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Pools

  2 minute read.

Last Modified 2022-08-03 12:28 -0400

TrueNAS uses ZFS data storage pools to efficiently store and protect data.

Storage pools are attached drives organized into virtual devices (vdevs). ZFS and TrueNAS periodically review and heal when discovering a bad block in a pool. Drives are arranged inside vdevs to provide varying amounts of redundancy and performance. Combined, ZFS and vdevs combined create high-performance pools, pools that maximize data lifetime, and all situations in between.

Review Storage Needs

We strongly recommend users review the available system resources and plan the storage use case before creating a storage pool.

  • Allocating more drives to a pool increases redundancy when storing critical information.
  • Maximizing total available storage at the expense of redundancy or performance entails allocating large-volume disks and configuring a pool for minimal redundancy.
  • Maximizing pool performance entails installing and allocating high-speed SSD drives to a pool.

Determining your specific storage requirements is a critical step before creating a pool.

Pool Article Summaries

The articles in this section provide information on setting up system storage, which includes adding, importing or mananging pools, adding or managing datasets and zvols.

Storage Articles

  • Creating Storage Pools

    • This article provides information on creating storage pools and using VDEV layout options in TrueNAS SCALE.

  • Disks

    • This section provides articles with instructions for importing, replacing, wiping disks. Disk Article Summaries Managing Disks This article provides information on managing disks, performing manual S.M.A.R.T. testing and viewing S.M.A.R.T. test results. Importing Disks This article provides instructions for importing a disk and monitoring the import progress. Replacing Disks This article provides disk replacement instructions that includes taking a failed disk offline and and replacing a disk in an existing VDEV.

    • Managing Disks

      • This article provides information on managing disks, performing manual S.M.A.R.T. testing and viewing S.M.A.R.T. test results.

    • Importing Disks

      • This article provides instructions for importing a disk and monitoring the import progress.

    • Replacing Disks

      • This article provides disk replacement instructions that includes taking a failed disk offline and and replacing a disk in an existing VDEV.

    • Wiping a Disk

      • This article provides instructions for wiping a disk.

  • Managing Pools

    • This article provides instructions on managing storage pools, VDEVS and disks in TrueNAS SCALE.

  • Fusion Pools

    • This article provides information on setting up and using fusion pools.

  • SLOG Over-Provisioning

    • This article provides information on the disk_resize command in SCALE.