Table 21 Levels And Configurations For A Raid Group That Can Be Registered In A Ftsp - Fujitsu ETERNUS AF250 Design Manual

1. Function
Operations Optimization (Deduplication/Compression and Storage Virtualization)
*1: The maximum total number of Thin Provisioning Pools and FTSPs.
*2: The maximum pool capacity is the capacity that combines the FTSP capacity and the Thin Provisioning
Pool capacity in the ETERNUS AF. The maximum pool capacity of an FTRP is the same as the maximum
pool capacity of a Flexible Tier Sub Pool.
*3: Same as the maximum capacity of a Flexible Tier Sub Pool. The actual maximum capacity varies depend-
ing on the physical capacity that is configurable in the ETERNUS AF.
The RAID levels and the configurations, which can be registered in the FTSP, are the same as those of a TPP.
The following table shows the RAID configurations that can be registered in an FTSP.

Table 21 Levels and Configurations for a RAID Group That Can Be Registered in a FTSP

RAID level
RAID0
RAID1
RAID1+0
RAID5
RAID6
RAID6-FR
• Flexible Tier Volume (FTV)
An FTV is a management unit of volumes to be layered. The maximum capacity of an FTV is 128TB. Note that
the total capacity of FTVs must be less than the maximum capacity of FTSPs.
When creating an FTV, the Allocation method can be selected.
Thin
-
When data is written from the host to an FTV, the physical area is allocated to a created virtual volume. The
physical storage capacity can be reduced by allocating a virtualized storage capacity.
Thick
-
When creating a volume, the physical area is allocated to the entire volume area. This can be used for vol-
umes in the system area to prevent a system stoppage due to a pool capacity shortage during operations.
In general, selecting "Thin" is recommended. The Allocation method can be changed after an FTV is created.
Perform a TPV/FTV capacity optimization if "Thick" has changed to "Thin". By optimizing the capacity, the area
that was allocated to an FTV is released and the FTV becomes usable. If a TPV/FTV capacity optimization is not
performed, the usage of the FTV does not change even after the Allocation method is changed.
The capacity of an FTV can be expanded after it is created.
For details on the number of FTVs that can be created, refer to
●
Threshold Monitoring of Used Capacity
When the used capacity of an FTRP or an FTV reaches the threshold, an alarm notification can be sent from ETER-
NUS SF Storage Cruiser. There are two types of thresholds: "Attention" and "Warning". A different value can be
specified for each threshold type.
Make sure to add drives before free space in the FTRP runs out, and add FTSP capacity from ETERNUS SF Storage
Cruiser.
Number of configurable drives
4 (4D)
2 (1D+1M)
4 (2D+2M), 8 (4D+4M), 16 (8D+8M), 24 (12D+12M)
4 (3D+1P), 5 (4D+1P), 7 (6D+1P), 8 (7D+1P), 9 (8D+1P), 13 (12D+1P)
6 (4D+2P), 8 (6D+2P), 9 (7D+2P), 10 (8D+2P)
13 ((4D+2P) ´2+1HS), 17 ((6D+2P) ´2+1HS),
31 ((8D+2P) ´3+1HS), 31 ((4D+2P) ´5+1HS)
FUJITSU Storage ETERNUS AF250 S2, ETERNUS AF250 All-Flash Arrays Design Guide (Basic)
Copyright 2019 FUJITSU LIMITED
"Volume" (page
54
Recommended config-
urations
-
-
8 (4D+4M)
5 (4D+1P), 8 (7D+1P)
8 (6D+2P)
17 ((6D+2P) ´2+1HS)
25).
P3AG-1822-09ENZ0