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SECURSTOR ASTRA ES 93
RAID 1E
Advantages
Disadvantages
Implemented as a mirrored disk array
whose segments are RAID 0 disk
arrays
High I/O rates are achieved thanks to
multiple stripe segments
Can use an odd number of disks
Very high disk overhead - uses only
50% of total capacity
Recommended Applications for RAID 1E
• Imaging applications
• Database servers
• General fileserver
RAID 5
Advantages
Disadvantages
High Read data transaction rate
Medium Write data transaction rate
Good aggregate transfer rate
Disk failure has a medium impact on
throughput
Recommended Applications for RAID 5
• File and Application servers
• WWW, E-mail, and News servers
• Intranet servers
• Most versatile RAID level
RAID 6
Advantages
Disadvantages
High Read data transaction rate
Medium Write data transaction rate
Good aggregate transfer rate
Safest RAID level, except for RAID 60
High disk overhead – equivalent of two
drives used for parity
Slightly lower performance than RAID 5
Recommended Applications for RAID 6
• Accounting and Financial
• Database servers
• Any application requiring very high availability
- SecurStor Astra ES 1
- Copyright ©2007 2
- Trademarks 2
- 4 EXCEL MERIDIAN DATA 4
- Table of Contents 4
- 6 EXCEL MERIDIAN DATA 6
- About This Manual 7
- 8 EXCEL MERIDIAN DATA 8
- Astra ES Overview 8
- Architectural Description 9
- Features and Benefits 9
- 10 EXCEL MERIDIAN DATA 10
- Specifications 10
- Warranty and Support 11
- FCC Statement 11
- CE Statement 11
- 12 EXCEL MERIDIAN DATA 12
- Unpacking the Astra ES 13
- 14 EXCEL MERIDIAN DATA 14
- Mounting Astra ES in a Rack 14
- Installing Disk Drives 15
- 16 EXCEL MERIDIAN DATA 16
- Configuring JBOD expansion: 17
- 18 EXCEL MERIDIAN DATA 18
- Configuring Cascaded Storage 19
- 20 EXCEL MERIDIAN DATA 20
- Connecting the Power 20
- Logging into Astra GUI 21
- 22 EXCEL MERIDIAN DATA 22
- Selecting a Language 22
- Perusing the Interface 22
- Logging out of Astra GUI 23
- 24 EXCEL MERIDIAN DATA 24
- Working with Subsystems 24
- 26 EXCEL MERIDIAN DATA 26
- Clearing NVRAM Events 27
- 28 EXCEL MERIDIAN DATA 28
- Viewing Lock Status 29
- Setting the Lock 29
- 30 EXCEL MERIDIAN DATA 30
- Managing Users 30
- Making User Settings 31
- 32 EXCEL MERIDIAN DATA 32
- Deleting a User 33
- Viewing User Sessions 33
- Logging out Other Users 33
- 34 EXCEL MERIDIAN DATA 34
- 36 EXCEL MERIDIAN DATA 36
- Managing SAS Connections 37
- 38 EXCEL MERIDIAN DATA 38
- Managing Storage Services 39
- 40 EXCEL MERIDIAN DATA 40
- Managing Software Services 40
- Managing SLP Settings 41
- 42 EXCEL MERIDIAN DATA 42
- Managing SNMP Settings 43
- 44 EXCEL MERIDIAN DATA 44
- Exporting the User Database 45
- 46 EXCEL MERIDIAN DATA 46
- Importing a User Database 46
- Viewing the Controllers 48
- 50 EXCEL MERIDIAN DATA 50
- Managing Enclosures 51
- 52 EXCEL MERIDIAN DATA 52
- Reconditioning a Battery 53
- Managing Buzzer Settings 53
- Testing the Buzzer 53
- 54 EXCEL MERIDIAN DATA 54
- Managing Physical Drives 54
- Adjustable Items 55
- 56 EXCEL MERIDIAN DATA 56
- Managing Disk Arrays 57
- 58 EXCEL MERIDIAN DATA 58
- 60 EXCEL MERIDIAN DATA 60
- Managing Disk Array Settings 61
- Creating a Logical Drive 61
- 62 EXCEL MERIDIAN DATA 62
- Rebuilding a Disk Array 63
- Running PDM on a Disk Array 63
- 64 EXCEL MERIDIAN DATA 64
- Managing Logical Drives 65
- 66 EXCEL MERIDIAN DATA 66
- Running Redundancy Check 67
- 68 EXCEL MERIDIAN DATA 68
- Managing Spare Drives 69
- 70 EXCEL MERIDIAN DATA 70
- 72 EXCEL MERIDIAN DATA 72
- Chapter 4: Maintenance 73
- 74 EXCEL MERIDIAN DATA 74
- Replacing a Power Supply 74
- Remove and Replace a Blower 75
- 76 EXCEL MERIDIAN DATA 76
- Replacing a Cache Battery 77
- 78 EXCEL MERIDIAN DATA 78
- Replacing a RAID Controller 78
- Single Controller Subsystem 79
- 80 EXCEL MERIDIAN DATA 80
- Introduction to RAID 81
- 82 EXCEL MERIDIAN DATA 82
- Data Mirror 83
- Disk Driv es 83
- 84 EXCEL MERIDIAN DATA 84
- Distributed Parity 85
- 86 EXCEL MERIDIAN DATA 86
- Data Stripe 87
- 88 EXCEL MERIDIAN DATA 88
- 90 EXCEL MERIDIAN DATA 90
- 92 EXCEL MERIDIAN DATA 92
- Choosing a RAID Level 92
- 94 EXCEL MERIDIAN DATA 94
- Choosing Stripe Size 95
- Choosing Sector Size 95
- 96 EXCEL MERIDIAN DATA 96
- Cache Policy 96
- LUN Affinity 96
- Capacity Coercion 97
- EXCEL MERIDIAN DATA 98
- RAID Level Migration 99
- 100 EXCEL MERIDIAN DATA 100
- Media Patrol 100
- Transition 101
- 102 EXCEL MERIDIAN DATA 102
- Automatic Transition 103
- Manual Transition 103
- 104 EXCEL MERIDIAN DATA 104
- Chapter 6: Troubleshooting 105
- 106 EXCEL MERIDIAN DATA 106
- Status LED 108
- Dirty Cache LED 108
- 110 EXCEL MERIDIAN DATA 110
- Event Notification Response 110
- 112 EXCEL MERIDIAN DATA 112
- (Enclosure Events) 113
- 114 EXCEL MERIDIAN DATA 114
- 116 EXCEL MERIDIAN DATA 116
- (Media Patrol Events) 117
- 118 EXCEL MERIDIAN DATA 118
- (PDM Events) 119
- 120 EXCEL MERIDIAN DATA 120
- (Physical Disk Events) 121
- 122 EXCEL MERIDIAN DATA 122
- (PSU Fans Events) 123
- 124 EXCEL MERIDIAN DATA 124
- (Rebuild Events) 125
- 126 EXCEL MERIDIAN DATA 126
- (Spare Check Events) 127
- (Spare Drives Events) 127
- (SMART Events) 127
- 128 EXCEL MERIDIAN DATA 128
- (Synchronization Events) 129
- (System Events) 129
- 130 EXCEL MERIDIAN DATA 130
- 132 EXCEL MERIDIAN DATA 132
- Incomplete Array 132
- Physical Drive Problems 132
- Physical Drive Failed 133
- 134 EXCEL MERIDIAN DATA 134
- Enclosure Problems 134
- 136 EXCEL MERIDIAN DATA 136
- Appendix A: SNMP MIB Files 137
- 138 EXCEL MERIDIAN DATA 138
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