The "Automated Storage Tiering (AST)" function permits the high-power use of storage pools offering different performances within the storage system.
Data is automatically migrated to storage pools based on different drive technologies with different access times, sizes and costs according to its access frequency.
Access frequency | Storage medium |
High-tier class | High-performance disks |
Mid-tier class | Mid-tier class disks |
Low-tier class | Favorably priced large disks |
Automated Storage Tiering is based on the "thin provisioning" functionality of the ETERNUS DX/AF storage systems. The ETERNUS SF management software is required for configuration and administration.
Automated Storage Tiering requires a set of storage disks offering different performance and size, which are configured in the flexible tier pool with its flexible tier subpools. The Automated Storage Tiering storage disks are also called flexible tier volumes.
Data migration is controlled by definable migration rules, which are known as tiering policies.
Commands for Automated Storage Tiering
Command | Function |
Displays the configuration of the flex pools | |
Displays the device information of the flex volumes |