---
title: readCD
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/iocdmedia/3516775-readcd
---

# readCD

## Declaration

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