SSSU Command Reference

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.

VDISK=

The source virtual disk for this snapshot.

WORLD_WIDE_LUN_NAME=

Sets the World Wide LUN Name.

Required switch

The following switch is required with the ADD SNAPSHOT command:

VDISK=

Examples

ADD SNAPSHOT payroll_backup VDISK="\Virtual

Disks\payroll\ACTIVE" ALLOCATION_POLICY=DEMAND

ADD SNAPSHOT wed_nite_biz VDISK="\Virtual

Disks\daily_biz\ACTIVE" ALLOCATION_POLICY=FULLY

The first example creates a snapshot payroll_backup from the ACTIVE partition of Vdisk family payroll that uses capacity only as needed.

The second example creates a snapshot wed_night_biz from the ACTIVE partition of the family daily_biz while reserving all capacity necessary to create the snapshot.

Note: To delete snapshots created by ADD SNAPSHOT, use the DELETE VDISK command.

Command View EVA Storage System Scripting Utility Reference Guide

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XM Satellite Radio AA-RU5HC-TE manual Source virtual disk for this snapshot