Volumes; Figure 4.8 Volume Concept; Table 4.3 Raid Configurations That Can Be Registered In A Thin Provisioning Pool Or A Flexible Tier Pool - Fujitsu ETERNUS DX80 S2 Overview

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Chapter 4 System Configuration

4.3 Volumes

Table 4.3
RAID level
RAID0 (*1)
RAID1
RAID1+0
RAID5
RAID6
*1:
Use of RAID0 is not recommended because it is not redundant. For RAID0 configurations, data may be lost due to
the failure of a single drive.
For details about the Thin Provisioning function, refer to
For details about the Flexible Tier function, refer to
(page
78).
An assigned CM is allocated to each RAID group. For details, refer to
4.3
Volumes
This section explains volumes.
Logical drive areas in RAID groups are called volumes.
A volume is the basic RAID unit that can be recognized by the server.

Figure 4.8 Volume concept

A volume may be up to 128TB. However, the maximum capacity of volume varies depending on the OS of the
server.
A volume can be expanded or moved if required. Multiple volumes can be concatenated and treated as a
single volume.
RAID configurations that can be registered in a Thin Provisioning Pool or a Flexible Tier Pool
4(4D)
2(1D+1M)
4(2D+2M), 8(4D+4M), 16(8D+8M), 24(12D+12M)
4(3D+1P), 5(4D+1P), 8(7D+1P), 9(8D+1P), 13(12D+1P)
6(4D+2P), 8(6D+2P), 10(8D+2P)
Volume 1
Volume 2
RAID group 1
ETERNUS DX80 S2/DX90 S2 Disk storage system Overview
Copyright 2013 FUJITSU LIMITED
Number of configuration drives
"6.1.1 Thin Provisioning" (page
"6.1.2 Flexible Tier (Automatic Storage Layering)"
"5.5.4 Assigned CMs" (page
38
77).
72).
Volume 3
RAID group 2
P3AM-4812-11ENZ0

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