---
title: readDiscStructure
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/iobdservices/1529437-readdiscstructure
---

# readDiscStructure

## Declaration

```occ
virtual IOReturn readDiscStructure(IOMemoryDescriptor *buffer, UInt8 structureFormat, UInt32 logicalBlockAddress, UInt8 layer, UInt8 agid, UInt8 mediaType);
```