Table 13 Chunk Size According To The Configured Tpp Capacity; Table 14 Levels And Configurations For A Raid Group That Can Be Registered In A Tpp - Fujitsu ETERNUS DX100 S4 Design Manual

2. Basic Functions
Operations Optimization (Virtualization/Automated Storage Tiering)
The following table shows the TPP chunk size that is applied when TPPs are created.

Table 13 Chunk Size According to the Configured TPP Capacity

Setting value of the maximum pool capacity
Up to 256TB
Up to 512TB
Up to 1,024TB
Up to 2,048TB
*1: Chunk size is for delimiting data. The chunk size is automatically set according to the maxi-
mum pool capacity.
To perform encryption, specify encryption by firmware when creating a TPP, or select the Self
Encrypting Drive (SED) for configuration when creating a TPP.
The following table shows the RAID configurations that can be registered in a TPP.

Table 14 Levels and Configurations for a RAID Group That Can Be Registered in a TPP

RAID level
RAID0
RAID1
RAID1+0
RAID5
RAID6
RAID6-FR
Thin Provisioning Volume (TPV)
•
The maximum capacity of a TPV is 128TB. Note that the total TPV capacity must be smaller than
the maximum capacity of the TPP.
When creating a TPV, the Allocation method can be selected.
- Thin
When data is written from the host to a TPV, a physical area is allocated to the created virtual
volume. The capacity size (chunk size) that is applied is the same value as the chunk size of the
TPP where the TPV is created. The physical storage capacity can be reduced by allocating a vir-
tualized storage capacity.
- Thick
When creating a volume, the physical area is allocated to the entire volume area. This can be
used for volumes 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 a TPV
is created.
Perform a TPV/FTV capacity optimization if "Thick" has changed to "Thin". By optimizing the ca-
pacity, the area that was allocated to a TPV is released and the TPV becomes usable. If a TPV/FTV
capacity optimization is not performed, the usage of the TPV does not change even after the Al-
location method is changed.
The capacity of a TPV can be expanded after it is created.
For details on the number of TPVs that can be created, refer to
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems Design Guide (Basic)
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)
Copyright 2023 Fujitsu Limited
Chunk size (*1)
21MB
42MB
84MB
168MB
"Volume" (page
43
Recommended con-
figurations
—
2 (1D+1M)
8 (4D+4M)
4 (3D+1P), 8 (7D+1P)
8 (6D+2P)
17 ((6D+2P) ´2+1HS)
26).
P3AM-7642-32ENZ0