---
title: readDiscStructure
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/iobdblockstoragedevice/1541740-readdiscstructure
---

# readDiscStructure

## Declaration

```occ
virtual IOReturn readDiscStructure(IOMemoryDescriptor *buffer, UInt8 format, UInt32 address, UInt8 layer, UInt8 grantID, UInt8 type);
```