| DEV(4FS) | File Systems | DEV(4FS) |
dev — Device name
file system
The dev filesystem manages the name spaces
of devices in the operating system. The global zone's instance of the
dev filesystem is mounted during boot on
/dev. This filesystem is colloquially called
‘sdev’ as a way to distinguish it from the
devfs(4FS) filesystem mounted at
/devices.
A subdirectory under /dev may have unique operational semantics. Most of the common device names under /dev are created automatically by devfsadm(8) Others, such as /dev/pts, /dev/net, and /dev/zvol are dynamic and reflect the operational state of the system. You can manually generate device names for newly attached hardware by invoking devfsadm(8) or implicitly, by indirectly causing a lookup or readdir operation in the filesystem to occur. For example, you can discover a disk that was attached when the system was powered down (and generate a name for that device) by invoking format(8).
In a non-global zone, the dev filesystem
is also mounted at /dev; however, it is generally
speaking read-only. Unlike in the global zone, a privileged user in a
non-global zone cannot create directories or files, directories, or other
objects within the filesystem.
dev filesystem in the global
zone and non-global zones.The global /dev instance cannot be unmounted.
| March 10, 2023 | OmniOS |