Figure 24
FTV Configuration
RAID6
FTSP (High tier)
: RAID group
RAID1+0
FTSP (Middle tier)
Chunk
Chunk
FTRP (Parent pool)
FTV
•
Flexible Tier Pool (FTRP)
An FTRP is a management unit for FTSP to be layered. Up to three FTSPs can be registered in one FTRP. This
means that the maximum number of layers is three.
The priority orders can be set per FTSP within one FTRP. Frequently accessed data is stored in an FTSP with a
higher priority. Because FTSPs share resources with TPPs, the maximum number of FTSPs which can be created
is decreased when TPPs are created.
For data encryption, specify encryption for a pool when creating an FTRP or create an FTSP with a Self
Encrypting Drive (SED).
•
Flexible Tier Sub Pool (FTSP)
An FTSP consists of one or more RAID groups. The FTSP capacity is expanded in units of RAID groups. Add RAID
groups with the same specifications (RAID level, drive type, and number of member drives) as those of the
existing RAID groups.
The following table shows the maximum number and the maximum capacity of FTSPs that can be registered
in an ETERNUS AF.
Table 26
The Maximum Number and the Maximum Capacity of FTSPs
Item
ETERNUS AF150 S3
ETERNUS AF250 S3
ETERNUS AF650 S3
Maximum number of Flexible Tier Pools
12
24
64
Maximum number of Flexible Tier Sub Pools (*1)
12
132
256
Maximum capacity of the Flexible Tier Sub Pools
(*2)
4,096TB
6,144TB
24,576TB
Total capacity of the Flexible Tier Volumes (*3)
4,096TB
6,144TB
24,576TB
*1:
The maximum total number of Thin Provisioning Pools and FTSPs.
2. Basic Functions
Operations Optimization (Deduplication/Compression and Storage Virtualization)
57
Design Guide
Summary of Contents for ETERNUS AF S3 Series
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