors when you try to move them. Severe Lag: Applications freeze for 10-20 seconds for no apparent reason.

Waiting until total failure reduces data recovery chances significantly. Once the NAND flash controller dies completely, getting your files back becomes nearly impossible. Game over. ^[1]

How to Check SSD Health on Windows 11

You do not need to be an IT expert to check your drives health. Start with what is already built into your system.

The Command Prompt Method

Open Command Prompt as an administrator. Type wmic diskdrive get status and press Enter. If the result says OK, the basic SMART status is passing. If it says Pred Fail or Bad, your drive is failing right now. Stop right there. Back up immediately.

Using CrystalDiskInfo

For a more detailed look, use CrystalDiskInfo. This free utility reads the precise wear level of your drive. Look at the Health Status box. If it shows Caution or Bad, the drive has logged critical errors. This serves as a reliable ssd health check tool. The percentage indicator shows how much of the manufacturers expected lifespan remains.

Modern NVMe SSDs typically handle between 300 and 600 Terabytes Written before degrading significantly.^[2] In reality, interpreting crystaldiskinfo health status meaning is confusing even for professionals, so relying on this percentage health score is usually the safest bet.

How to Check SSD Status on Mac

Apple hides its hardware diagnostics a bit deeper, but the built-in tools are incredibly robust.

System Report Verification

Click the Apple logo, hold the Option key, and select System Information. Navigate to Hardware, then Storage or NVMe. Look for the S.M.A.R.T. Status line. It should say Verified. Anything else means trouble.

Disk Utility First Aid

Open Disk Utility, select your drive, and click First Aid. This tool checks the file system for corruption. Seldom does a single software optimization fix a dying physical drive, but First Aid can repair directory damage caused by sudden power losses or minor software crashes. This is a vital step in learning how to tell if SSD is going bad before your data is lost.

Choosing the Right Diagnostic Tool

Different tools provide different levels of detail about your SSD's health. Here is how they stack up.

Built-in OS Tools (WMIC / System Report)

Very basic pass or fail status only

Extremely fast, requires no downloads or installations

Quick checks when you suspect immediate failure

⭐ CrystalDiskInfo (Recommended)

Excellent - shows exact remaining percentage, temperature, and total data written

Simple color-coded interface (Blue, Yellow, Red)

Regular monitoring and diagnosing strange performance issues

Manufacturer Software (Samsung Magician, WD Dashboard)

Highest - allows for deep diagnostics and firmware updates

Polished interface but large download size

Updating firmware and running official diagnostic scans for warranty claims

The Read-Only Rescue

Mark, a freelance video editor, faced sudden Adobe Premiere crashes during a major project in October 2025. His initial thought was a software bug or overheating. Load testing his CPU showed absolutely no issues.

He tried clearing his cache, but the system threw an unusual write protected error. He rebooted, assuming it was a temporary glitch. The error persisted. The SSD had locked itself.

After running Samsung Magician, he realized the drive had exhausted its Terabytes Written limit. It was not a bug. The drive was intentionally refusing new data to protect his existing files from corruption.

He immediately cloned the read-only drive to a new NVMe SSD. The transfer took 4 hours, but he saved 2TB of client footage. Mark learned that hardware doesn't always fail violently - sometimes it just quietly locks its doors.