---
title: Block0
framework: IOKit
role: symbol
role_heading: Structure
platforms: [Mac Catalyst 13.0+, macOS 10.0+]
path: iokit/block0
---

# Block0

## Declaration

```occ
typedef struct Block0 {
    ...
} Block0;
```

## Topics

### Instance Properties

- [sbBlkCount](iokit/block0/1528469-sbblkcount.md)
- [sbBlkSize](iokit/block0/1528456-sbblksize.md)
- [sbDevId](iokit/block0/1528470-sbdevid.md)
- [sbDevType](iokit/block0/1528406-sbdevtype.md)
- [sbDrvrCount](iokit/block0/1528467-sbdrvrcount.md)
- [sbDrvrData](iokit/block0/1528422-sbdrvrdata.md)
- [sbDrvrMap](iokit/block0/1528443-sbdrvrmap.md)
- [sbReserved](iokit/block0/1528405-sbreserved.md)
- [sbSig](iokit/block0/1528429-sbsig.md)