---
title: specinfo
framework: Kernel
role: symbol
platforms: [macOS 10.8+]
path: kernel/specinfo
---

# specinfo

## Declaration

```occ
struct specinfo {
    ...
};
```

## Topics

### Instance Properties

- [si_devbsdunit](kernel/specinfo/1520853-si_devbsdunit.md)
- [si_devsize](kernel/specinfo/1520812-si_devsize.md)
- [si_flags](kernel/specinfo/1520795-si_flags.md)
- [si_hashchain](kernel/specinfo/1520760-si_hashchain.md)
- [si_initted](kernel/specinfo/1520836-si_initted.md)
- [si_isssd](kernel/specinfo/1520758-si_isssd.md)
- [si_lastr](kernel/specinfo/1520792-si_lastr.md)
- [si_opencount](kernel/specinfo/1520811-si_opencount.md)
- [si_rdev](kernel/specinfo/1520768-si_rdev.md)
- [si_size](kernel/specinfo/1520789-si_size.md)
- [si_specnext](kernel/specinfo/1520766-si_specnext.md)
- [si_throttle_mask](kernel/specinfo/1520807-si_throttle_mask.md)
- [si_throttleable](kernel/specinfo/1520825-si_throttleable.md)
- [si_mountingowner](kernel/specinfo/4206866-si_mountingowner.md)