zone-random-write-area · unknown · also ZRWA

Zone Random Write Area

A Zone Random Write Area is an optional bounded region associated with a ZNS zone that permits non-sequential writes.

Related Observatory article: Zone Random Write Area on hesela.com

Support and allocation are separate requirements. The window starts at the write pointer and can accept overwrites within it. A ZRWA flush advances the pointer; ordinary writes within the window need not. Zone Append is rejected while the zone has an associated ZRWA. [1]

Revision 1.5 requires an implicit ZRWA flush even when its triggering write fails. Flushed unwritten blocks remain unwritten: pointer progress does not count valid records. Reconcile state and application metadata before retrying. [1]

Relations

related
Zoned namespaces (ZNS), Zoned namespace, Zone write pointer, Zone Append

Citations

  1. NVM Express ZNS 1.5, sections 5.7.1 and 5.7.3. Copyright 2008-2026 NVM Express, Inc. ALL RIGHTS RESERVED. (accessed 2026-11-10)
Sources & caveats
  • Semantics are scoped to ZNS revision 1.5, section 5.7; no device support is inferred from a revision label. [1]
  • Specification support is documented; product availability was not assessed.

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Hesela team. Zone Random Write Area. Hesela. 2026-11-10. https://hesela.dev/terms/zone-random-write-area/