XM Satellite Radio AA-RU5HC-TE manual ADD Copy, Syntax, Switches

SSSU Command Reference

ADD COPY

Use the ADD COPY command to create a copy of the specified virtual disk. A copy is a new virtual disk family. The ADD COPY command is equivalent to creating a snapclone within Command View EVA.

Syntax

ADD COPY <copy_name> VDISK=<vdisk_family>

Switches

The following switches are available with the ADD COPY command.

DISK_GROUP=

This is the name of the disk group where you want to create the virtual disk copy. The disk group must already exist to use this switch. If not specified, SSSU uses the same group as the source VDISK.

OS_UNIT_ID=

The ID that is presented to the host operating system. If set to zero, no ID is presented to the host.

REDUNDANCY=

The amount of data protection set when creating the virtual disk. If not specified, the default is Vraid0.

■Vraid0—Provides no data protection. It distributes data among its member disks into stripes and uses all members to process I/O requests. This method has no overhead associated with duplication of information and provides the highest performance.

■Vraid1—Provides the highest level of data protection but uses the most space. It duplicates data written to one disk onto a backup disk. In a multidisk configuration, Vraid1 mirrors each pair of disks to each other. These disk pairs can then be striped to create a virtual disk.

■Vraid5—Provides a moderate level of data protection. This method distributes the parity information among all disk members. If one drive fails, the failed disk can be recreated after it is replaced.

30 Command View EVA Storage System Scripting Utility Reference Guide