data path protection to a redundant in a is accomplished with the feature and the driver in the Windows operating system (OS) and in the Linux OS.
AVT is a built-in feature of the RAID controller module that permits ownership of a virtual disk to be transferred to a second RAID controller module if the preferred RAID controller module fails. When you use AVT with a multi-path driver, AVT helps to make sure that an I/O data path always is available for the in the storage array.
If a component such as a RAID controller module, a cable, or an fails, or an error occurs on the data path to the preferred RAID controller module, AVT and the multi-path driver automatically transfer the and virtual disks to the alternate “non-preferred” RAID controller module for processing. This failure or error is called a .
Multi-path drivers such as MPIO and RDAC are installed on host computers that access the storage array and provide I/O path failover. The multi-path driver (MPIO in the Windows OS and RDAC in the Linux OS) is used for failover. The AVT feature is used specifically for single-port cluster failover. The AVT feature mode is automatically selected by host type.
Note:
You should have the multi-path driver installed at all times.During a failover, the virtual disk transfer is logged as a critical event. You can configure the alert destinations for the storage array to send an alert notification automatically.