devname(7)                                                       devname(7)

NAME
     devname - device naming conventions

DESCRIPTION
     Specific conventions are used to assign device names. When a utility
     requires the devname to be used as a parameter (for example, dksetup),
     it requires the device name format described here. This devname format
     is not the same as the device node name or file system name for a
     device.

   Mass Storage and I/O Name Features
     The naming convention, described in the sections below, is applied to
     each current I/O mass storage subsystem. This convention has the bene-
     fit of simplicity of device-path names, consistency between the
     differing I/O subsystems and allows for future growth. Each name
     reveals the device's physical connection to the system as well as any
     specific attributes, such as the rewind device for tapes.

FEATURES
     The Reliant UNIX naming convention has the following features:

     Physical Association
          The name describes the physical device to the user. It uniquely
          corresponds to the device, and does not change if I/O devices are
          later added to, or deleted from the system.

     Large Configurations
          The device name accommodates large system configurations with
          hundreds of devices.

     Multiple I/O Buses
          The device naming supports configurations with multiple I/O
          buses. It unambiguously includes the bus number. For RM600-xx
          computers, the native bus is the System XTEND Bus 0.

     Multiple I/O Subsystems
          The device naming scheme is consistent across multiple I/O sub-
          systems.

     Simplicity
          The name used to describe the device should is as simple as pos-
          sible, with as few physical device descriptors as necessary.

FILES
     /dev/iosb/[r]stapeppu[c][h][n][o][v]
     /dev/iosb/[r]sdiskbcusp
     /dev/iosb/slpxx[r|c]

SEE ALSO
     mtio(7), sdisk(7), sgen(7), sjuke(7), stape(7), autoconf(8).





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