# kIOPropertySectorCountPerTrackKey ``` #define kIOPropertySectorCountPerTrackKey ``` ## Discussion This key is used to define the number of sectors per each track for a particular medium. Requirement: Mandatory element of the Rigid Disk Geometry dictionary. Example: ```objc Device Characteristics Vendor Name Apple Product Name iPod Product Revision Level 1.0 Rigid Disk Geometry Sector Count per Track 12345 ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)