---
name: "defrag.exfat"
section: "8"
platform: "linux"
package: "exfatprogs"
version: "1.4.3-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/defrag.exfat"
---

# defrag.exfat(8)

Defragment or assess fragmentation on an exFAT filesystem

## NAME

defrag.exfat - Defragment or assess fragmentation on an exFAT filesystem

## SYNOPSIS

**defrag.exfat** \[**-f** \| **-a**\] *device*

**defrag.exfat** **-h** \| **--help**

**defrag.exfat** **-v** \| **--version**

## DESCRIPTION

**defrag.exfat** is a utility to defragment files on an exFAT-formatted device or assess its fragmentation status.

When no option is specified, the tool warns the user to run **fsck.exfat** first for filesystem consistency.

This safety prompt can be bypassed using the **-f** option.

The **-a** option enables assessment mode, which analyzes fragmentation without modifying the filesystem.

**defrag.exfat** provides whole-disk defragmentation based on cluster swapping, which incurs a certain amount of wear overhead on flash-based storage devices with low fragmentation levels.

Therefore, it is recommended to use **defrag.exfat** on mechanical hard disk drives (HDDs) or flash-based devices that exhibit a relatively high degree of fragmentation.

## OPTIONS

- **-f, --force**

  Perform defragmentation without prompting the fsck warning. Use with caution.

- **-a, --assessment**

  Assess the fragmentation status of the exFAT volume without making any changes.

- **-v, --version**

  Display version information and exit.

- **-h, --help**

  Show usage information and exit.

## EXAMPLES

Defragment an unmounted exFAT device (with safety warning):

```
$ defrag.exfat /dev/sda1
```

Defragment without prompting (force mode):

```
$ defrag.exfat -f /dev/sda1
```

Assess fragmentation status (read-only):

```
$ defrag.exfat -a /dev/sda1
```

Show version:

```
$ defrag.exfat -v
```

Show help:

```
$ defrag.exfat -h
```

## NOTES

Before defragmentation:

- \-

  The target device must be **unmounted**.

- \-

  Please run **fsck.exfat** on the target device to ensure filesystem integrity.

- \-

  Considering the potential risks of defragmentation, critical data should be **backed up** in advance.

During defragmentation:

- \-

  Always keep the device **connected and powered**.

- \-

  If the device is removed, powered off, or experiences a hardware failure, the filesystem may become corrupted.