A customer is deploying a new grid across three data centers.

The required consistency level is strong-global, specifically using the Quorum strong-global semantics available in StorageGRID 12.0. NetApp defines strong-global as guaranteeing read-after-write consistency for client requests across all sites. With Quorum semantics enabled, a grid containing three or more sites can tolerate a site failure while continuing client operations, provided the required metadata replica quorum remains available.

This directly matches the scenario. NetApp's multisite resiliency guidance states that, for a three-or-more-site deployment using Quorum strong-global, a single site plus a single node failure can occur without interruption to operations or metadata consistency, assuming sufficient object-data protection remains under the ILM configuration.

Option A, all, is unsuitable because every metadata node must acknowledge the update; if a node or site is unavailable, the request fails. Option C, strong-site, only guarantees immediate consistency within one site and does not provide the required global consistency. Option D provides read-after-write consistency for new objects but only eventual consistency for updates, so it does not satisfy the requirement that data remain consistently available for all read and write activity.

Reference topics: StorageGRID 12.0 → S3 Consistency → Strong-global → Quorum Semantics → Multisite Failure Tolerance → Metadata Replication