Edit Pools window

Multi-Tier Pool

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

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

For a Dynamic Provisioning pool that contains Thin Image pairs and snapshot data, you cannot change this setting from Disable to Enable.

Select the check box if you are using active flash. If pool volumes whose drive type is SSD are installed, this check box can be selected.

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, and 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, and 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, and 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, and 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 Tieringor active flash.

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

Data Direct Mapping

Select the check box, and then select Enable or Disable for the data direct mapping attribute. This item can be enabled only when the pool type is Dynamic Provisioning and multi-tier pool is disabled.

Enable or Disable cannot be selected in the following cases:

• You cannot select Enable or Disable if any of the following conditions is satisfied:
  • Multi-Tier Pool is enabled.
  • A Thin Image pool is selected.
• You cannot select Enable when the selected pool contains a DP-VOL associated with an LDEV that does not have the data direct mapping attribute.
• You cannot select Enable when the selected Dynamic Provisioning pool contains Thin Image pairs and snapshot data.
• You cannot select Disable when the selected pool contains an LDEV with the data direct mapping attribute.

Subscription Limit

Select the Subscription Limit check box, and 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, and 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, up to 9 digits.*
• You can enter up to 32 characters including the initial number. The initial number must be 9 digits or fewer.

* 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 digits 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 check box, and then enter a threshold. The minimum threshold is the sum of the mapped capacity rates, reserved capacity rates, and one percent (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 check box, and then enter a threshold. The minimum threshold is the sum of the mapped capacity rates, reserved capacity rates, and one percent (1%). The maximum threshold is 100%.

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

Protect V-VOLs when I/O fails to Blocked Pool VOL

Select the check box, and then select Yes or No in the protect function for DP-VOL. If this function is enabled, when the pool-VOL is blocked, DP-VOL is protected from reading and writing requests. And at the same instant, the access attribute of the DP-VOL is changed to the Protect attribute.

However, if Data Retention Utility is not installed, this check box goes inactive.

Suspend TI pairs when depletion threshold is exceeded

For a Dynamic Provisioning pool that contains Thin Image pairs and snapshot data, specify whether SIM code 62Exxx is output when the pool used capacity exceeds the depletion threshold. If you attempt to split a Thin Image pair in the pool after SIM code 62Exxx is output, the operation fails and the pair is suspended by error.

• Yes: When the pool used capacity exceeds the depletion threshold, SIM code 62Exxx is output, and Thin Image pairs in the pool cannot be split.

  If Multi-Tier Pool or Data Direct Mapping is enabled for the pool, Yes cannot be selected.

• No: When the pool used capacity exceeds the depletion threshold, SIM code 62Exxx is not output, and Thin Image pairs in the pool can be split.

Protect V-VOLs when I/O fails to Full Pool

Select the check box, and then select Yes or No in the protect function for DP-VOL. If this function is enabled, when the pool usage reaches the full size, DP-VOL is protected from reading and writing requests. And at the same instant, the access attribute of the DP-VOL is changed to the Protect attribute.

However, if Data Retention Utility is not installed, this check box goes inactive.

Assign Deduplication System Data Volume

(Open systems)

Select Yes or No to enable or disable the deduplication setting. Deduplication cannot be enabled if any of the following conditions exists:

• The license for the capacity saving function is not installed.
• Data Direct Mapping is enabled.
• Multi-Tier Pool is enabled.
• There are not enough available LDEV IDs.
• There are not enough available cache management devices.

Deduplication cannot be disabled if the setting for Deduplication is being disabled.