Fujitsu ETERNUS DX100 S3 - Figure 6 RAID6 Concept

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● RAID6 (Striping with Double Distributed Parity)

Allocating two different parities on different drives (double parity) makes it possible to recover

from up to two drive failures.

Figure 6 RAID6 Concept

P2 M, N, O, P

P2 I, J, K, L

A B C D

Data writing request

P1 M, N, O, P

P1 I, J, K, L

P1 E, F, G, H P2

E, F, G, H

A, B, C, D

A B DC

Create parity data

Drive#0 Drive#1 Drive#2 Drive#3 Drive#4 Drive#5

Parity for data A to D: P1 A, B, C, D and P2 A, B, C, D

Parity for data E to H: P1 E, F, G, H and P2 E, F, G, H

Parity for data I to L: P1 I, J, K, L and P2 I, J, K, L

Parity for data M to P: P1 M, N, O, P and P2 M, N, O, P

2. Basic Functions

RAID Functions

Fujitsu Storage ETERNUS DX100 S4/DX200 S4, ETERNUS DX100 S3/DX200 S3 Hybrid Storage Systems

Design Guide (Basic)

P3AM-7642-32ENZ0

Main Page

Table of Contents2
Function Overview14
Basic Functions14
Table 1 Basic Functions14
Table 2 SAN Functions15
RAID Functions16
Supported RAID16
Figure 1 RAID0 Concept17
Figure 2 RAID1 Concept17
Figure 3 RAID1+0 Concept18
Figure 4 RAID5 Concept18
Figure 5 RAID5+0 Concept19
Figure 6 RAID6 Concept20
Figure 7 RAID6-FR Concept21
Table 3 RAID Level Comparison21
User Capacity (Logical Capacity)22
Table 4 Formula for Calculating User Capacity for each RAID Level22
Table 5 User Capacity Per Drive23
RAID Group24
Table 6 RAID Group Types and Usage24
Figure 8 Example of a RAID Group25
Table 7 Number of Drives to Configure and the Recommended Number of Drives Per RAID Group25
Volume26
Figure 9 Volume Concept26
Table 8 Number of Volumes that Can be Created27
Table 9 Volumes that Can be Created27
Hot Spares29
Figure 10 Hot Spares29
Table 10 Hot Spare Installation Conditions29
Table 11 Hot Spare Selection Criteria30
Data Protection31
Data Block Guard31
Figure 11 Data Block Guard31
Disk Drive Patrol32
Figure 12 Disk Drive Patrol32
Redundant Copy33
Figure 13 Redundant Copy Function33
Rebuild34
Figure 14 Rebuild34
Fast Recovery35
Figure 15 Fast Recovery35
Copyback/Copybackless36
Figure 16 Copyback36
Figure 17 Copybackless37
Protection (Shield)38
Figure 18 Protection (Shield)38
Reverse Cabling40
Figure 19 Reverse Cabling40
Operations Optimization (Virtualization/Automated Storage Tiering)41
Thin Provisioning41
Figure 20 Storage Capacity Virtualization42
Table 12 TPP Maximum Number and Capacity42
Table 13 Chunk Size According to the Configured TPP Capacity43
Table 14 Levels and Configurations for a RAID Group that Can be Registered in a TPP43
Table 15 TPP Thresholds44
Table 16 TPV Thresholds44
Figure 21 TPV Balancing (When Allocating Disproportionate TPV Physical Capacity Evenly)45
Figure 22 TPV Balancing (When Distributing Host Accesses Evenly after TPP Expansion)45
Figure 23 TPV/FTV Capacity Optimization47
Flexible Tier48
Figure 24 Flexible Tier49
Table 17 Chunk Size and Data Transfer Unit49
Figure 25 FTV Configuration50
Table 18 the Maximum Number and the Maximum Capacity of Ftsps51
Table 19 Levels and Configurations for a RAID Group that Can be Registered in a FTSP51
Table 20 FTRP Thresholds52
Table 21 FTV Thresholds52
Figure 26 FTRP Balancing53
Extreme Cache Pool54
Figure 27 Extreme Cache Pool54
Optimization of Volume Configurations55
Table 22 Optimization of Volume Configurations55
RAID Migration57
Figure 28 RAID Migration (When Data Is Migrated to a High Capacity Drive)57
Figure 29 RAID Migration (When a Volume Is Moved to a Different RAID Level)57
Figure 30 RAID Migration58
Logical Device Expansion59
Figure 31 Logical Device Expansion (When Expanding the RAID Group Capacity)59
Figure 32 Logical Device Expansion (When Changing the RAID Level)59
LUN Concatenation61
Figure 33 LUN Concatenation61
Figure 34 LUN Concatenation (Volume Concatenation)62
Wide Striping63
Figure 35 Wide Striping63
Data Encryption64
Encryption with Self Encrypting Drive (SED)65
Figure 36 Data Encryption with Self Encrypting Drives (SED)65
Firmware Data Encryption66
Figure 37 Firmware Data Encryption66
Key Management Server Linkage67
Figure 38 Key Management Server Linkage68
Table 23 Functional Comparison between the SED Authentication Key (Common Key) and Key Man- Agement Server Linkage68
User Access Management70
Account Management70
Figure 39 Account Management70
Table 24 Available Functions for Default Roles71
User Authentication72
Table 25 Client Public Key (SSH Authentication)72
Audit Log74
Figure 40 Audit Log74
Environmental Burden Reduction75
Eco-Mode75
Figure 41 Eco-Mode75
Table 26 Eco-Mode Specifications76
Power Consumption Visualization78
Figure 42 Power Consumption Visualization78
Operation Management/Device Monitoring79
Operation Management Interface79
Performance Information Management80
Event Notification82
Figure 43 Event Notification82
Table 27 Levels and Contents of Events that Are Notified82
Table 28 SNMP Specifications83
Device Time Synchronization85
Figure 44 Device Time Synchronization85
Power Control86
Power Synchronized Unit86
Figure 45 Power Synchronized Unit86
Remote Power Operation (Wake on LAN)87
Figure 46 Wake on LAN87
Backup (Advanced Copy)88
Figure 47 Example of Advanced Copy88
Table 29 Control Software (Advanced Copy)88
Backup (SAN)89
Table 30 List of Functions (Copy Methods)89
Table 31 Characteristics of Snapopc/Snapopc+ Operations with each Type of Copy Destination Logical Volume90
Figure 48 REC91
Table 32 REC Data Transfer Mode92
Figure 49 Restore OPC94
Figure 50 EC or REC Reverse94
Figure 51 Targets for the Multi-Copy Function95
Figure 52 Multi-Copy95
Figure 53 Multi-Copy (Including Snapopc+)96
Figure 54 Multi-Copy (Using the Consistency Mode)96
Figure 55 Multi-Copy (Case 1: When Performing a Cascade Copy for an REC Session in Consistency Mode)97
Figure 56 Multi-Copy (Case 2: When Performing a Cascade Copy for an REC Session in Consistency Mode)97
Figure 57 Cascade Copy98
Table 33 Available Cascade Copy Combinations (When a Cascade Copy Performs Session 1 Followed by Session 2)98
Table 34 Modified Data Size for each Quickopc Resolution99
Table 35 Available Cascade Copy Combinations (When a Cascade Copy Performs Session 2 Followed by Session 1)100
Figure 58 Cascade Copy (Using Three Copy Sessions)102
Figure 59 Cascade Copy (Using Four Copy Sessions)102
Performance Tuning103
Striping Size Expansion103
Table 36 Available Stripe Depth103
Assigned Cms104
Figure 60 Assigned Cms104
Smart Setup Wizard105
Table 37 Guideline for the Number of Drives and User Capacities (When 1.92TB Ssds Are Installed)105
Figure 61 RAID Configuration Example (When 12 Ssds Are Installed)107
Table 38 Guideline for the Number of Drives and User Capacities (When 1.2TB SAS Disks Are Installed)107
Figure 62 RAID Configuration Example (When 15 SAS Disks Are Installed)109
SAN Functions110
Operations Optimization (Deduplication/Compression)110
Deduplication/Compression110
Figure 63 Deduplication/Compression Overview111
Figure 64 Deduplication Overview111
Figure 65 Compression Overview112
Table 39 Deduplication/Compression Function Specifications112
Table 40 Method for Enabling the Deduplication/Compression Function114
Table 41 Volumes that Are to be Created Depending on the Selection of "Deduplication" and "Com- Pression115
Table 42 Deduplication/Compression Setting for Tpps Where the Target Volumes Can be Created115
Figure 66 Details of the Deduplication/Compression Function117
Table 43 Management Functions for Deduplication/Compression Volumes118
Improving Host Connectivity120
Host Affinity120
Figure 67 Host Affinity120
Figure 68 Associating Host Groups, CA Port Groups, and LUN Groups121
Iscsi Security122
Stable Operation Via Load Control122
Quality of Service (Qos)122
Figure 69 Qos122
Figure 70 Copy Path Bandwidth Limit123
Host Response124
Figure 71 Host Response124
Storage Cluster125
Figure 72 Storage Cluster125
Figure 73 Mapping Tfovs, TFO Groups, and CA Port Pairs126
Table 44 Storage Cluster Function Specifications126
Data Migration129
Storage Migration129
Figure 74 Storage Migration130
Non-Disruptive Storage Migration131
Figure 75 Non-Disruptive Storage Migration131
Table 45 Specifications for Paths and Volumes between the Local Storage System and the External131
Server Linkage Functions133
Oracle VM Linkage133
Figure 76 Oracle VM Linkage133
Vmware Linkage134
Figure 77 Vmware Linkage134
Figure 78 VVOL (Operational Configuration)136
Figure 79 VVOL (System Configuration)137
Table 46 Maximum VVOL Capacity138
Table 47 VVOL Management Information Specifications138
Veeam Storage Integration140
Figure 80 Veeam Storage Integration140
Table 48 Volume Types that Can be Used with Veeam Storage Integration142
Microsoft Linkage143
Figure 81 Microsoft Linkage143
Openstack Linkage144
Logical Volume Manager (LVM)145
Figure 82 Logical Volume Manager (LVM)145
Connection Configuration146
SAN Connection146
Host Interface146
Table 49 Ethernet Frame Capacity (Jumbo Frame Settings)147
Access Method149
Figure 83 Single Path Connection (When a SAN Connection Is Used - Direct Connection)149
Figure 84 Single Path Connection (When a SAN Connection Is Used - Switch Connection)149
Figure 85 Multipath Connection (When a SAN Connection Is Used - Basic Connection Configuration)150
Figure 86 Multipath Connection (When a SAN Connection Is Used - Switch Connection)150
Figure 87 Multipath Connection (When a SAN Connection Is Used - for Enhanced Performance)151
Remote Connections152
Figure 88 Example of Non-Supported Connection Configuration (When Multiple Types of Remote Interfaces Are Installed in the same ETERNUS DX/AF)152
Figure 89 Example of Supported Connection Configuration (When Multiple Types of Remote Interfa- Ces Are Installed in the same ETERNUS DX/AF)152
Remote Interfaces153
Figure 90 an FC Connection for a Remote Copy between ETERNUS DX/AF Storage Systems (When Redundant Paths Are Used)153
Figure 91 an FC Connection for a Remote Copy between ETERNUS DX/AF Storage Systems (When Lines Are Used)153
Figure 92 an Iscsi Connection for a Remote Copy between ETERNUS DX/AF Storage Systems (When Lines Are Used)154
Connectable Models155
Table 50 Connectable Models and Available Remote Interfaces155
LAN Connection156
LAN for Operation Management (MNT Port)156
Figure 93 Connection Example Without a Dedicated Remote Support Port157
Figure 94 Connection Example When the IP Address of the Slave CM Is Set (and a Dedicated Remote Support Port Is Not Used)157
LAN for Remote Support (RMT Port)158
Figure 95 Overview of the AIS Connect Function158
Figure 96 Security Features159
Figure 97 Connection Example with a Dedicated Remote Support Port160
LAN Control (Master CM/Slave CM)161
Figure 98 Connection Example When the IP Address of the Slave CM Is Set (and a Dedicated Remote Support Port Is Used)161
Figure 99 LAN Control (Switching of the Master CM)162
Figure 100 LAN Control (When the IP Address of the Slave CM Is Set)162
Network Communication Protocols163
Table 51 LAN Port Availability163
Power Supply Connection164
Input Power Supply Lines164
UPS Connection165
Power Synchronized Connections166
Power Synchronized Connections (PWC)166
Figure 101 Power Supply Control Using a Power Synchronized Unit (When Connecting One or Two Servers)166
Figure 102 Power Supply Control Using a Power Synchronized Unit (When Connecting Three or more Servers)168
Power Synchronized Connections (Wake on LAN)169
Figure 103 Power Supply Control Using Wake on LAN169
Hardware Configurations170
Configuration Schematics170
Figure 104 Minimum Configuration Diagram: ETERNUS DX100 S4/DX200 S4170
Figure 105 Minimum Configuration Diagram: ETERNUS DX100 S3/DX200 S3171
Figure 106 Maximum Configuration Diagram: ETERNUS DX100 S4/DX200 S4172
Figure 107 Maximum Configuration Diagram: ETERNUS DX100 S3/DX200 S3174
Figure 108 Enclosure Connection Path (When Only One Controller Is Installed)176
Figure 109 Enclosure Connection Path (When Two Controllers Are Installed)176
Optional Product Installation Conditions177
Controller Module177
Memory Extension178
Host Interfaces179
Unified License180
Drive Enclosures181
I/O Module181
Table 52 Number of Installable Drive Enclosures181
Drives182
Table 53 Drive Characteristics184
Standard Installation Rules185
Controller Module185
Figure 110 Controller Installation Order185
Table 54 Number of Installable Drives185
Host Interface186
Figure 111 Installation Diagram for Host Interfaces (When Only One Controller Is Installed)186
Figure 112 Host Interface Installation Diagram 1 (When Two Controllers Are Installed in the ETERNUS DX100 S4/DX100 S3)186
Figure 113 Host Interface Installation Diagram 2 (When Two Controllers Are Installed in the ETERNUS DX100 S4/DX100 S3)186
Drive Enclosure187
Figure 114 Host Interface Installation Diagram (When Two Controllers Are Installed in the ETERNUS DX200 S4/DX200 S3)187
I/O Module188
Drive188
Figure 115 I/O Module Installation Order188
Figure 116 Drive Installation Diagram for High-Density Drive Enclosures189
Figure 117 Installation Diagram for 2.5" Drives190
Figure 118 Installation Diagram for 3.5" Drives191
Recommended RAID Group Configurations192
Figure 119 Drive Combination 1192
Figure 120 Drive Combination 2192
Figure 121 Drive Combination 3193
Figure 122 Drive Combination 4193
Figure 123 Drive Combination 5194
Maintenance/Expansion195
Hot Swap/Hot Expansion195
Table 55 Hot Swap and Hot Expansion Availability for Components (ETERNUS DX100 S4/DX200 S4)195
Table 56 Hot Swap and Hot Expansion Availability for Components (ETERNUS DX100 S3/DX200 S3)197
User Expansion198
Drive Sanitization198
Function Specification List199
List of Supported Protocols199
Table 57 List of Supported Protocols199
Target Pool for each Function/Volume List200
Target RAID Groups/Pools of each Function200
Target Volumes of each Function201
Combinations of Functions that Are Available for Simultaneous Executions203
Table 58 Combinations of Functions that Can be Executed Simultaneously (1/2)203
Table 59 Combinations of Functions that Can be Executed Simultaneously (2/2)204
Number of Processes that Can be Executed Simultaneously205
Capacity that Can be Processed Simultaneously205

Fujitsu ETERNUS DX100 S3 - Figure 6 RAID6 Concept

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