Apc SGI 15000 RAID User Manual Page 68
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For example, a user is given access to internal LUNs 5, 6, and 7, which are mapped to external LUNs 0,
1, and 2, respectively. controller 1 owns LUNs 0 and 1 while controller 2 owns LUN 2. The user is
physically connected to controller 1, thus, they will only see LUNs 0 and 1. The user will not be able to
access LUN 2. If the user was physically connected to controller Unit 2, the reverse would be true: only
LUN 2 would be accessible. When a controller fails, the user will be given access to all mapped LUNs
regardless of the physical connection.
Data cache is not copied from one controller to another. If a controller fails, all “dirty” data in cache will
be lost. Thus if power failures are a concern, writeback cache should be disabled.
DUAL COHERENCY=ON|OFF enables/disables the cache coherency function.
Default is dual
coherency disabled which is the non-cache coherent configuration.
DUAL TIMEOUT=X allows you to set the cache coherency timeout for cache node requests in seconds.
Valid range is <0...255>. Default is zero (0) seconds. The timeout value should be less than the host
timeout value (HOST TIMEOUT=X). A timeout value of 0 allows for only one retry.
NOTE :
In dual mode, LUNs will be “owned” by the controller unit on which they are created.
Hosts will only see the LUNs on the controller to which they are connected, unless cache
coherency is enabled.
3.2.12.2 Fail / Restore the Other Controller Unit in the Couplet Pair
To fail the other controller unit in the system (for example, in order to perform maintenance), enter:
dual fail
<Enter>
The healthy controller unit will take ownership of all the LUNs/tiers from the failed controller unit.
To restore the other controller unit in the system to healthy status after failure recovery, enter:
dual heal
<Enter>
Ownership of LUNs/tiers are transferred back to the formerly failed controller unit.
3.2.12.3 Labeling the Controller Unit(s)
You may change the label assigned to each controller unit. This allows you to uniquely identify each unit
in the controller system. The CLI prompt for each controller is built by adding a colon (:) and a space at
the end of the label. Each controller can have a label up to 31 characters long.
To change the label:
1. Type: dual label=1|2
<Enter>.
2. Select which unit you want to rename (Figure 3–28).
3. When prompted, type in the new label for the selected unit. The new name is displayed.
NOTE :
If you type DEFAULT for the new label, the label for the unit is restored to its default
setting.
- InfiniteStorage 15000 RAID 1
- User’s Guide 1
- COPYRIGHT 2
- Contents 3
- 007-5510-002 i 3
- 007-5510-002 iii 5
- International Standards 7
- Interference 7
- European Regulations 8
- Qualified Personnel 8
- Safe Handling 8
- 007-5510-002 vii 9
- Rack System Precautions 11
- ESD Precautions 12
- Data Security 12
- 007-5510-002 xi 13
- Chapter 1 15
- Introduction 15
- 1.2 The Controller Hardware 16
- Front (behind cover panel) 17
- 4 007-5510-002 18
- 007-5510-002 5 19
- Figure 1–4 Host Port LEDs 20
- 007-5510-002 7 21
- 8 007-5510-002 22
- 007-5510-002 9 23
- Chapter 2 25
- Controller Installation 25
- 2.2 Unpacking the System 26
- Figure 2–1 I/O Connectors 27
- 2.2.6.1 Basic Key Operations 28
- 007-5510-002 15 29
- 2.3.2 Configuration Interface 31
- 2.3.3 Login as Administrator 31
- <Enter> 32
- tier config 33
- 2.3.6.1 Heading Definitions 34
- dual label 35
- 007-5510-002 25 39
- 26 007-5510-002 40
- Chapter 3 43
- Controller Management 43
- Remotely - Telnet 44
- 3.1.3.1 Login 44
- 3.1.3.2 Logout 45
- 3.1.3.3 Password 45
- 3.1.3.4 Who Am I 45
- CLI session: 46
- 15000 [1]: whoami 46
- 3.2.1.2 Host Status 47
- 3.2.1.1 Host ID 47
- Host WWN 47
- 3.2.1.3 Host IB Users 48
- 3.2.1.4 Host Port Speed 48
- Disk and Channel Information 48
- . The tier 49
- 36 007-5510-002 50
- 007-5510-002 37 51
- 3.2.2.1 Tier View 52
- 3.2.2.2 Tier Configuration 53
- 3.2.2.3 LUN View 54
- 3.2.2.4 LUN Configuration 55
- 3.2.2.5 LUN Reservations 55
- 42 007-5510-002 56
- 3.2.4.1 Telnet 57
- 3.2.4.2 SNMP & Syslog 58
- 3.2.5.1 System Restart 59
- 3.2.5.2 System Shutdown 60
- 3.2.6.1 System Date 60
- 3.2.6.2 System Time 61
- 15000 [1]: save 61
- 3.2.9.2 Creating a LUN 62
- 3.2.9.3 Formatting a LUN 63
- 3.2.9.5 Changing a LUN Label 63
- lun label 63
- 3.2.9.7 Deleting a LUN 64
- SCSI Reservations 64
- 3.2.11 SMART Command 65
- 52 007-5510-002 66
- 3.2.12.1 Cache Coherent 67
- Non-Cache Coherent 67
- (Figure 3–28) 68
- 3.3 Performance Management 69
- 3.3.1.1 Cache Segment Size 70
- 3.3.1.3 Prefetch Settings 70
- 3.3.1.4 Cache Settings Reset 71
- Disk Configuration Settings 71
- 58 007-5510-002 72
- 3.3.3 Locking LUN in Cache 73
- 007-5510-002 61 75
- 62 007-5510-002 76
- 100msec intervals 77
- 64 007-5510-002 78
- (Figure 79
- 3.3.4 Resources Allocation 80
- 007-5510-002 67 81
- 68 007-5510-002 82
- 3.3.4.3 Rebuild Journaling 83
- 70 007-5510-002 84
- 15000 [1]: ses m_wait 85
- SES timer m_wait = 6 seconds 85
- 3.3.4.5 Host Command Timeout 86
- 3.4.1 Monitoring User Logins 87
- 3.4.3 User Authentication 88
- 007-5510-002 75 89
- 3.6 Remote Login Management 90
- 15000 [1]: 91
- (Figure 3–57). The 92
- 3.7 System Logs 93
- 80 007-5510-002 94
- 15000 [1]: apc_ups 95
- 15000 [1]: api 95
- 3.8.5 Disk Diagnostics 96
- 3.8.7 SPARE Commands 97
- 84 007-5510-002 98
- Chapter 4 99
- (Figure 4–3) 100
- Troubleshooting 101
- 007-5510-002 87 101
- 88 007-5510-002 102
- 4.1.4.2 Traps 103
- 4.2.1.1 Power Supply Failure 103
- 4.2.1.2 Fan Failure 104
- 007-5510-002 91 105
- 92 007-5510-002 106
- 007-5510-002 93 107
- (Figure 4–7) 108
- Chapter 5 109
- Drive Enclosure System 109
- 5.2 Enclosure Core Product 110
- 5.3 The Plug-in Modules 111
- Table 5–1 PCM LEDs 112
- Figure 5–5 I/O Module 113
- Table 5–2 I/O Module LEDs 113
- 5.3.4 DEM Card 114
- 5.4 Indicators 115
- Table 5–3 Display Panel LEDs 116
- Audible Alarm 116
- 5.4.2 Internal Indicators 118
- 5.6.1 Dimensions 119
- 5.6.2 Weight 120
- 5.6.3 AC INPUT PCM 120
- 5.6.4 DC INPUT PCM 120
- 5.7 Environment 121
- Chapter 6 123
- Drive Enclosure Installation 123
- 110 007-5510-002 124
- 007-5510-002 111 125
- 6.4.1 Controller Options 126
- 6.5 SAS DEM 127
- 6.6 SATA Interposer Features 127
- 6.8 Grounding Checks 127
- Chapter 7 129
- Drive Enclosure Operation 129
- 7.2.2 I/O Panel LEDs 130
- Chapter 8 131
- 8.3 LEDs 132
- 8.3.4 I/O Module 133
- 120 007-5510-002 134
- 8.4 Audible Alarm 135
- 8.5 Troubleshooting 135
- Symptom Cause Action 136
- 8.5.2 Thermal Alarm 137
- 8.5.3 Thermal Shutdown 137
- 8.8 Replacing a Module 138
- 007-5510-002 125 139
- 8.8.2 I/O Module 140
- 8.9 Replacing the DEM 141
- 007-5510-002 143
- Drive Addressing 145
- 007-5510-002 152
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