---
title: READ_CAPACITY_16
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/ioscsiblockcommandsdevice/1521981-read_capacity_16
---

# READ_CAPACITY_16

## Declaration

```occ
bool READ_CAPACITY_16(SCSITaskIdentifier request, IOMemoryDescriptor *dataBuffer, SCSICmdField8Byte LOGICAL_BLOCK_ADDRESS, SCSICmdField4Byte ALLOCATION_LENGTH, SCSICmdField1Bit PMI, SCSICmdField1Byte CONTROL);
```