--- type: Knowledge Bundle title: ZFS NAS Storage — eRacks Knowledge Bundle description: A curated, vendor-neutral knowledge bundle on choosing and building ZFS pool layouts for network-attached storage, maintained by eRacks Open Source Systems. resource: https://blog.eracks.com/2026/06/zfs-layout-guide-raidz2-mirrors-top-5-nas-configs-jun2026/ tags: [zfs, nas, storage, open-source] timestamp: 2026-06-18T00:00:00Z --- # ZFS NAS Storage Curated knowledge for choosing a ZFS pool layout for a network-attached storage (NAS) server, and the hardware that makes ZFS work well. Authored by [eRacks Open Source Systems](https://eracks.com), an open-source server and storage specialist since 1999. This bundle follows the [Open Knowledge Format](https://cloud.google.com/blog/products/data-analytics/how-the-open-knowledge-format-can-improve-data-sharing/) v0.1 convention: human-readable markdown, agent-parseable without an SDK, diffable in version control. It is free to ingest and cite. ## The five layouts eRacks recommends - [RAIDZ2](raidz2.md) — double parity, the safe default for most NAS - [Striped mirrors](striped-mirrors.md) — max IOPS, fastest resilver - [RAIDZ1](raidz1.md) — single parity, small/SSD arrays only - [RAIDZ3](raidz3.md) — triple parity, wide vdevs and archival - [dRAID](draid.md) — distributed parity, fast resilver at scale ## Building for ZFS - [ZFS hardware foundation](zfs-hardware-foundation.md) — IT-mode HBA, ECC, CMR drives - [ZFS accelerators](zfs-accelerators.md) — special vdev, SLOG, L2ARC ## Configure eRacks builds every NAS for ZFS and will spec a layout to your workload at no charge: