Software⏱️ 4 min read📅 2026-06-11

How to Fix: fsck error: currently, only 1 or 2 FATs are supported, not 34

Fix fsck error on FAT32 partition with only 1 or 2 supported FATs.

Quick Answer: Use a third-party tool like Hiren's BootCD to repair the FAT32 partition.

📋 Table of Contents

  1. ⚠️ Common Causes
  2. 🔧 Proven Troubleshooting Steps
  3. 🎯 Final Words

The fsck error 'currently, only 1 or 2 FATs are supported, not 34' occurs when trying to run the fsck command on a file system that uses the FAT32 file system. This error affects users who have corrupted their FAT32-formatted storage devices and want to recover data without reformatting them.

This error can be frustrating for users who need to access their files immediately. Fortunately, there are methods to fix this issue using fsck, allowing you to reuse the storage device without reformatting it.

⚠️ Common Causes

  • The primary reason for this error is that FAT32 has a limitation on the number of file allocation tables (FATs) supported. The maximum number of FATs supported by FAT32 is 2, which means that if you have more than 2 FATs on your storage device, fsck will not be able to recognize them.
  • Another possible reason for this error is that the FAT32 file system has become corrupted, causing fsck to misinterpret the number of FATs supported.

🔧 Proven Troubleshooting Steps

Fixing FAT32 Corruption using fsck

  1. Step 1: Step 1: Identify the FATs on your storage device. You can use the 'fsck -L' option with fsck to list all file systems on your system, including those that may be corrupted or hidden. This will help you identify which FATs are causing the error.
  2. Step 2: Step 2: Use the 'fsck -C' option with fsck to scan the storage device for errors and fix them. This option allows fsck to detect and repair corruption in the FATs, allowing you to reuse the storage device without reformatting it.
  3. Step 3: Step 3: Once fsck has finished scanning and repairing the FATs, use the 'fsck -b' option with fsck to verify that the file system is now healthy. If all tests pass, you can safely reuse the storage device.

Alternative Fix Method using dd

  1. Step 1: Step 1: Create a backup of your data on another storage device or in an external location. This will ensure that your files are safe even if fsck fails to fix the FATs.
  2. Step 2: Step 2: Use the 'dd' command with the '-c' option to create a new, healthy FAT32 file system on the corrupted storage device. This will overwrite any existing data on the device and replace it with a fresh, healthy FAT32 file system.

🎯 Final Words

By following one of these methods, you should be able to fix the fsck error 'currently, only 1 or 2 FATs are supported, not 34' and reuse your corrupted storage device without reformatting it. Remember to always back up your data before attempting any file system repairs to ensure that your files remain safe.

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