---
title: READ_SUB_CHANNEL
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/ioscsimultimediacommandsdevice/1576342-read_sub_channel
---

# READ_SUB_CHANNEL

## Declaration

```occ
virtual bool READ_SUB_CHANNEL(SCSITaskIdentifier request, IOMemoryDescriptor *dataBuffer, SCSICmdField1Bit MSF, SCSICmdField1Bit SUBQ, SCSICmdField1Byte SUB_CHANNEL_PARAMETER_LIST, SCSICmdField1Byte TRACK_NUMBER, SCSICmdField2Byte ALLOCATION_LENGTH, SCSICmdField1Byte CONTROL);
```