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QTS 5.0.x

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Creating a Qtier Storage Pool

For details on hardware and software requirements, see Qtier Requirements.

Tip:

Immediately after creating a Qtier storage pool, QTS starts moving data between tiers. This data migration may affect system storage performance. You should create the Qtier storage pool during a period of low NAS activity.

  1. Go to Storage & Snapshots > Storage > Storage/Snapshots.
  2. Perform one of the following actions.

    Current NAS State

    Action

    No volumes or storage pools

    Click New Storage Pool

    One or more volumes or storage pools

    Select Create > New Storage Pool

    The Create Storage Pool Wizard opens.

  3. Select Enable Qtier (auto-tiering storage).
  4. Click Next.
  5. Create the ultra-high speed tier.
    1. Click .
    2. Optional: Select an expansion unit.
      Important:

      If you create the ultra-high speed tier using disks installed in a TL-series expansion unit, then the two tiers (high speed, capacity) must consist of disks from the same expansion unit.

    3. Select one or more solid-state drives (SSDs).
    4. Select a RAID type.

      For details, see RAID Types.

    5. Optional: Select the disk that will be used as a hot spare for the ultra-high speed tier.
  6. Optional: Create the high speed tier.

    At least two different tiers are required in a Qtier storage pool.

    1. Click .
    2. Optional: Select an expansion unit.
    3. Select one or more SAS hard disk drives (HDDs).
    4. Select a RAID type.

      For details, see RAID Types.

    5. Optional: Select the disk that will be used as a hot spare for the high speed tier.
  7. Optional: Create the capacity tier.

    At least two different tiers are required in a Qtier storage pool.

    1. Click .
    2. Optional: Select an expansion unit.
    3. Select one or more SATA or NL-SAS HDDs.
    4. Select a RAID type.

      For details, see RAID Types.

    5. Optional: Select the disk that will be used as a hot spare for the capacity tier.
  8. Click Next.
  9. Optional: Configure SSD over-provisioning.

    Over-provisioning reserves a percentage of SSD storage space on each disk in the RAID group to improve write performance and extend the disk's lifespan. You can decrease the amount of space reserved for over-provisioning after QTS has created the RAID group.

    Tip:

    To determine the optimal amount of over-provisioning for your SSDs, download and run SSD Profiling Tool from App Center.

  10. Optional: Configure the alert threshold.

    QTS issues a warning notification when the percentage of used pool space is equal to or above the specified threshold.

  11. Optional: Configure pool guaranteed snapshot space.

    Pool guaranteed snapshot space is storage pool space that is reserved for storing snapshots. Enabling this feature ensures that QTS always has sufficient space to store new snapshots.

  12. Click Next.
  13. Verify the storage pool information.
  14. Click Create.

    A confirmation message appears.

    Warning:

    All data on the selected disks will be deleted.

  15. Click OK.

QTS creates the Qtier storage pool and starts moving data between tiers. QTS starts automatically tiering data after it has spent sufficient time analyzing data access patterns.