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QNAP

QTS 5.0.x

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Taking a Snapshot

  1. Go to Storage & Snapshots > Storage > Storage/Snapshots.
  2. Select a thick volume, thin volume, or block-based LUN.
    Tip:

    To take a snapshot of a file-based LUN, take a snapshot of its parent volume.

  3. Click Snapshot and then select Take a Snapshot.

    The Take a Snapshot window opens.

  4. Optional: Specify a name.
  5. Optional: Choose to keep the snapshot permanently.

    If selected, QTS retains the snapshot indefinitely. If not selected, QTS may delete the snapshot according to the snapshot retention policy set for the volume or LUN.

    For more information, see Configuring a Snapshot Retention Policy.

  6. Select the LUN snapshot type.

    This setting is only available when taking a snapshot of a block-based LUN.

    Type

    Description

    Crash consistent

    The snapshot records the state of the data on the LUN.

    Application consistent

    The snapshot records the state of data and applications on the LUN. The iSCSI host flushes data in memory to the LUN before QTS takes a snapshot. If VMware vCenter is using the LUN, vCenter takes a virtual machine snapshot.

    Important:

    This option is only available for VMware vCenter, or for Volume Shadow Copy Service (VSS) aware applications running on a Windows server. You must install QNAP Snapshot Agent on the iSCSI initiator.
  7. Optional: Specify a description.

    The description helps you to identify the snapshot.

  8. Click OK.

    A confirmation message appears.

  9. Click OK.

QTS takes the snapshot. The snapshot appears in Snapshot Manager.