What should run on servers that share access to the same P2000 G3 MSA storage LUN to preserve data integrity?

Virtualization software manages virtual machine execution and resources but does not manage the physical multipath I/O required to prevent data corruption on a shared SAN LUN.

LUN provisioning tools are used to create and assign storage volumes to hosts, not to manage concurrent multipath access or coordinate I/O paths during normal operations.

MPIO (Multipath I/O) with a Device Specific Module (DSM) is required because without it, each HBA path to the shared LUN appears as a separate disk to the operating system, which can cause conflicting writes and data corruption. The HP-provided DSM for the P2000 G3 tells the MPIO driver how to identify, group, and manage all physical paths to the same LUN as a single logical device. This coordination across paths is what preserves data integrity when multiple servers share the same storage volume.

Cluster software coordinates application-level failover and resource ownership between nodes but operates above the storage layer and does not replace MPIO DSM for managing physical path multiplicity to the array.