Operations Optimization (Virtualization/Automated Storage Tiering); Thin Provisioning - Fujitsu ETERNUS DX100 S4 Design Manual

2. Basic Functions

Operations Optimization (Virtualization/Automated Storage Tiering)

Operations Optimization (Virtualization/Automated Stor-
age Tiering)
A single controller configuration differs from a dual controller configuration in the following
ways:
The Thin Provisioning function cannot be used.
•
• The Flexible Tier function cannot be used.

Thin Provisioning

The Thin Provisioning function has the following features:
Storage Capacity Virtualization
•
The physical storage capacity can be reduced by allocating the virtual drives to a server, which
allows efficient use of the storage capacity. The volumes more than the capacity of all the instal-
led drives can be allocated by setting the capacity required for virtual volumes in the future.
• TPV Balancing
I/O access to the virtual volume can be distributed among the RAID groups in a pool, by relocat-
ing and balancing the physical allocation status of the virtual volume.
• TPV/FTV Capacity Optimization (Zero Reclamation)
Data in physically allocated areas are checked in blocks and unnecessary areas (areas where 0 is
allocated to all of the data in each block) are released to unallocated areas.
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems Design Guide (Basic)
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