---
title: doAsyncReadWrite
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/ioreducedblockservices/3516741-doasyncreadwrite
---

# doAsyncReadWrite

## Declaration

```occ
virtual IOReturn doAsyncReadWrite(IOMemoryDescriptor *buffer, UInt64 block, UInt64 nblks, IOStorageCompletion completion);
```