chio.conf(5)

chio.conf5

Medium changer configuration file

Overview

chio.conf is used to configure some aspects of chio(1), a medium changer.

The configuration file consists of a series of stanzas, one per changer, enclosed in curly braces. Empty lines and lines beginning with ‘#’ in either file are ignored.

The following aspects may be configured:

drive

Provides a non-default mapping between st(4) devices and changer drives. For example, to map drive 0 to rst3 and drive 1 to rst2, for changer /dev/ch0:

changer ch0 {
	drive rst3
	drive rst2
}

Files

/dev/ch0

Default changer device.

/etc/chio.conf

Default location for chio(1) configuration file.

/etc/examples/chio.conf

Example configuration file.

Releases

39 releases since OpenBSD 4.3; the text changed 1 time.

  1. 4.3–6.6
  2. 6.7–8.0

History

The chio.conf file format first appeared in OpenBSD 4.0.

From man 8.0-current-20261101 in OpenBSD 8.0-current (2026-11-01). Parsed by carta from the page's mdoc source.