Thin Provisioning; Table 19 Maximum Pool Capacity And Required Number Of Drives - Fujitsu ETERNUS AF S3 Series Design Manual

2. Basic Functions
Operations Optimization (Deduplication/Compression and Storage Virtualization)

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 installed 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 relocating and
balancing the physical areas allocated to 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.
Caution
If the Thin Provisioning function is used, the drives must be installed as follows for the maximum pool
capacity. The drive type and capacity are not restricted.
Table 19 Maximum Pool Capacity and Required Number of Drives
Model
ETERNUS AF150 S3
ETERNUS AF250 S3
ETERNUS AF650 S3
*1: Regardless of the maximum pool capacity, the required number of drives is fixed.
Maximum pool Number of
capacity installed drives
— (*1) 2
Up to 1PB 2
1.5PB or more 4
49
Drive installation location
Enclosure Slot location
CE#0 Slot#0 and Slot#1
CE#0 Slot#0 and Slot#1
CE#0 Slot#0 to Slot#3
Design Guide