> [!CopyFileWrite] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_io_copyfile_write.png"></td><td><b>Wait Category</b></td><td>IO</td></tr><tr><td><b>Mechanism</b></td><td><code>CopyFileWrite</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>Outbound Data Stream</b>. This event is triggered when the engine is waiting for the target disk to acknowledge a write operation during a file copy, indicating a bottleneck in the destination storage system.</td></tr></table>