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ReadyNAS 2100 User Manual
X-RAID2 and RAID C-1
v1.1, June 2009
Appendix C
X-RAID2 and RAID
This appendix introduces the main benefits of X-RAID2, and provides an overview of RAID. The
ReadyNAS 2100 supports both X-RAID2 and Flex-RAID mode. Flex-RAID mode enables a more
standard RAID configuration, whereas the proven second generation X-RAID2 mode is an auto-
expandable RAID technology that is available only on ReadyNAS and is the default configuration
on the ReadyNAS 2100.
The Benefits of X-RAID2
RAID stands for Redundant Array of Independent Disks, which is a way of protecting your data in
case of a disk failure. Managing RAID volumes can be a complex chore but X-RAID2 eliminates
the complexity of volume management.
X-RAID2 Is Auto-Expandable RAID
Over time, people will expand volume capacity to either add redundancy or more file storage
space. In typical RAID systems, the steps required for expanding volumes can be so complex and
error prone that it leads to data loss. X-RAID2 enables volume expansion without reformatting the
disks in the system or shuffling your data back and forth. X-RAID2 automates these complex tasks
while providing volume management features previously available only in enterprise-level storage
solutions.
Simplified Redundancy
X-RAID2 has one data volume that requires a minimum of one disk overhead to provide
redundancy and protect against disk failure. In a two-disk X-RAID2 volume, the usable capacity is
one disk, in a three-disk volume the usable capacity is two disks, in a four-disk volume, the usable
capacity is three disks, etc.
Even with RAID, there is no data redundancy with one disk; if that disk fails, your data is lost. If
you have a one-disk ReadyNAS and want protection from disk failure, you have to add a second
disk that is at least as large as the first. It can be ‘hot-added’ while the ReadyNAS is running.
- ReadyNAS 2100 User 1
- Contents 5
- About This Manual 9
- User Manual Revision History 10
- Chapter 1 11
- Getting Acquainted 11
- The Benefits of X-RAID2 12
- Control Panel 13
- 1-4 Getting Acquainted 14
- Initial Setup 15
- The RAIDar Setup Utility 16
- Getting Acquainted 1-7 17
- Figure 1-6 17
- Figure 1-7 17
- 1-8 Getting Acquainted 18
- Figure 1-8 18
- Figure 1-9 18
- Chapter 2 19
- Managing Your ReadyNAS 2100 19
- Ethernet Interfaces 20
- Figure 2-3 21
- Figure 2-4 21
- Figure 2-5 22
- Figure 2-6 23
- Figure 2-7 23
- Global Network Settings 24
- Figure 2-9 25
- Figure 2-10 25
- Updating the Admin Password 26
- Figure 2-12 27
- Standard File Protocols 28
- Discovery Services 30
- Figure 2-15 31
- Figure 2-16 32
- Figure 2-17 33
- Figure 2-18 33
- Volume Management for X-RAID2 35
- Figure 2-20 37
- Working with USB Volumes 38
- Adjusting System Settings 40
- Figure 2-24 41
- Figure 2-25 42
- Figure 2-26 43
- Figure 2-27 44
- Language Settings 45
- Updating ReadyNAS 2100 46
- Figure 2-30 47
- Configuration Backup 48
- Chapter 3 49
- Managing User Access 49
- User Security Mode 50
- Managing User Access 3-3 51
- Domain Security Mode 52
- Managing User Access 3-5 53
- Figure 3-4 53
- Managing Groups 54
- Managing Users 56
- Changing User Passwords 58
- Managing Shares 59
- Managing User Access 3-13 61
- Figure 3-12 61
- 3-14 Managing User Access 62
- Managing User Access 3-15 63
- Figure 3-13 63
- Figure 3-14 63
- 3-16 Managing User Access 64
- Figure 3-15 64
- Figure 3-16 64
- Managing User Access 3-17 65
- Figure 3-17 65
- 3-18 Managing User Access 66
- Figure 3-18 66
- Figure 3-19 66
- FTP/FTPS 67
- 3-20 Managing User Access 68
- Figure 3-21 68
- Remote Access 69
- 3-22 Managing User Access 70
- Figure 3-23 70
- Figure 3-24 70
- Remote FTP Access 71
- 3-24 Managing User Access 72
- Figure 3-27 72
- Remote HTTP Access 73
- 3-26 Managing User Access 74
- Figure 3-29 74
- Chapter 4 75
- Securing Your Data 75
- 4-2 Securing Your Data 76
- Figure 4-1 76
- Securing Your Data 4-3 77
- 4-4 Securing Your Data 78
- Securing Your Data 4-5 79
- Figure 4-2 79
- 4-6 Securing Your Data 80
- Figure 4-3 80
- Viewing the Backup Schedule 81
- Programming the Backup Button 82
- Viewing the Backup Log 82
- MAC OS X Time Machine Backup 83
- Snapshots 83
- 4-10 Securing Your Data 84
- Figure 4-8 84
- Securing Your Data 4-11 85
- Figure 4-9 85
- Figure 4-10 85
- 4-12 Securing Your Data 86
- Figure 4-11 86
- Figure 4-12 86
- Securing Your Data 4-13 87
- Internet access 88
- Chapter 5 89
- Optimizing Performance and 89
- Maintaining the System 89
- Adding a UPS 90
- Power Management 91
- Power Timer 92
- Wake-On-LAN 92
- Viewing System Status 93
- Figure 5-6 94
- Shutdown 96
- Replacing a Failed Disk 97
- Choosing a Replacement Disk 98
- Resynchronizing the Volume 99
- ReadyNAS 2100 User Manual 100
- Figure 5-16 102
- Figure 5-17 102
- Figure 5-18 103
- Figure 5-19 103
- Figure 5-20 104
- Figure 5-21 104
- Appendix A 105
- Default Settings 105
- A-2 Default Settings 106
- Appendix B 107
- AFP over Bonjour 108
- AFP over AppleTalk 109
- Figure B-6 110
- Figure B-7 110
- MAC OS 9 111
- Figure B-10 112
- Figure B-11 112
- Figure B-12 113
- Appendix C 115
- X-RAID2 and RAID 115
- Overview of RAID 116
- RAID Basics 117
- RAID Levels 117
- C-4 X-RAID2 and RAID 118
- Numerics 119
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