Furthermore, because data is reallocated automatically, it can reduce the workload on the administrator for de-
signing storage performance.
Figure 25 Flexible Tier
High speed SAS disk
High speed SSD
Large capacity
and cheap
Nearline SAS disk
Work volume
Low
High
ETERNUS DX
Access frequency
Management server
ETERNUS SF
Storage Cruiser
Monitors the data access frequency
and optimizes performance
The Flexible Tier uses pools configured by multiple RAID groups (Flexible Tier Sub Pools: FTSP) and larger pools
comprised by layers of Flexible Tier Sub Pools (Flexible Tier Pools: FTRP). A volume which is used by the Flexible
Tier is referred to as the Flexible Tier Volume (FTV).
2. Basic Functions
Operations Optimization (Virtualization/Automated Storage Tiering)
50
FUJITSU Storage ETERNUS DX500 S4/DX600 S4, ETERNUS DX500 S3/DX600 S3 Hybrid Storage Systems Design Guide (Basic)
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