D-Link DSN-1100-10 - xStack Storage Area Network Array Hard Drive User's Guide Page 117
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XStack Storage User’s Guide 117
5.5 Performing Cache Activities
The XStack Storage unit contains cache memory for storing I/O activity and data. The File menu
provides options for setting the cache mode and flushing cache contents.
5.5.1 Setting Cache Mode
The XStack Storage unit is capable of caching write operations. Write-back caching saves the
system from performing many unnecessary write cycles to the system RAM, which can lead to
noticeably faster execution. However, when write-back caching is used, writes to cached
memory locations are only placed in cache and the data is not written to the disks until the
cache is flushed. When caching is disabled, all read and write operations directly access the
physical disks. By default, write-back cache mode is always enabled and cannot be disabled.
- User’s Guide 1
- Trademarks 2
- Safety Information 3
- Compliance Information 3
- Notice of Export Controls 3
- Document Revision Level 3
- Preface 4
- Contact Information 5
- Contents 7
- List of Figures 11
- List of Tables 13
- Chapter 1 Introduction 15
- 1.1 Models 16
- 1.2 Hardware Enclosure 16
- 1.3 Benefits 17
- 1.4 Features 18
- 1.5 System Overview 19
- 1.6 Applications 20
- 1.6.1 Storage Consolidation 20
- 1.6.2 Server Consolidation 20
- 22 Chapter 1 Introduction 22
- 2.1 Overview 24
- 2.2 Understanding iSCSI 24
- The initiator node 25
- The target node 25
- 2.4 Volumes 26
- 2.5 Spare Count 28
- 2.6 Tasks 28
- 3.1 Front Panel Components 32
- 3.1.1 LEDs 33
- 3.1.2 Key Lock and Latches 33
- 3.1.3 Drive Bays 34
- 3.1.4 Front Vents 35
- 3.2 Back Panel Components 36
- 3.2.1 Switches 36
- 3.2.2 External Interfaces 37
- 3.2.2.2 DSN-3200 LEDs 38
- 3.2.2.4 DSN-3400 LEDs 40
- 3.2.3 Rear Vents 40
- 4.1 Site Considerations 43
- 4.2 Safety Considerations 44
- 4.11 Configuration Methods 53
- 5.1 Getting Started 56
- Title Bar 59
- Menu Bar 59
- Tool Bar 59
- 5.1.2.2 Resources Panel 60
- 5.1.2.3 Main Display Area 61
- 5.1.2.4 Footer 63
- 5.3.1 Working with Volumes 69
- 5.3.1.1 Creating a Volume 69
- 5.3.1.3 Expanding a Volume 77
- 5.3.1.4 Deleting Volumes 78
- 5.3.3.4 Deleting LAGs 89
- 5.3.14 Saving the Event Log 113
- 5.4 Managing User Accounts 114
- 5.5.1 Setting Cache Mode 117
- 6.1 XStack Storage Screens 124
- 6.1.2 Viewing Log Messages 126
- Delete the task 129
- Figure 6-6. Task Popup Menu 130
- Slot number 134
- Capacity 134
- Utilization percentage 134
- Allocation 134
- Drive number 141
- Vendor model 141
- Physical capacity 141
- Microcode level 141
- A.1 File Menu 151
- A.2 View Menu 152
- A.3 Storage Menu 153
- A.4 Network Menu 154
- A.5 iSCSI Menu 154
- A.6 Help Menu 155
- D.1 Recording Volumes 162
- D.3 Recording LAGs 166
- E.2 Network Classes 178
- E.3 Network Masks 181
- E.4 Understanding Subnets 182
- F.1 Front View 189
- F.2 Back View 189
- 194 Index 194
- 196 Index 196
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