Multi-Tier Pool

Select the check box, then Enable or Disable when using or not using Dynamic Tiering.

A pool that consists of the external volumes to which the cache mode is set to Disable cannot be changed from Disable to Enable.

In Thin Image, you cannot change the setting of this function.

Options for Multi-Tier Pool

Specifies the performance monitoring, tier relocation, edit buffer space for new page assignment, and buffer space for tier relocation if Multi-Tier Pool is set to Enable.

In Thin Image, you cannot change the setting of this function.

Select the Tier Management check box, then set the tier management, the cycle time, and the monitoring period.

• Tier Management: Select Auto or Manual.

• Cycle Time: When selecting Auto in the Tier Management option, select the cycle of performance monitoring and tier relocation from the Cycle Time list.

• Monitoring Period: When selecting 24 Hours in the Cycle Time list, specify the time of starting and ending of performance monitoring in 00:00 to 23:59 (default value). Take one or more hours between the starting time and the ending time. If you specify the starting time later than the ending time, the performance monitoring continues until the time when you specify as the ending time on the next day.

Select the Monitoring Mode check box, then set the monitoring mode.

Monitoring Mode: Specify the monitoring mode. If you perform the tier relocation weighted to the past period monitoring result, select Continuous Mode. If you perform the tier relocation on the specified cycle, select Period Mode.

Select the Relocation Speed check box. Then set the tier relocation speed.

Relocation Speed: Specify the page relocation speed when tier relocation is performed. You can set the speed to: 1(Slowest), 2(Slower), 3(Standard), 4(Faster), or 5(Fastest).

Select the Buffer Space for New page assignment check box, then set the buffer space for new page assignment.

Buffer Space for New page assignment: Enter an integer value from 0 to 50 as the percentage (%) to set for tier 1, tier 2, and tier 3. If there is no tier, you cannot set this item.

Select the Buffer Space for Tier relocation check box, then set the buffer space for tier relocation.

Buffer Space for Tier relocation: Enter an integer value from 2 to 40 as the percentage (%) to set for tier 1, tier 2, and tier 3.

If the check box is not selected, you cannot set this item. You must set all items if you change the pool setting from Dynamic Provisioning to Dynamic Tiering.

If the check box is selected, you cannot collapse the Options for Multi-Tier Pool field.

Subscription Limit

Select the Subscription Limit check box, then enter the subscription limit (%). In Thin Image, you cannot change the setting of this function.

• If this field is blank, the subscription is set to be unlimited.

• Use blank or a value in the following range:

(Total V-VOL capacity including the control information / pool capacity) * 100(%) +1 to 65534(%)

• When the current subscription setting is unlimited and the value calculated by the following formula exceeds 65534, you cannot configure the subscription limit.

((Total V-VOL capacity including the control information / pool capacity) * 100)

• If the check box is not selected, the subscription limit is disabled.

Pool Name

Select the Pool Name check box, then enter the pool name.

• Prefix: Enter the alphanumeric characters, which are fixed characters of the head of the pool name. The characters are case-sensitive.

• Initial Number: Enter the initial number following the prefix name, which can be entered up to 9 digits.*

• You can enter up to the 32 characters including the initial number. The initial number must be 9 or less digits.

*When a pool is selected, the pool name appears in the Prefix text box by default. When multiple pools are selected, the initial number from the set number to the maximum number of the digit number is automatically set.

Example:

• When 1 is set in the Initial Number field, number 1 to 9 is automatically given to the pool name.

• When 08 is set in the Initial Number field, number 08 to 99 is automatically given to the pool name.

• When 098 is set in the Initial Number field, number 098 to 999 is automatically given to the pool name.

Warning Threshold

Select the Warning Threshold check box, then enter a threshold. The minimum threshold is the pool usage rate plus 1%. The maximum threshold is 100%.

For Thin Image, you cannot change the setting of this function:

Check Warning Threshold and enter a threshold.

You cannot set this item if the result of the following calculation exceeds 95:

(used-pool-capacity/pool-capacity) * 100 (%)

Depletion Threshold

Select the Depletion Threshold check box, then enter a threshold. The minimum threshold is the pool usage rate plus 1%. The maximum threshold is 100%.

If you change the Thin Image pool, you cannot set this item.