You are troubleshooting a storage environment using HPE Alletra Storage MP B10000 in a Peer Persistence configuration. A customer reports high latency when accessing data from applications. When reviewing the MPIO path status on the host, what should be the path status for connections to the storage array located in the remote data center?

HPE Alletra Storage MP in a Peer Persistence configuration utilizes Asymmetric Logical Unit Access (ALUA) to manage host pathing. This protocol allows the storage array to inform the host about the optimal paths for I/O. Paths to the local (primary) array are designated as "Active/Optimized" due to their low latency. Paths to the remote (secondary) array, which traverse an inter-site link and thus have higher latency, are designated as "Active/Non-optimized." This ensures that under normal conditions, all I/O is directed to the local array for the best performance, while the remote paths remain online and ready for a transparent failover if required.

A. Active Optimized: This status is exclusively for the low-latency paths connecting the host to the local storage array, which is the preferred target for I/O operations.
B. Passive: This state is not used in an ALUA-based Peer Persistence configuration. The remote paths are active, not passive, to enable immediate I/O redirection during a failover.
D. Standby: Similar to "Passive," this is not the correct ALUA state. The paths are actively presented to the host and are ready to service I/O, just not as the primary choice.

1. HPE Alletra Storage MP for Block Storage Best Practices Guide. (Document ID: a00136413enw, Published: May 2023).

Page 21, Section: Peer Persistence: "The host multipathing software will mark the paths to the primary array as active/optimized and the paths to the secondary array as active/non-optimized. This ensures that I/O is always serviced by the primary array for the best performance."

2. HPE Peer Persistence for HPE Alletra 9000, HPE Primera, and HPE 3PAR storage Technical white paper. (Document ID: a00026383enw, Published: September 2022).

Page 7, Section: Host I/O path management with ALUA: "The host multipathing software will mark the paths to the primary array as active/optimized and the paths to the secondary array as active/non-optimized." This section explicitly details the ALUA states for primary and secondary paths in a Peer Persistence setup.