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Figure 10 - 1: Selecting Maximum Drive Response
Timeout Value
To prepare the array for read-intensive applications, the following are
recommended:
1. Performance using the write-through caching mode is better than
that using the write-back mode on subsystems equipped with
redundant RAID controllers.
2. Arrays should not be partitioned.
3. The priorities for Rebuild or Add-drive operations should be set to
“low.”
4. Another timeout value, the “Drive I/O Timeout” which
determines whether a drive has eventually failed to respond to I/O
requests, is required as the first-level timeout.
10.2 AV Optimization Mode
The AV optimization is applied for the emerging streaming Audio/Video
applications. This option prepares the array for applications requiring
continuous reading such as video streaming.
- SCSI to SATA RAID 1
- Subsystems 1
- Operation Manual 1
- Contact Information 2
- Copyright 2006 3
- Table of Contents 4
- Chapter 7 Data Integrity 7
- Chapter 8 Array Expansion 8
- Appendix C. Event Message 9
- About This Manual 10
- Revision History 11
- Who should read this manual? 11
- Related Documentations 11
- Conventions 12
- CAUTION! 12
- WARNING! 12
- LCD Screen Messages 14
- 1.3 Logical Drive Status 15
- 1.4 Logical Volume Status 17
- 1.5 Drive Status 17
- CH0=Host = 18
- LCD Keypad Operation 22
- 2.2.5 Periodic Cache Flush 25
- 2.3 View Connected Drives: 26
- 2.4.4 Maximum Drive Capacity 28
- 2.4.6 Disk Reserved Space 28
- 2.4.7 Write Policy 28
- 2.4.8 Initialization Mode 29
- 2.4.9 Stripe Size 29
- 2.5.1 Initialization Mode 31
- 2.5.2 Write Policy 31
- Drive to Host LUN 33
- Settings 34
- 2.8.3 Rebuild Settings 35
- Drive Members 36
- 2.9.7 Write Policy 41
- 2.12.1 Viewing IDs 43
- 2.12.2 Adding a Channel ID 43
- 2.12.3 Deleting a Channel ID 43
- 2.12.4 Data Rate 45
- 2.13 System Functions 46
- 2.13.3 Reset Controller 47
- 2.13.4 Shutdown Controller 47
- 2.13.6 Saving NVRAM to Disks 48
- 2.13.8 Adjust LCD Contrast 49
- 2.14.1 Controller Name 49
- 2.15 Drive Utilities 51
- 2.15.1 Drive Read/Write Test 52
- Changing Password, 26 55
- Limitations on optimization 55
- Terminal Screen Messages 57
- 3.2 Main Menu 59
- 3.3 Quick Installation 59
- 3.4 Logical Drive Status 60
- 3.5 Logical Volume Status 62
- 3.6 Drive Status 62
- 3.7 Channel’s Status 64
- Terminal Operation 71
- 4.2 Caching Parameters 72
- Stripe Size: 73
- Opt. for Sequential I/O 73
- Opt. for Random I/O 73
- 4.4.1 Choosing a RAID Level 77
- 4.4.2 Choosing Member Drives 78
- 4.4.3.2 Assign Spare Drives 79
- 4.4.3.3 Disk Reserved Space 79
- 4.4.3.4 Write Policy 79
- 4.4.3.5 Initialization Mode 79
- 4.4.3.6 Stripe Size 80
- 4.5 RAID Migration 81
- 4.5.2 Migration Methods 82
- Figure 4 - 19: Confirm Box 84
- Figure 4 - 23: Confirm Box 85
- Figure 4 - 27: Confirm Box 88
- 4.10.9 Media Scan 99
- 4.10.10 Write Policy 100
- Function Availability 102
- 4.12.2 Disk Reserved Space 103
- 4.12.3 Identifying Drives 104
- 4.12.3.2 Flash All Drives 105
- IMPORTANT! 107
- 4.13.2 Adding an ID 108
- 4.13.3 Deleting an ID 108
- 4.14 System Functions 110
- 4.14.1 Mute Beeper 111
- 4.14.2 Change Password 111
- 4.14.3 Changing the Password 112
- 4.14.6 Reset Controller 113
- 4.14.7 Shutdown Controller 113
- 4.15 Controller Parameters 114
- 4.15.3 Saving NVRAM to Disks 115
- Time Zone 118
- Date and Time 118
- 4.16 View Drive Information 119
- 4.17 Drive Utilities 119
- Host-side and Drive-side 123
- Parameters 123
- Figure 5 - 1: SCSI ID/LUNs 124
- Connection 125
- 5.1.4 LUNs per Host ID 126
- 5.1.5 LUN Applicability 127
- 5.1.6 Peripheral Device Type 127
- 5.1.7 In-band (SCSI channel) 127
- Operating Systems 128
- 5.2 Drive-side Parameters: 132
- 5.2.1 Disk Access Delay Time 133
- 5.2.2 Drive I/O Timeout 133
- 5.2.5 Drive Delayed Write 136
- Enclosure Management 139
- The Operations 140
- The Trigger 140
- Operations 142
- 6.2 UPS Support 145
- Figure 6 - 11: I 147
- C Device Information 147
- This page is intentionally 148
- Data Integrity 150
- The Function: 154
- 7.2.1 Task Scheduler 154
- Creating a New Schedule 155
- 7.2.2 Task Scheduler Options 155
- Start Time and Date 156
- Execution Period 156
- Media Scan Mode 157
- Media Scan Priority 157
- Select Logical Drives 158
- Array Expansion 163
- 2. Size of the New Drive: 164
- 3. Applicable Arrays: 164
- 8.3 Mode 1 Expansion: 165
- Add Drive Procedure 166
- Figure 8 – 5: Select Drives 167
- 8.4 Mode 2 Expansion: 168
- Larger Capacity 168
- Copy and Replace Procedure 169
- Expand Logical Drive 171
- 8.6 Expand Logical Volume 173
- Extension in Windows 2000 173
- Example 174
- S.M.A.R.T. Configuration 182
- 9.1.2 Replace after Clone 183
- 9.1.3 Perpetual Clone: 184
- 9.1.4 S.M.A.R.T 186
- Disabled 187
- Detect Only: 187
- NOTE: 188
- Using S.M.A.R.T. Functions 191
- Implementations for AV 194
- Applications 194
- 10.2 AV Optimization Mode 195
- Firmware Functionality 198
- Specifications 198
- A.2 Advanced Features: 200
- A.3 Caching Operation: 202
- A.4 RAID Expansion: 204
- A.5 S.M.A.R.T. Support: 204
- A.6 Redundant Controller: 204
- A.7 Data Safety: 206
- A.8 System Security: 207
- A.9 Environment Management: 208
- A.10 User Interface: 209
- A.11 High Availability: 209
- System Functions: 211
- Upgrading Firmware 211
- Manager 212
- RAIDWatch Program 214
- Terminal Emulation 215
- Terminal Screen 216
- Figure B - 5: Sending Files 217
- Event Messages 220
- C.1 Logical Drive Events 221
- C.2.1 Critical: 223
- C.2.2 Warning: 223
- C.2.3 Notification: 224
- C.3 General Target Events 225
- C.4 Controller Events 227
- C.5 Logical Drive Events 228
- C.5.2 Notification: 232
- C.6.3 Notification: 243
- C.7 General Target Events 245
- C.8 Controller Events 252
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