AcQuisition Technology Quad M-module Carrier i4000 Guide de l'utilisateur Page 88
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72 007-4522-003
4: Using the RAID Controller
Note: The priority of rebuild activity can be adjusted using the controller parameters to
adjust the Rebuild and check consistency rate.
In order to use the automatic rebuild feature, you must maintain an online spare disk
drive in the system. The number of online spare disk drives in a system is limited only
by the maximum number of disk drives available on each drive channel. SGI
recommends creating an online spare disk drive as part of the original configuration, or
soon after creating the original configuration. If the online spare disk drive is created
after a disk drive failure has occurred, the automatic rebuild does not start until the
controllers have been reset.
A disk drive may be labeled as an online spare using the “create hot spare option” of the
TPM configuration utility.
The RAID controllers also support the ability to perform a hot swap disk drive
replacement while the system is online. A disk drive can be disconnected, removed, and
replaced with a different disk drive without taking the system offline.
Caution: System drives associated with a failed or removed disk drive become critical.
Failure or removal of another disk drive may result in data loss.
The automatic rebuild feature is dependent upon having an online spare disk drive
available or hot swapping the failed disk drive with a replacement drive. If these
conditions are not met, the automatic rebuild features does not operate transparently, or
without user intervention. Automatic rebuild will not start if an online spare is
configured after a disk drive has failed.
Note: A “ghost drive” is created when a disk drive fails, power is removed from the
system, the disk drive is replaced or a spare drive is added to the system, and power is
returned to the system. Automatic rebuild does not occur in this situation. Additionally,
the system does not recognize the replacement/spare disk drive and creates a ghost
drive in the same location as the failed disk drive. If the replacement/spare disk drive
was inserted into the same slot as the failed drive, the ghost drive appears in the first
available empty slot, beginning with channel 0, target 0. The ghost drive represents a
deleted, dead drive that still exists in the configuration and the replacement/spare disk
drive has a drive state of unconfigured. In order for the rebuild to occur, the
replacement/spare disk drive’s state must change from unconfigured to online spare.
- Storage System User’s Guide 1
- Record of Revision 3
- Contents 5
- 007-4522-003 vii 7
- About This Guide 13
- Related Publications 14
- Product Support 15
- Reader Comments 16
- 1. Storage System Overview 17
- RAID Configuration Features 18
- SAN Mapping 256 19
- Drive Sizing Algorithm 19
- 4 007-4522-003 20
- 1: Storage System Overview 20
- JBOD Configuration Features 21
- Availability Features 21
- Supported Platforms 21
- Storage System Enclosure 22
- 007-4522-003 7 23
- Enclosure Components 24
- • Dummy drive carrier modules 25
- Operators (Ops) Panel 27
- PSU/Cooling Module 28
- 007-4522-003 13 29
- Figure 1-7 PSU/Cooling Module 29
- RAID LRC I/O Modules 30
- Host 1Host 0 31
- RAID Loopback LRC I/O Modules 32
- JBOD LRC I/O Module 34
- Drive Carrier Module 35
- Drive Carrier Handle 36
- Anti-tamper lock 37
- Unlocked 37
- Indicator 37
- Enclosure Bay Numbering 38
- Tower Enclosure Bay Numbering 40
- Storage System Rack 42
- 007-4522-003 27 43
- 28 007-4522-003 44
- 007-4522-003 29 45
- 007-4522-003 31 47
- Storage System Tower 48
- 007-4522-003 33 49
- 34 007-4522-003 50
- Connecting to a Host 51
- 36 007-4522-003 52
- Grounding Issues 53
- 38 007-4522-003 54
- System/ESI fault LED 55
- Power on LED 55
- PSU/cooling/temperature 55
- Alarm mute switch 55
- 40 007-4522-003 56
- Powering On the Rack 58
- 007-4522-003 43 59
- ON shows 59
- I”=on, “O”=off) 59
- Powering Off 60
- 007-4522-003 45 61
- 46 007-4522-003 62
- 007-4522-003 47 63
- Configuration on Disk (COD) 64
- Drive Roaming 65
- Data Caching 66
- 007-4522-003 51 67
- RAID Disk Topologies 68
- This configuration: 69
- 4. Using the RAID Controller 75
- RAID Levels 76
- 007-4522-003 61 77
- Array Condition Meaning 79
- RAID Levels and Availability 80
- Disk Topologies 81
- RAID (base) enclosure 83
- First expansion enclosure 83
- (Enclosure ID 1) 83
- (Enclosure ID 2) 83
- System Drives 84
- Drive State Reporting 85
- State Description 86
- Automatic Rebuild 87
- 72 007-4522-003 88
- 4: Using the RAID Controller 88
- 007-4522-003 73 89
- 5. Troubleshooting 91
- RAID Guidelines 92
- 007-4522-003 77 93
- 78 007-4522-003 94
- 7 address ranges 97
- 82 007-4522-003 98
- PSU good LED 100
- DC ouput fail LED 100
- AC input fail LED 100
- Fan fail LED 100
- RAID LRC I/O Module LEDs 101
- Expansion 103
- JBOD LRC I/O Module LEDs 105
- Drive Carrier Module LEDs 106
- present 107
- Thermal Control 108
- Using Test Mode 109
- 94 007-4522-003 110
- 5: Troubleshooting 110
- Adding a Drive Carrier Module 111
- Torx screwdriver 112
- 007-4522-003 99 115
- A. Technical Specifications 119
- Component Weight 120
- Specification Value 120
- Environmental Requirements 121
- Power Requirements 122
- LRC I/O Module Specifications 123
- Factor Requirement 124
- B. Regulatory Information 125
- Attention 126
- VCCI Class 1 Statement 126
- Class A Warning for Taiwan 127
- 114 007-4522-003 130
- 116 007-4522-003 132
- 118 007-4522-003 134
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