XM Satellite Radio AA-RU5HC-TE manual Size=

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.

SIZE=

This is a required switch. Size of the storage to be created. You can specify size in whole gigabytes only, and fractions are not allowed (1 GB – 2000 GB, limited by the actual amount of space available within the disk group).

WORLD_WIDE_LUN_NAME=

Sets the World Wide LUN Name.

Note: This switch is commonly used to allow a host to point to a new version of the virtual disk by giving the new virtual disk the same WWN as the old virtual disk.

WRITE_PROTECT

Does not allow writing to the virtual disk for all presented LUNs/host.

NOWRITE_PROTECT

Allows writing to the virtual disk for all presented LUNs/host.

WAIT_FOR_COMPLETION

Default. Waits until the command’s operation completes before displaying the next SSSU prompt (and returning control) or before running another script line. For large (greater than 1 TB) virtual disks, using this option can result in a long period before the prompt displays.

46 Command View EVA Storage System Scripting Utility Reference Guide