---
title: physicalBlockSize
framework: fskit
role: symbol
role_heading: Instance Property
path: fskit/fsblockdeviceresource/physicalblocksize
---

# physicalBlockSize

The sector size of the device.

## Declaration

```swift
var physicalBlockSize: UInt64 { get }
```

## Discussion

Discussion This is equivalent to the DKIOCGETPHYSICALBLOCKSIZE device parameter.

## See Also

### Accessing resource properties

- [bsdName](fskit/fsblockdeviceresource/bsdname.md)
- [isWritable](fskit/fsblockdeviceresource/iswritable.md)
- [blockCount](fskit/fsblockdeviceresource/blockcount.md)
- [blockSize](fskit/fsblockdeviceresource/blocksize.md)