---
title: ALTERNATE_TRACKS_PER_LOGICAL_UNIT
framework: Kernel
role: symbol
role_heading: Instance Property
platforms: [macOS 10.3+]
path: kernel/sbcmodepageformatdevice/1476309-alternate_tracks_per_logical_uni
---

# ALTERNATE_TRACKS_PER_LOGICAL_UNIT

## Declaration

```occ
UInt16 ALTERNATE_TRACKS_PER_LOGICAL_UNIT;
```