It is possible to expand the capacity of the sub-pools which configure a Tier pool.
The items which can be specified in sub-pool capacity expansion are as follows.
Item | Specification | Explanation |
|---|---|---|
Master CM | Optional | This is the specification of the Master CM of a Tier pool. A Master CM can be added only when the Master CM is specified upon creation of the Tier pool. |
Disk Selection | Optional | This is the selection method of the disks that configure the sub-pools. There is automatic selection (Auto) and manual selection (Manual). When the storage device is ETERNUS DX80 S2/DX90 S2, DX400 S2 series, DX8000 S2 series, in order to specify automatic selection (Auto), it is required that the firmware is V10L50 or later. |
Item | Specification | Explanation |
|---|---|---|
FTSP Name | Required | This is the name of the sub-pool of which the capacity is to be expanded. Although the name of the sub-pool subject to operation is displayed by default, it is possible to change the name of the sub-pool. When changing the name, it is necessary to specify a name that will be unique within the storage device. |
Minimum Required Capacity | Required | This is the Minimum Required Capacity (capacity of sub-pool after expansion) as a sub-pool. When automatic selection (Auto) has been specified for Disk Selection of "Basic Configuration Items of Tier Pool", specification of this item is necessary. |
Disk | Required | These are the disks of the RAID group that configure the sub-pool. When manual selection (Manual) has been specified for Disk Selection of "Basic Configuration Items of Tier Pool", specification of this item is necessary. |
Specify a CM | Optional | This is the specification of the Master CM of the RAID group configuring the sub-pool. |
Refer to "Expand Capacity of Sub Pool in Tier Pool" in the ETERNUS SF Web Console Guide for information on how to expand the capacity of a sub-pool.
Note
Expanding the capacity of the sub-pool leads to deviation of data in the sub-pool and brings about variations in access performance. Perform the Flexible Tier Pool Balancing using ETERNUS Web GUI or ETERNUS CLI in order to eliminate data deviation. Refer to the ETERNUS Web GUI Online Help for information on how to perform the Flexible Tier Pool Balancing.
Perform the Flexible Tier Pool Balancing after stopping Automated Storage Tiering in relation to the target Tier pool. When the Flexible Tier Pool Balancing is performed during the operation of Automated Storage Tiering, this may cause cases where Automated Storage Tiering does not operate properly. Refer to "Start/Stop Automated Storage Tiering for Tier Pool" in the ETERNUS SF Web Console Guide for information on how to stop Automated Storage Tiering of a Tier pool.
