---
title: OPTIMAL_UNMAP_GRANULARITY
framework: driverkit
role: symbol
role_heading: Instance Property
path: driverkit/scsicmd_inquiry_pageb0_data/optimal_unmap_granularity
---

# OPTIMAL_UNMAP_GRANULARITY

## Declaration

```occ
UInt32 OPTIMAL_UNMAP_GRANULARITY;
```