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Troubleshooting 106

Drive arrays and fault-tolerance methods

Drive arrays

The capacity and performance of a single physical (hard) drive is adequate for home users. However,

business users demand higher storage capacities, higher data transfer rates, and greater protection against

data loss when drives fail.

Connecting extra physical drives (Pn in the figure) to a system increases the total storage capacity but has no

effect on the efficiency of read/write (R/W) operations. Data can still be transferred to only one physical

drive at a time.

1 2 ... 101 102 103 104 105 106 107 108 109 110 111 ... 126 127

User Guide 1
Contents 3
Contents 4 4
Overview 5
Array configuration overview 6
Minimum requirements 8
Overview 9 9
Operations 10
Prerequisites 11
Specify the ISO image path 13
• NFS: 13
Using the HP SSA GUI 16
Icon and key stroke legend 17
Navigating the GUI 18
Configure screen 19
Operations 20 20
Diagnostics screen 21
HP SSA help 22
Configuration tasks 23
Configuring a controller 24
HP SSD Smart Path 26
Rapid Parity Initialization 27
Operations 29 29
Cache Manager 32
Click Caching Settings 33
About HP SmartCache 34
Enable HP SmartCache 34
Click OK 35
Working with mirrored arrays 38
Healing an array 41
Replacing an array 41
Setting Auto RAID 0 42
Operations 43 43
Diagnostic tasks 44
Using the HP SSA CLI 46
CLI syntax 47
The <target> variable 48
The <command> variable 48
Querying a device 48
Hiding warning prompts 49
Keyword abbreviations 49
The show command 50
Operations 51 51
Typical procedures 52
Setting the boot volume 53
Setting the target 53
Identifying devices 54
Deleting target devices 54
Erasing a physical drive 55
Rescanning the system 55
Creating a logical drive 56
Sample scenario 57
Moving a logical drive 58
Viewing SSD physical drives 59
Viewing SSD information 60
SmartCache in HPSSACLI 60
Managing spare drives 61
Expanding an array 62
Shrinking an array 63
Moving an array 63
Extending a logical drive 65
Migrating a logical drive 65
Operations 66 66
Operations 67 67
Operations 68 68
Operations 69 69
Using HP SSA scripting 70
Script file requirements 71
Sample custom input script 71
Operations 72 72
Sample custom capture script 73
Sample encryption script 74
Script file options 75
Control category 76
Controller category 77
Operations 78 78
Operations 79 79
Array category 80
Operations 81 81
Logical Drive category 83
Operations 84 84
Operations 85 85
Operations 86 86
Operations 87 87
Encryption support commands 88
Operations 89 89
XML support 90
Operations 91 91
XML input 92
XML input file DTD 92
Operations 93 93
Warning 94
Troubleshooting 101
Installing the utility 103
Diagnostic report procedures 104
Drive arrays 106
Troubleshooting 107 107
Troubleshooting 108 108
Fault-tolerance methods 109
Troubleshooting 110 110
Troubleshooting 111 111
Troubleshooting 112 112
Troubleshooting 113 113
RAID 50 114
RAID 60 115
Selecting a RAID method 116
Troubleshooting 117 117
Diagnosing array problems 118
Troubleshooting 119 119
Optional components 120
HP Smart Array Advanced Pack 121
Acronyms and abbreviations 122
Documentation feedback 124
Index 125 125
Index 126 126
Index 127 127

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