Now Days due to huge expansion on storage requirement in the industry, peoples are moving towards SAN. As the SAN is known for High-Availability with NPOSF (No Point Of Single Failure) it has a mechanism which can make visible the same storage device from more than one path to the host and to manage the multipath we need a software in the Host end which can tackle the switchover.
DMP Package in Veritas Volume Manager
Version 4.3 à ASL DMP (Array Support Library Dynamic Multipathing)
Version 5.0 and Above à DMP (Dynamic Multipathing ) DSM (Device Specific Module)
Open Command Prompt
Run a command: vxlicrep | find “DMP”
And also you can run a command: vxdmpadm dsminfo
SCSI-2 = Active / Passive
SCSI-3= Active / Active
These settings can be setup from Storage end in the FA level or Device Level and in case of clusters SCSI-3 is used in Windows.
You can go to the VEA console and check the paths of the devices
Thanks for Reading – Put you comments and suggestions