Create Auto-Tiered LUN: Define Quality of Service

Define the Quality of Service (QoS) attributes to allocate the storage resources that are necessary to create the auto‑tiered LUN.

1. Navigate to SAN > Storage > LUNs.
2. Select Actions > Create.
3. Click Auto Tier.
4. (Optional) From the Storage Domain list, select the Storage Domain that you want to assign to the LUN.
   If necessary, click the browse button, […] to display a list of available Storage Domains.

   Note: The Storage Domain list displays only when administrator-defined Storage Domains exist. If no administrator-defined Storage Domains exist or you do not assign the LUN to a specific Storage Domain, then the system assigns the LUN to the default Storage Domain.
5. Enter a name in the LUN Name field.
6. (Optional) From the Volume Group list, select the volume group that you want the LUN to belong.
   Note: If necessary, click the browse button, […] to create a volume group.
7. To use the QoS properties of an existing Storage Profile, select the Use Storage Profile field, and then select the desired profile from the list.

   Selecting a Storage Profile sets the remaining QoS property fields to read‑only and displays the Advanced QoS settings that are associated with the Storage Profile.

8. Select the Initial Storage Class where you want to store the LUN.
   Possible classes:

   • Capacity Disk

   • Capacity SSD

   • Performance Disk

   • Performance SSD

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

   • Initial Typical Access

   • Initial I⁠/O Bias

   • Initial Redundancy

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

    • Sequential

    • Random

    • Mixed

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

    • Read

    • Write

    • Mixed

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

    • Initial RAID Level

    • Initial Read Ahead

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

    • Single Parity

    • Double Parity

    • Mirrored

14. (Optional) From the Initial Read Ahead list, select the read‑ahead polity to apply to this LUN.
    Valid policies:

    • Normal

    • Aggressive

    • Conservative

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

    • Premium

    • High

    • Medium

    • Low

    • Archive

16. (Optional) From the Migration⁠/Copy Priority list, select the priority to define how the system performs background copies.
    Valid choices:

    • System Chooses

    • Minimize Impact

    • Maximize Speed

17. (Optional) Click the Additional Options button.
    The Additional Options dialog appears.
18. (Optional) From the Additional Options dialog, select the desired Storage Classes that you want the auto‑tier LUN to use.
19. (Optional) To enable auto‑tiering, select the Tier Reallocation Enabled check box.
20. Click Close.
21. In the Allocated and Addressable fields, specify the logical capacities for this volume.
    Note: Use the storage capacity usage graphs to determine the impact on the storage requirements for the LUN.
22. To create the LUN now, click OK.