Raid Group; Table 6 Raid Group Types And Usage - Fujitsu ETERNUS DX100 S4 Design Manual

2. Basic Functions
RAID Functions

RAID Group

This section explains RAID groups.
A RAID group is a group of drives. It is a unit that configures RAID. Multiple RAID groups with the
same RAID level or multiple RAID groups with different RAID levels can be set together in the
ETERNUS DX. After a RAID group is created, RAID levels can be changed and drives can be added.

Table 6 RAID Group Types and Usage

Type
RAID group
REC Disk Buffer Areas that are dedicated for the REC Consistency
Thin Provision-
ing Pool (TPP)
(*5)
Flexible Tier
Sub Pool (FTSP)
(*6)
*1 : This value is for a 15.36TB SSD RAID6-FR ([13D+2P]´2+1HS) configuration in the ETERNUS
DX100 S3/DX200 S3.
For details on the number of configuration drives for each RAID level and recommended con-
figurations, refer to
*2: This value is for a 30.72TB SSD RAID6-FR ([13D+2P]´2+1HS) configuration in the ETERNUS
DX100 S4/DX200 S4.
For details on the number of configuration drives for each RAID level and recommended con-
figurations, refer to
*3: This value is for a 15.36TB SSD RAID1+0 (4D+4M) configuration in the ETERNUS DX100 S3/
DX200 S3.
*4: This value is for a 30.72TB SSD RAID1+0 (4D+4M) configuration in the ETERNUS DX100 S4/
DX200 S4.
*5: For details on the number of configuration drives for each RAID level and recommended con-
figurations, refer to
*6: For details on the number of configuration drives for each RAID level and recommended con-
figurations, refer to
*7 : Total of the Thin Provisioning Pool capacity and the FTSP capacity.
*8: The maximum capacity of an ETERNUS DX100 S3/DX200 S3 with one controller is 55TB.
*9: The maximum capacity of an ETERNUS DX100 S4/DX200 S4 with one controller is 109TB.
Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems Design Guide (Basic)
Usage
Areas to store normal data. Volumes (Standard,
WSV, SDV, SDPV) for work and Advanced Copy
can be created in a RAID group.
mode to temporarily back up copy data.
RAID groups that are used for Thin Provisioning in
which the areas are managed as a Thin Provision-
ing Pool (TPP). Thin Provisioning Volumes (TPVs)
can be created in a TPP.
RAID groups that are used for the Flexible Tier
function in which the areas are managed as a Flex-
ible Tier Sub Pool (FTSP). Larger pools (Flexible
Tier Pools: FTRPs) are comprised by layers of
FTSPs. Flexible Tier Volumes (FTVs) can be cre-
ated in an FTSP.
Table 7.
Table 7.
Table 14.
Table 19.
Copyright 2023 Fujitsu Limited
Maximum capacity
Per RAID group
Approximately 363TB
(*1)
Approximately 711TB
(*2)
Approximately 55TB
(*3)
Approximately 109TB
(*4)
2,048TB (*7)
24
Per storage system
Depends on the
number of installable
drives
110TB (*3) (*8)
218TB (*4) (*9)
P3AM-7642-32ENZ0