---
title: SBCModePageRigidDiskGeometry
framework: IOKit
role: symbol
role_heading: Structure
platforms: [Mac Catalyst 13.0+, macOS 10.3+]
path: iokit/sbcmodepagerigiddiskgeometry
---

# SBCModePageRigidDiskGeometry

## Declaration

```occ
typedef struct SBCModePageRigidDiskGeometry {
    ...
} SBCModePageRigidDiskGeometry;
```

## Overview

Overview Rigid Disk Geometry Mode Page (PAGE CODE 0x04) format.

## Topics

### Instance Properties

- [DEVICE_STEP_RATE](iokit/sbcmodepagerigiddiskgeometry/1555527-device_step_rate.md)
- [LANDING_ZONE_CYLINDER](iokit/sbcmodepagerigiddiskgeometry/1555515-landing_zone_cylinder.md)
- [MEDIUM_ROTATION_RATE](iokit/sbcmodepagerigiddiskgeometry/1555464-medium_rotation_rate.md)
- [NUMBER_OF_CYLINDERS](iokit/sbcmodepagerigiddiskgeometry/1555552-number_of_cylinders.md)
- [NUMBER_OF_HEADS](iokit/sbcmodepagerigiddiskgeometry/1555491-number_of_heads.md)
- [RESERVED](iokit/sbcmodepagerigiddiskgeometry/1555561-reserved.md)
- [RESERVED1](iokit/sbcmodepagerigiddiskgeometry/1555513-reserved1.md)
- [ROTATIONAL_OFFSET](iokit/sbcmodepagerigiddiskgeometry/1555467-rotational_offset.md)
- [RPL](iokit/sbcmodepagerigiddiskgeometry/1555500-rpl.md)
- [STARTING_CYLINDER_REDUCED_WRITE_CURRENT](iokit/sbcmodepagerigiddiskgeometry/1555565-starting_cylinder_reduced_write_.md)
- [STARTING_CYLINDER_WRITE_PRECOMPENSATION](iokit/sbcmodepagerigiddiskgeometry/1555506-starting_cylinder_write_precompe.md)
- [header](iokit/sbcmodepagerigiddiskgeometry/1555435-header.md)