12/24/2023 0 Comments Veritas cheatsheet![]() ![]() Use the enclosure attribute with getdmpnode to obtain a list of all DMP nodes for the specified enclosure.ĭisplays all DMP nodes in the same LUN group as the DMP node that is named as the argument to the dmpnodename attribute. nodename must be a valid path listed in the /dev directory. The physical path is specified as the argument to the nodename attribute. Lists the logical and physical names of a specified controller, or of all the controllers present in the system.ĭisplays the DMP device that controls a particular physical path. (A specified enclosure type must be an enclosure category that supported by DMP.)ĭisplays the default and current settings of the iosize, partitionsize or recoveryoption attributes for the specified enclosure, array or array type. The enable operation supports the attributes enclosure and type to specify an unambiguous path. When connecting Active/Passive disk arrays, using enable results in a failback of I/O to the primary path. ![]() (An array port can be specified either by the name of the enclosure and the array port ID, or by the worldwide name (WWN) identifier of the array port.) This operation succeeds only if the controller, path or array port is accessible to the host and I/O can be performed on it. (A specified enclosure type must be an enclosure category that supported by DMP.)Įnables I/O on a previously disabled path, or on all the paths that are connected to a specified HBA controller or array port. The disable operation supports the attributes enclosure and type to specify an unambiguous path. The following options may be used with the disable operation:Ĭhecks if the specified path is the last active path to the disk.įorcibly disables the last active path to the disk. The disable operation fails with an error if it is applied to a controller that is connected to the disk through a single path. The command blocks until all pending I/O that was issued through the specified disk controller or path has been completed. Depending on the number of pending I/O requests, this command can take some time to complete before returning control to the user. (An array port can be specified either by the name of the enclosure and the array port ID, or by the worldwide name (WWN) identifier of the array port.) This prevents DMP from issuing I/O requests through the specified controller, path or array port. This allows an older version of an APM to be used instead of the latest version.ĭisables I/O on a specified path, or on all the paths that are conected to a specified HBA controller or array port. One of the following options may be specified for configuring the APM:Īdds a vendor-supplied APM and configures it. If the current APM does not support certain arrays, DMP refers to the APM with the next lowest version number. ![]() DMP refers to the latest version of APM that is available to it. An APM is a dynamically loadable kernel module that is developed by array vendors for the supported array. Vxdmpadm keywords select the action to perform, and attributes specify the objects on which the action is performed.Ĭonfigures the specified array policy module (APM) together with any required attribute-value pairs that specify its operation. vxdmpadm lists the paths under a DMP device, gets the DMP device corresponding to a path, lists all the disk controllers on the system, lists all the paths through an HBA controller, lists all the DMP nodes through a disk array, and enables or disables I/O through a HBA controller on the system. The vxdmpadm utility is an administrative interface to the Veritas Volume Manager (VxVM) Dynamic Multipathing (DMP) facility. ![]()
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