ERROR_COMPRESSION_DISABLED - 769 (0x301)
Compression is disabled for this volume.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_COMPRESSION_DISABLED error code indicates that the volume in question does not support or has compression disabled. This can occur when attempting to enable, disable, or manage file system compression on a volume where it is not supported.
Error Details
This error typically arises from operations related to file system compression settings. It signifies that the current state of the volume prevents any form of compression-related actions such as enabling, disabling, or querying the compression status.
Usage Context
The ERROR_COMPRESSION_DISABLED can be encountered in various scenarios, including:
- Attempting to enable compression on a volume where it is not supported.
- Querying the current state of compression when it is disabled.
- Executing operations that require compression support but are being performed on an unsupported volume.
Developer Interpretation
Developers should interpret this error as indicating that the requested operation cannot be completed due to the lack of support for file system compression. This could mean that the volume type, such as a read-only volume or a specific file system format, does not allow for compression settings to be changed or queried.
Related Errors
ERROR_NOT_SUPPORTED(50)ERROR_INVALID_PARAMETER(87)ERROR_VOLUME_READ_ONLY(163)
FAQ
Q: Why do I receive this error when trying to enable compression on a volume?
A: The volume does not support file system compression, or it is currently in a state where such operations are prohibited.
Q: Can this error occur on all types of volumes?
A: No, the ERROR_COMPRESSION_DISABLED can only be encountered on volumes that do not natively support compression. This includes certain file systems and volume types.
Summary
The ERROR_COMPRESSION_DISABLED (769) is a specific error code indicating that the requested operation cannot proceed due to the lack of support for file system compression on the specified volume. Developers should ensure that their operations are compatible with the underlying file system before attempting to manage compression settings.