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Reference for Oracle Solaris Cluster 4.4

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Updated: August 2018

scgdevs (8)


scgdevs - global devices namespace administration script




Note -  Oracle Solaris Cluster software includes an object-oriented command set. Although Oracle Solaris Cluster software still supports the original command set, Oracle Solaris Cluster procedural documentation uses only the object-oriented command set. For more information about the object-oriented command set, see the Intro(8CL) man page.

The scgdevs command manages the global devices namespace. The global devices namespace is mounted under the /global directory and consists of a set of logical links to physical devices. As the /dev/global directory is visible to each node of the cluster, each physical device is visible across the cluster. This fact means that any disk, tape, or CD-ROM that is added to the global-devices namespace can be accessed from any node in the cluster.

The scgdevs command enables you to attach new global devices (for example, tape drives, CD-ROM drives, and disk drives) to the global-devices namespace without requiring a system reboot. You must run the devfsadm command before you run the scgdevs command.

Alternatively, you can perform a reconfiguration reboot to rebuild the global namespace and attach new global devices. See the boot(8) man page for more information about reconfiguration reboots.

You must run this command from a node that is a current cluster member. If you run this command from a node that is not a cluster member, the command exits with an error code and leaves the system state unchanged.

You can use this command only in the global zone.

You need solaris.cluster.system.modify RBAC authorization to use this command. See the rbac(7) man page.

You must also be able to assume a role to which the Oracle Solaris Cluster Commands rights profile has been assigned to use this command. Authorized users can issue privileged Oracle Solaris Cluster commands on the command line from the pfsh, pfcsh, or pfksh profile shell. A profile shell is a special kind of shell that enables you to access privileged Oracle Solaris Cluster commands that are assigned to the Oracle Solaris Cluster Commands rights profile. A profile shell is launched when you run the su command to assume a role. You can also use the pfexec command to issue privileged Oracle Solaris Cluster commands.

Exit Status

The following exit values are returned:


The command completed successfully.


An error occurred. Error messages are displayed on the standard output.



Device nodes directory


Global devices nodes directory


Solaris Volume Manager metaset directory


See attributes(7) for descriptions of the following attributes:

Interface Stability

See Also

pfcsh(1), pfexec(1), pfksh(1), pfsh(1), Intro(8CL), cldevice(8CL), boot(8), devfsadm(8), su(8), did(4)

Administering an Oracle Solaris Cluster 4.4 Configuration


The scgdevs command, called from the local node, will perform its work on remote nodes asynchronously. Therefore, command completion on the local node does not necessarily mean that the command has completed its work cluster-wide.

This document does not constitute an API. The /global/.devices directory and the /devices directory might not exist or might have different contents or interpretations in a future release. The existence of this notice does not imply that any other documentation that lacks this notice constitutes an API. This interface should be considered an unstable interface.