When the deletion of RAID groups causes a sub-pool in which the RAID groups exist to be deleted, the configuration of the Tier pool and FTV is changed because the tier configuration of a Tier pool containing the sub-pool is changed.
When continuing to run Automated Storage Tiering, reconfigure the Tiering policy of the Tier pool and reconfigure the changes in the content to re-implement Automated Storage Tiering if necessary.
The changes in the content are as follows.
Automated Storage Tiering Status shows "Stop".
The association between the Tier pool and the Tiering policy is canceled.
The FTSP number (level) of the sub-pool that belongs to the Tier pool is reconfigured.
If the tier configuration of the Tier pool has changed from three tiers to two tiers
If Low sub-pool or High sub-pool is deleted
Middle sub-pool is automatically set to the deleted sub-pool level. (For example, if Low sub-pool is deleted, Middle sub-pool is automatically set to Low sub-pool.)
After that, Middle sub-pool is deleted from the configuration information of the Tier pool.
If Middle sub-pool is deleted
Middle sub-pool is deleted from the configuration information of the Tier pool.
If the Tier pool configuration has changed from two tiers to one tier
The tier level of the sub-pool is deleted and changed to a Tier pool configuration with one tier.
The Priority FTSP of the FTV that belongs to the Tier pool is reconfigured.
If the deleted sub-pool is set for the priority FTSP of the FTV, the FTSP is set to "Auto".
The capacity quota share of FTV that belongs to the Tier pool is reconfigured.
If the Tier pool configuration has changed from three tiers to two tiers
If Middle quota share is set for FTV that belongs to the Tier pool, the FTV capacity quota share is cleared.
If the Tier pool configuration has changed from two tiers to one tier
The capacity quota share that is set for FTV that belongs to the Tier pool is all cleared.
Point
The status of the RAID group and the status of the RAID reduction for the Tier pool can be checked in the Web Console. Refer to "4.3 Confirmation of Configuration Details of Tier Pool" for details.
