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SSSU Command Reference

45

Command View EVA Storage System Scripting Utility Reference Guide

NOMIRRORED_WRITEBACK

No writes are stored in mirrored caches. After the data is stored in one cache, the 
write is complete. The write is complete even if a mirror copy of the cache is not 
available.

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 
disks. If a controller fails, the path always reverts to the working controller.

■

PATH_A_BOTH—Controller path 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 over 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.

NOPREFERRED_PATH

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

READ_CACHE

Reads are satisfied from the controller’s cache.

NOREAD_CACHE

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

REDUNDANCY=

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