---
title: readRZoneInfo
framework: kernel
role: pseudoSymbol
path: kernel/iodvdmedia/1811250-readrzoneinfo
---

# readRZoneInfo

## Declaration

```occ
virtual IOReturn readRZoneInfo(
 IOMemoryDescriptor *buffer, 
 UInt32address, 
 DVDRZoneInfoAddressTypeaddressType, 
 UInt16 *actualByteCount ); 
```

## Parameters

- `buffer`: Buffer for the data transfer. The size of the buffer implies the size of the data transfer.
- `address`: As documented by MMC.
- `addressType`: As documented by MMC.
- `actualByteCount`: Returns the actual number of bytes transferred in the data transfer.

## Return Value

Return Value Returns the status of the data transfer.

## Overview

Overview Issue an MMC READ RZONE INFORMATION (READ TRACK INFORMATION) command.

## See Also

### Miscellaneous

- [getSpeed](kernel/iodvdmedia/1811144-getspeed.md)
- [readDiscInfo](kernel/iodvdmedia/1811197-readdiscinfo.md)
- [readStructure](kernel/iodvdmedia/1811277-readstructure.md)
- [reportKey](kernel/iodvdmedia/1811294-reportkey.md)
- [sendKey](kernel/iodvdmedia/1811314-sendkey.md)
- [setSpeed](kernel/iodvdmedia/1811329-setspeed.md)