> [!CopyFileRead] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_io_copyfile_read.png"></td><td><b>Wait Category</b></td><td>IO</td></tr><tr><td><b>Mechanism</b></td><td><code>CopyFileRead</code></td></tr><tr><td><b>Operations</b></td><td><a href="Operations/Other/FileOp">File Copy</a></td></tr><tr><td><b>Resources</b></td><td><a href="Resources/Disk">Disk</a></td></tr><tr><td colspan="3">Contention on <b>Inbound Data Stream</b>. This event indicates that the engine is stalled while reading data from the source file during a copy operation, often seen when the source disk is heavily loaded or I/O bandwidth is saturated.</td></tr></table>