---
title: fNativeBlockSize
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [driverkit 22.0+, Mac Catalyst 13.0+, macOS 10.12.2+]
path: iokit/scsicmd_inquiry_pagec0_data/2721368-fnativeblocksize
---

# fNativeBlockSize

## Declaration

```occ
UInt32 fNativeBlockSize;
```