ERROR_OFFLOAD_READ_FILE_NOT_SUPPORTED - 4442 (0x115A)
The copy offload read operation is not supported for the file.
Updated: Feb 21, 2026
Technical Meaning
The ERROR_OFFLOAD_READ_FILE_NOT_SUPPORTED error code indicates that the system does not support performing a copy offload read operation on the specified file. This means that the requested operation cannot be executed due to limitations in the file system or storage subsystem.
Error Details
This error is specific to operations involving copy offloading, which is a feature designed to improve performance by offloading data transfer tasks from the application to the storage controller. The error suggests that either the file system or the underlying storage device does not support this operation for the specified file.
Usage Context
Copy offload read operations are typically used in scenarios where large amounts of data need to be transferred, and performance is a critical factor. This could include backup systems, data replication tools, or other high-throughput applications that rely on efficient data transfer mechanisms.
Developer Interpretation
Developers should interpret this error as an indication that the requested operation cannot proceed due to unsupported capabilities in the current environment. It may be necessary to modify the application logic to handle such cases gracefully, possibly by falling back to a non-offload read method or by ensuring that only supported files are processed.
Related Errors
ERROR_FILE_NOT_FOUND(0x3)ERROR_INVALID_PARAMETER(0xC)ERROR_ACCESS_DENIED(0x5)
These errors might be encountered in similar scenarios where file operations fail due to unsupported conditions or invalid parameters.
FAQ
Q: What does the ERROR_OFFLOAD_READ_FILE_NOT_SUPPORTED error mean?
A: It indicates that the system cannot perform a copy offload read operation on the specified file, likely due to limitations in the file system or storage subsystem.
Q: How can I handle this error in my application?
A: You should check if the file supports offload operations and handle cases where it does not. Consider using alternative methods for data transfer if necessary.
Summary
The ERROR_OFFLOAD_READ_FILE_NOT_SUPPORTED error code is a specific indication that copy offload read operations are not supported for the specified file. Developers must ensure their applications can gracefully handle such errors by checking and adapting to the capabilities of the underlying system.