HP StorageWorks Storage System Scripting Utility reference (September 2005)

DISK_GROUP=

The disk group name for where you want to create the virtual disk. The disk group must already exist

to use this switch. If not speciﬁed, the default disk group is used.

NO_WAIT_FOR_COMPLETION

This option returns control of the a rray while the virtual disk is being created and b efore it is complete.

OS_UNIT_ID=

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

PREFERRED_PATH=

The preferred controller path that is speciﬁed to handle all I/O for the virtual d isks. If a controller fails,

the path always reverts to the working controller.

• PATH_A_BOTH—Controller pa th A fails over to controller B. When controller A restarts, the virtual

disks fail back to controller A. This is failover/failback mode.

• PATH_A_FAILOVER—Controller path A fails over to controller B. When controller A restarts, the

virtual disks do not fail back to controller A. This is failover-only mode.

• PATH_B_BOTH— Controller path B fails over to controller A. When controller B restarts, the virtual

disks fail back to controller B. This is failover/failback mode.

• PATH_B_FAILOVER—Controller path B fails over to controller A. When controller B restarts, the

virtual disks do not fail back over to controller B. This is failover-only mode.

NOPREFERRE

D_PATH

Allows the I/O to be handled by either controller.

READ_CACHE

Reads are satisﬁed from the controller’s cache.

NOREAD_CAC

Reads are always satisﬁed from the physical disks, not the controller’s cache.

REDUNDANCY=

The amount of data protection set when cre ating the virtual disk. If not speciﬁed, the default is changed

to Vraid1.

• Vraid0—Provides no data protection. It distributes data among its member disks into stripes

and uses all mem bers 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 af ter it is

replaced.

WORLD_WIDE_LUN_NAME=

Sets the W

orld Wide LUN Name.

HP StorageWorks Storage System Scripting Utilit y reference