scconf_dg_svm(1M)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | SEE ALSO | ATTRIBUTES

NAME

scconf_dg_svm– change Solaris Volume Manager disk device group configuration.

SYNOPSIS

scconf -c -D [generic_options]

DESCRIPTION

A Solaris Volume Manager disk device group is defined by a name, the nodes upon which this group can be accessed, a global list of devices in the diskset, and a set of properties used to control actions such as potential primary preference and failback behavior.

For Solaris Volume Manager disk device groups, only one diskset may be assigned to a disk device group, and the group name must always match the name of the diskset itself.

Solaris Volume Manager has the concept of a multihosted or shared diskset, which is a grouping of two or more hosts and disk drives which are accessible by all hosts and have the same device names on all hosts. This identical device naming requirement is achieved by using the raw disk devices to form the diskset. The Disk ID pseudo driver (DID) allows multihosted disks to have consistent names across the cluster. Only hosts already configured as part of a diskset itself can be configured into the nodelist of a Solaris Volume Manager device group. At the time drives are added to a shared diskset, they must not belong to any other shared diskset.

The Solaris Volume Manager metaset(1M) command creates the diskset, which also initially creates and registers it as a Solaris Volume Manager device group. Next, you must use the scconf(1M) command to set the node preference list, the preferenced, failback and numsecondaries suboptions.

If you want to change the order of node preference list or the failback mode, you must specify all the nodes that currenly exist in the device group in the nodelist. In addition, if you are changing the the order of node preference, you must also set the preferenced suboption to true.

If the preferenced suboption is not specified with the "change", the already established true or false setting is used.

The scconf command cannot be used to remove the Solaris Volume Manager device group from the cluster configuration, the Solaris Volume Manager metaset command is used to do this. You remove a disk device group by removing the Solaris Volume Manager diskset.

OPTIONS

See scconf(1M) for the list of supported generic options. See metaset(1M) for the list of metaset related commands to create and remove disksets and disk device groups.

Only one action option is allowed in the command. The following action options are supported.

-c

Change the ordering of the node preference list, change preference and failback policy, and change the desired number of secondaries.

EXAMPLES

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Example 1 Creating and Registering a Diskset




The following metaset commands create a diskset and register the diskset as a Solaris Volume Manager device group.

Next, the scconf command is used to specify the order of the potential primary nodes for the device group, change the preferenced and failback options, and change the desired number of secondaries.

phys-host# metaset -s diskset1 -a -h host1 host2 phys-host# scconf -c -D name=diskset1,nodelist=host2:host1, preferenced=true,failback=disabled,numsecondaries=1

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SEE ALSO

scconf(1M), metaset(1M), attributes(5)

ATTRIBUTES

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Availability	SUNWcsu

Sun Cluster 3.1  Last Revised 26 July 2002

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | EXAMPLES | SEE ALSO | ATTRIBUTES