---
title: AsyncReadWrite
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/ioscsireducedblockcommandsdevice/1473305-asyncreadwrite
---

# AsyncReadWrite

## Declaration

```occ
virtual IOReturn AsyncReadWrite(IOMemoryDescriptor *buffer, UInt64 block, UInt64 nblks, void *clientData);
```