QSAN XN4 Series

The QSAN XN4 series is the workhorse of the new dual-active NVMe unified line. Sitting between the [XN3 series](/vendors/qsan/products/xn3-series) entry tier and the [XN5 series](/vendors/qsan/products/xn5-series) flagship, the XN4226 is purpose-built for growing Australian organisations that have outgrown single-controller storage but aren't ready for top-tier all-NVMe pricing. 26-bay NVMe in 2U with mirrored firmware HA and 99.9999%+ availability.

QSM 4 brings the full enterprise data-services suite — block plus file protocols on the same array, WORM, SED, XMirror multi-site sync, deduplication, compression, public-cloud backup, and the new cross-platform replication that bridges QSM 4 unified pools and XEVO 3 block arrays. Active dual-controller architecture means a controller event doesn't interrupt service; the second controller's mirrored firmware is already in sync.

The XN4 has the unusual distinction of being independently reviewed by StorageReview (a third-party benchmark publication) — QSAN doesn't typically court external reviewers, so the existence of an indexed independent review suggests the platform has been credibly benchmarked. For Australian post-production houses, mid-sized MSPs, healthcare imaging, and education-sector campus storage, this is the pragmatic mid-tier choice.