---
title: writeCD
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/iocdmedia/3516776-writecd
---

# writeCD

## Declaration

```occ
virtual IOReturn writeCD(IOService *client, UInt64 byteStart, IOMemoryDescriptor *buffer, CDSectorArea sectorArea, CDSectorType sectorType, IOStorageAttributes *attributes, UInt64 *actualByteCount);
```