---
title: readCD
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/iocdblockstoragedriver/1572095-readcd
---

# readCD

## Declaration

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