A customer intentionally removes all three drives from a JBOF from an HPE Alletra MP...

The HPE Alletra MP X10000, which powers HPE GreenLake for File Storage, utilizes a disaggregated shared-everything (DASE) architecture based on VAST Data software. Unlike traditional RAID, this architecture uses highly advanced locally decodable erasure coding.

While the system is designed to be incredibly resilient—often surviving multiple concurrent drive failures across the cluster—the removal of three drives simultaneously from a single JBOF (Just a Bunch of Flash) chassis can exceed the immediate "vertical" stripe protection thresholds, especially in smaller cluster configurations. In the Alletra MP File architecture, the metadata and data are distributed with specific redundancy parameters. Intentionally pulling three drives at once is treated as a multi-point catastrophic failure rather than a standard drive wear-out event.

When such an event occurs, the system enters a "Fail-Stop" state to protect data integrity and prevent file system corruption. Because the system cannot guarantee the consistency of the data stripes or the underlying V-Trees (metadata structures), it will cease I/O services. Simply reinserting the drives (Option B) will not automatically bring the file system back online because the system likely marked those drives as "failed" or "stale" the moment they were removed. Recovery requires HPE Level 3 Support and Engineering to perform a manual "forced mount" or metadata reconstruction process to verify that no partial writes occurred during the removal. This is a high-touch recovery scenario designed to ensure that when the data becomes available again, it is 100% consistent.