Create Auto-Tier LUN: Define Data Protection

You can allocate clone capacity for an auto‑tier LUN and create a schedule to perform clone operations on a regular basis. The Data Protection page also allows you to either use custom QoS settings for your clones or use the LUN settings.

1. Navigate to SAN > Storage > LUNs.
2. Select Actions > Create.
3. Click Auto Tier.
4. Click the Data Protection tab.
5. To allow the system to create Clone LUNs, select the Enable Clones check box.
   Result:Selecting this option enables the remaining options on the page.
6. In the Maximum Capacity field, enter a value for the Capacity for Clone Storage. The system sets a default of 110% of the LUN storage capacity. Selecting a value of 100% provides enough capacity to avoid strict control over the storage capacity without using up unnecessary capacity.
   Caution

   Allocate sufficient repository or clone storage capacity to minimize the chances of running out of this space (which could lead to data inconsistency or loss). To set sufficient capacity, use a value equal to the source volume capacity multiplied by the number of replicas multiplied by the maximum rate of change. For example, for a 100 GB volume that is projected to have 20 active replicas at a time and no more than a 20% rate of change, use a value of 400 GB for the storage capacity.
7. (Optional) Select the Match Repository QoS to LUN QoS check box.
   Result:Selecting the Match Repository QoS to LUN QoS option applies the LUN QoS properties to the clones and disables the Clone Storage QoS fields.
8. (Optional) From the Storage Domain list, select the Storage Domain that you want to assign the LUN.
9. Select the Initial Storage Class where you want to store the LUN.
   Possible classes:

   • Capacity Disk

   • Capacity SSD

   • Performance Disk

   • Performance SSD

10. (Optional) Select the Basic link.
    Result:
    The indirect QoS properties display. Available selections:

    • Initial Typical Access

    • Initial I⁠/O Bias

    • Initial Redundancy

11. (Optional) From the Initial Typical Access list, select the common access method for this LUN.
    Available access methods:

    • Sequential

    • Random

    • Mixed

12. (Optional) From the Initial I⁠/O Bias list, select the typical read‑write ratio for this LUN.
    Available biases:

    • Read

    • Write

    • Mixed

13. (Optional) Select the Advanced link.
    Result:
    The direct QoS properties display. Available selections:

    • Initial RAID Level

    Important! Selecting Advanced QoS properties clears the Basic QoS selections.
14. (Optional) From the Initial RAID Level list, select the RAID level to associate with this LUN.
    Possible RAID levels:

    • Single Parity

    • Double Parity

    • Mirrored

15. (Optional) From the Priority Level field, select the desired option for the LUN.
    Valid choices:

    • Premium

    • High

    • Medium

    • Low

    • Archive

16. (Optional) Click the Additional Options button.
    Result:The Additional Options dialog appears.
17. (Optional) From the Additional Options dialog, select the desired Storage Classes that you want the auto‑tier LUN to use.
18. Click Close.
19. (Optional) To create a Clone LUN data protection schedule, click Create.
    See the procedure for creating Clone LUNs on a scheduled basis.
20. (Optional) Click OK.