Compaq 4354R - StorageWorks Enclosure Storage Manuel de service Page 74
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2–20 HSG80 ACS Solution Software Version 8.6 for Compaq Tru64 UNIX Installation and Configuration Guide
Striped Mirrorset Planning Considerations
Striped mirrorsets (RAID 0+1) are a configuration of stripesets whose members are also
mirrorsets (Figure 2–15). Consequently, this kind of storageset combines the performance
of striping with the reliability of mirroring. The result is a storageset with very high I/O
performance and high data availability. Figure 2–16 shows a second example of a striped
mirrorset using six members.
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Figure 2–15. Striped mirrorset (example 1)
The failure of a single disk drive has no effect on the ability of the storageset to deliver
data to the host. Under normal circumstances, a single disk drive failure has very little
effect on performance. Because striped mirrorsets do not require any more disk drives than
mirrorsets, this storageset is an excellent choice for data that warrants mirroring.
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- Compaq StorageWorks 1
- First Edition (June 2001) 2
- Part Number: AA-RFAUD-TE 2
- Contents 3
- Chapter 2 4
- Chapter 3 5
- About this Guide 15
- Text Conventions 16
- Symbols in Text 17
- Symbols on Equipment 17
- Rack Stability 18
- Configuration Flowchart 19
- About this Guide xxi 21
- Getting Help 22
- Compaq Technical Support 22
- Compaq Website 23
- Compaq Authorized Reseller 23
- Chapter 1 25
- Planning a Subsystem 25
- Defining the Subsystems 26
- Controller” 27
- Model 2200 Enclosure 28
- Selecting a Failover Mode 29
- —normal operation 30
- Multiple-Bus Failover Mode 31
- Selecting a Cache Mode 33
- Read Caching 34
- Read-Ahead Caching 34
- Write-Back Caching 34
- Write-Through Caching 34
- Enabling Mirrored Caching 35
- The Command Console LUN 35
- Enabling the CCL 36
- Disabling the CCL 36
- D100 D101 D120D0 D1 38
- Planning a Subsystem 1–15 39
- Assigning Unit Numbers 40
- 0). Unit D102 will 41
- CXO6455B 42
- Failover Mode 43
- SCSI-3 Mode 44
- SCSI-2 Mode 44
- Switch or hub 46
- Planning a Subsystem 1–25 49
- Planning a Subsystem 1–29 53
- SHOW command to list the LUN 54
- Planning Storage 55
- Where to Start 56
- Configuration Rules 57
- CXO5851B 58
- Planning Storage 2–7 61
- Planning Storage 2–9 63
- CXO6186B 64
- Choosing a Container Type 65
- Creating a Storageset Profile 66
- Planning Storage 2–13 67
- CXO7287A 68
- CXO4592B 69
- A'A 71
- C'C 71
- Operating 72
- CXO7289A 74
- Controller 75
- Defining a Partition 76
- Switches 77
- Changing Switches 78
- RAIDset Switches 78
- Initialization Switches 79
- Chunk Size 80
- Save Configuration 82
- Destroy/Nodestroy 82
- Geometry 82
- Unit Switches 83
- Storage Maps 83
- Planning Storage 2–31 85
- − example storage map 85
- Planning Storage 2–33 87
- − example storage map 87
- Planning Storage 2–35 89
- Planning Storage 2–37 91
- Preparing the Host System 93
- Preparing the Host System 3–3 95
- CXO7382A 96
- Making a Physical Connection 97
- FileSystem 98
- Mounting the Filesystem 99
- Using genvmunix 100
- File Utility 101
- Reading from the device, dd 102
- For V4.0G and V5.1x 103
- V4.0G Output 103
- V5.1x Output 103
- For V4.0G 104
- For V5.1x 105
- Chapter 4 107
- Before Installing the Agent 111
- Enter Subsystem Information 113
- Final System Configuration 115
- Reconfiguring the Agent 119
- −Can use the 120
- Removing the Agent 121
- Chapter 5 123
- Configuration Procedures 123
- CXO7181A 124
- Cabling a Single Controller 125
- Connections 126
- Configure Controller Settings 127
- Restart the Controller 128
- Verify Installation 130
- For V4.0G Use 130
- For V5.1x Use 130
- Setting Up a Controller Pair 131
- CXO6887B 132
- Configuring Devices 137
- Configuring a Stripeset 137
- Configuring a Mirrorset 137
- Configuring a RAIDset 138
- Configuring a Partition 140
- Preferring Units 142
- Configuration Options 143
- Enabling Autospare 144
- Deleting a Storageset 145
- Changing Device Switches 146
- Changing Initialize Switches 146
- Changing Unit Switches 146
- Chapter 6 147
- Chapter 7 149
- Figure 7–2. Example system 151
- CLI Configuration Example 152
- Chapter 8 159
- Cloning Data for Backup 160
- RUN CLONE 161
- Moving Storagesets 164
- Appendix A 167
- Subsystem Profile Templates 167
- Storageset Profile 168
- Enclosure 169
- BA370 Enclosure 170
- 4214R Disk Enclosure 172
- 4254 Disk Enclosure 173
- 4310R Disk Enclosure 175
- 4350R Disk Enclosure 177
- 4314R Disk Enclosure 178
- 4354R Disk Enclosure 180
- Appendix B 181
- Before You Install the Client 182
- Installing the Client 182
- During Installation 183
- Host to the Navigation Tree 185
- About the User Guide 188
- About the Online Help 188
- Glossary 189
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