---
title: extentrecord
framework: Kernel
role: symbol
role_heading: Structure
platforms: [macOS 10.0+]
path: kernel/extentrecord
---

# extentrecord

## Declaration

```occ
typedef struct diskextent {
    ...
} extentrecord;
```

## Topics

### Instance Properties

- [blockcount](kernel/extentrecord/1555211-blockcount.md)
- [startblock](kernel/extentrecord/1555293-startblock.md)