---
title: doAsyncReadWrite
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/ioblockstorageservices/1579924-doasyncreadwrite
---

# doAsyncReadWrite

## Declaration

```occ
virtual IOReturn doAsyncReadWrite(IOMemoryDescriptor *buffer, UInt32 block, UInt32 nblks, IOStorageCompletion completion);
```