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  1. TrueNAS SCALE 23.10
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  3. SCALE Tutorials
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  5. Storage
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  7. Pools
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TrueNAS SCALETrueNAS SCALE Version Documentation
This content follows the TrueNAS SCALE 23.10 (Cobia) releases. Use the Product and Version selectors above to view content specific to different TrueNAS software or major version.

Pools

  2 minute read.

Last Modified 2024-03-19 08:38 EDT

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.

For more on ZFS storage, see ZFS Primer.

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.

Contents

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

  • Pool Creation Wizard: Background considerations and a simple tutorial on creating storage pools in TrueNAS SCALE.

    • Disks: Articles with instructions for managing, replacing, and wiping disks.

      • Managing Disks: Provides information on managing disks, performing manual S.M.A.R.T. testing and viewing S.M.A.R.T. test results.

      • Replacing Disks: Provides disk replacement instructions that includes taking a failed disk offline and replacing a disk in an existing VDEV. It automatically triggers a pool resilver during the replacement process.

      • Wiping a Disk: Provides instructions for wiping a disk.

    • Managing Pools: Provides instructions on managing storage pools, VDEVS, and disks in TrueNAS SCALE.

      • Importing a Pool: Provides information on ZFS importing for storage pools in TrueNAS SCALE. It also addresses GELI-encrypted pools.

        • Fusion Pools: Provides information on setting up and using fusion pools.

          • SLOG Over-Provisioning: Provides information on the disk_resize command in TrueNAS SCALE.