Can You Repair Hard Drive Bad Sectors?

Is your hard drive acting up with read/write errors or crawling along like it’s stuck in molasses? Bad sectors are often the culprit—but not all of them can be fixed, and some shouldn’t even be attempted. Here’s a practical troubleshooting guide to diagnose and handle them safely in 2026.

What's happening with your drive?

A bad sector is a damaged spot on your hard drive that can’t reliably store data. There are two types:

• Logical (soft) bad sectors: These often get fixed by the operating system.
• Physical (hard) bad sectors: These are permanent, caused by wear, drops, or factory defects. They can’t be repaired and will keep spreading if you keep using the drive.

As of 2026, most HDDs from major brands (Seagate, WD, Toshiba) still rely on magnetic platters that wear out after 3–5 years of heavy use, though enterprise drives might last longer.^{Backblaze 2026 Q1 Stats}

How to fix bad sectors step by step

Work through these steps in order. Stop immediately if you suspect physical damage.

1. Run Error Checking:
   Press Win + E to open File Explorer. Right-click the problematic drive (e.g., C:), choose Properties → Tools tab → Check under Error checking. Hit Scan drive.
2. Check the results:
   If Windows says, “We didn’t find any errors,” your drive is probably fine—at least logically. If it reports, “We found errors,” click Repair drive and let Windows fix the soft bad sectors.
3. Watch for physical damage:
   If the drive locks up, clicks like a metronome, or the scan keeps failing, it’s likely got physical bad sectors. Back up everything right away to an external drive or cloud storage.
4. Run CrystalDiskInfo (free):
   Grab CrystalDiskInfo (v9.2.0 or newer). Install it, then open it. Look for “Reallocated Sectors Count” or “Pending Sectors.” Any number above zero means physical damage.

Still no luck fixing the bad sectors?

1. Try CHKDSK from Command Prompt:
   Press Win + R, type cmd, then press Ctrl + Shift + Enter to open an elevated Command Prompt. Type:
   chkdsk C: /f /r /x
   (Swap C: for your actual drive letter.) This scans for and attempts to repair soft bad sectors. It can’t touch physical ones, though.
2. Use a bootable USB for a deep scan:
   If Windows won’t boot or the drive is failing, make a bootable Hiren’s BootCD PE USB. Boot from it and run Victoria or HDDScan for a surface scan. These tools map bad sectors with precision.
3. Replace the drive:
   If CrystalDiskInfo shows rising reallocated or pending sectors—or if CHKDSK keeps failing—the drive is toast. Clone your data with Clonezilla and swap in an SSD (a smart move in 2026 for both speed and reliability).

How to keep bad sectors from coming back

Here’s the thing: Zero-filling (writing zeros to every sector) or formatting can hide soft errors temporarily, but it won’t fix physical ones. Worse, it can shorten an SSD’s life by forcing extra writes.^{Kingston SSD Guide, 2025}