---
title: JournalInfoBlock
framework: Kernel
role: symbol
role_heading: Structure
platforms: [macOS 10.6+]
path: kernel/journalinfoblock
---

# JournalInfoBlock

## Declaration

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

## Topics

### Instance Properties

- [device_signature](kernel/journalinfoblock/1578138-device_signature.md)
- [ext_jnl_uuid](kernel/journalinfoblock/1577948-ext_jnl_uuid.md)
- [flags](kernel/journalinfoblock/1578075-flags.md)
- [machine_serial_num](kernel/journalinfoblock/1578108-machine_serial_num.md)
- [offset](kernel/journalinfoblock/1577876-offset.md)
- [reserved](kernel/journalinfoblock/1577952-reserved.md)
- [size](kernel/journalinfoblock/1578098-size.md)