---
name: "diskarbitrationd"
section: "8"
platform: "macos"
package: "DiskArbitration"
version: "535.120.1.0.1"
release: "macOS 26.5"
platforms: ["macos"]
url: "https://new.carta.tech/diskarbitrationd"
---

# diskarbitrationd(8)

disk arbitration daemon

## NAME

**diskarbitrationd** – disk arbitration daemon

## SYNOPSIS

**diskarbitrationd** \[**-d**\]

## DESCRIPTION

**diskarbitrationd** listens for connections from clients, notifies clients of the appearance of disks and filesystems, and governs the mounting of filesystems and the claiming of disks amongst clients.

**diskarbitrationd** is accessed via the Disk Arbitration framework. This command is not intended to be invoked directly.

Options:

- **-d**

  Report detailed information in */var/log/diskarbitrationd.log*.

The file */etc/fstab* is consulted for user-defined mount points, indexed by filesystem, in the mount point determination for a filesystem. Each filesystem can be identified by its UUID or by its label, using the constructs \`\`UUID'' or \`\`LABEL'', respectively. For example:

```
UUID=DF000C7E-AE0C-3B15-B730-DFD2EF15CB91 /export ufs   ro
UUID=FAB060E9-79F7-33FF-BE85-E1D3ABD3EDEA none    hfs   rw,noauto
LABEL=The\040Volume\040Name\040Is\040This none    msdos ro
```

## FILES

- */etc/fstab*

  - */var/log/diskarbitrationd.log*

  - */var/run/diskarbitrationd.pid*

  - */System/Library/LaunchDaemons/com.apple.diskarbitrationd.plist*

  ## SEE ALSO

[fstab(5)](/fstab/5.md)