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Storage Management Overview
52 NAS 2000s Administration Guide
This technology allows the safe deployment of large capacity disk drives and the creation of
very large storage volumes without expensive overhead to protect business critical data. This
technology provides more flexibility in responding to drive failures without the fear of costly
server downtime.
Advance Data Guarding protects against multiple disk failures, while requiring the capacity of
two drives in an array of up to 56 disk drives to be set aside for dual sets of distributed parity
data. It provides data protection greater than RAID 5, and also has the capacity utilization
efficiency similar to RAID 5.
Advantages
■ High read performance
■ High data availability-any two drives can fail without loss of critical data
Disadvantage
■ Relatively low write performance (lower than RAID 5), due to the need for two sets of
parity data
The table below summarizes the important features of the different kinds of RAID supported
by the Smart Array controllers. The decision chart in the following table may help determine
which option is best for different situations.
Table 3: Summary of RAID Methods
RAID 0
Striping (no
fault
tolerance)
RAID 1+0
Mirroring
RAID 5
Distributed
Data
Guarding
RAID ADG
Advanced
Data
Guarding
Usable drive space
formula
nn/2(n-1)/n(n-2)/n
Minimum number of
hard drives
1234
Maximum number of
hard drives
N/A N/A 14 56
Tolerant of single hard
drive failure?
No Yes Yes Yes
Tolerant of multiple
simultaneous hard drive
failure?
No For RAID
1+0, if the
failed drives
are not
mirrored to
each other
No Yes
(two drives
can fail)
- NAS 2000s 1
- Part Number: 345650-001 2
- Contents 10
- About This Guide 11
- About this Guide 11
- Overview 12
- Conventions 12
- Text Symbols 13
- Equipment Symbols 13
- Rack Stability 14
- Getting Help 15
- System Overview 17
- Product Redundancy 18
- Product Scalability 18
- Deployment Scenarios 19
- Environment Scenarios 20
- User Interfaces 21
- Menu Tabs 22
- Welcome Screen Contents 22
- NAS 2000s Desktop 23
- NAS Management Console 24
- NIC Team Setup 24
- Figure 3: Maintenance menu 26
- Figure 5: Shutdown menu 27
- Figure 6: Logs menu 28
- Using Remote Desktop 29
- Setting up E-mail Alerts 30
- Figure 8: Network menu 31
- Setup Completion 32
- 10. Restart the system 34
- Fault Tolerance 36
- NIC Teaming Troubleshooting 41
- Managing System Storage 42
- Storage Management Overview 43
- Storage Elements Overview 45
- Logical Drives (LUNs) 47
- Fault-Tolerance Methods 48
- Disadvantages 50
- Advantages 51
- Online Spares 53
- Partitions 53
- Utilizing DM Storage Elements 54
- File System Elements 55
- File-Sharing Elements 55
- Disk Management 57
- Step 1: Create Disk Arrays 59
- Array Configuration Utility 60
- ACU Guidelines 63
- Managing Disks 63
- Disk Management Utility 64
- Disk Management Guidelines 65
- Volumes Page 66
- Managing Volumes 68
- Dynamic Growth 69
- Extending using DiskPart 71
- Scheduling Defragmentation 72
- Disk Quotas 75
- Setting User Quota Entries 76
- DiskPart 78
- Example of using DiskPart 79
- Shadow Copies 81
- Shadow Copy Planning 82
- Allocating Disk Space 83
- Identifying the Storage Area 84
- Mounted Drives 85
- Managing Shadow Copies 86
- The Shadow Copy Cache File 87
- Set Schedules 90
- Disabling Shadow Copies 92
- SMB Shadow Copies 94
- NFS Shadow Copies 95
- Recovery of Files or Folders 96
- Recovering a Folder 100
- Backup and Shadow Copies 100
- User and Group Management 101
- User and Group Name Planning 102
- Managing Local Users 103
- Adding a New User 104
- Deleting a User 104
- Modifying a User Password 105
- Modifying User Properties 105
- Managing Local Groups 106
- Adding a New Group 107
- Deleting a Group 107
- Modifying Group Properties 108
- Folder, Printer, and Share 111
- Management 111
- Creating a New Folder 113
- Deleting a Folder 114
- Modifying Folder Properties 114
- ■ Folder Name 115
- ■ Folder Attributes 115
- 5. Select the user or group 121
- Share Management 124
- Managing Shares 126
- Deleting a Share 127
- Modifying Share Properties 128
- UNIX Sharing 129
- Web Sharing (HTTP) 130
- Protocol Parameter Settings 131
- DFS Protocol Settings 132
- DFS Administration Tool 133
- Setting DFS Sharing Defaults 134
- Creating a Local DFS Root 134
- Deleting a Local DFS Root 135
- Publishing a New Share in DFS 136
- Publish to DFS root 137
- Storage Management 138
- Establishing Directory Quotas 139
- File Screening 140
- Storage Reports 141
- Print Services 142
- Adding an Additional Printer 144
- TCP/IP Print Server service 145
- Microsoft Services for NFS 147
- Logging Events 149
- Directory Domain Controllers 152
- NFS File Shares 154
- Figure 86: UNIX Sharing tab 157
- NFS Only 158
- NFS Async/Sync Settings 159
- NFS Locks 160
- NFS Client Groups 162
- Adding a New Client Group 163
- Deleting a Client Group 163
- NFS User and Group Mappings 165
- Squashed Mappings 166
- General Tab 167
- Simple Mapping Tab 168
- Explicit User Mapping Tab 169
- Explicit Group Mapping Tab 170
- Backing up User Mappings 172
- Restoring User Mappings 172
- Remote Desktop 174
- NetWare File System 175
- Adding Local NetWare Users 178
- Managing NCP Volumes (Shares) 180
- Remote Access Methods and 187
- Monitoring 187
- Web Based User Interface 188
- Integrated Lights-Out Port 188
- Features 189
- Manage Alerts Feature 190
- Telnet Server 191
- HP Insight Manager Version 7 192
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