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Example
Schedule parameters are set as follows
Recur: Every 1 day
Frequency: Once at 6 PM
Number of levels: 4
This is how the first 14 days (or 14 sessions) of this scheme's schedule look. Shaded numbers denote
backup levels.
1 2 3 4 5 6 7 8 9 10 11 12 13 14
4
1
2
1
3
1
2
1
4
1
2
1
3
1
Backups of different levels have different types:
Last-level (in this case, level 4) backups are full;
Backups of intermediate levels (2, 3) are differential;
First-level (1) backups are incremental.
A cleanup mechanism ensures that only the most recent backups of each level are kept. Here is how
the archive looks on day 8, a day before creating a new full backup.
1 2 3 4 5 6 7 8
4 1 2 1 3 1 2 1
The scheme allows for efficient data storage: more backups accumulate toward the current time.
Having four backups, we could recover data as of today, yesterday, half a week, or a week ago.
Roll-back period
The number of days we can go back in the archive is different on different days. The minimum
number of days we are guaranteed to have is called the roll-back period.
The following table shows full backup and roll-back periods for schemes of various levels.
Number of
levels
Full backup
every
On different
days, can go
back
Roll-back
period
2 2 days 1 to 2 days 1 day
3 4 days 2 to 5 days 2 days
4 8 days 4 to 11 days 4 days
5 16 days 8 to 23 days 8 days
6 32 days 16 to 47 days 16 days
Adding a level doubles the full backup and roll-back periods.
To see why the number of recovery days varies, let us return to the previous example.
Here are the backups we have on day 12 (numbers in gray denote deleted backups).
1 2 3 4 5 6 7 8 9 10 11 12
4
1
2
1
3
1
2
1
4
1
2
1
- Workstation 1
- Table of contents 3
- 1 Introducing Acronis 6
- Backup & Recovery™ 10 6
- Navigation tree 8
- Shortcuts bar 8
- Actions 9
- How to expand/minimize panes 10
- Action pages 11
- Action page - Controls 12
- 1.3.1 Agent for Windows 13
- 1.4 Supported file systems 14
- 1.6 System requirements 15
- 1.7 Technical support 16
- 2.1 Basic concepts 17
- Backup using bootable media 19
- Incremental backup 22
- Differential backup 22
- 2.4 Owners and credentials 23
- 2.5 GFS backup scheme 24
- GFS by Acronis 25
- The resulting archive: ideal 26
- The resulting archive: real 27
- Tower of Hanoi overview 28
- Tower of Hanoi by Acronis 29
- 2.7 Retention rules 30
- Combination of rules 1 and 2 32
- Best practices 33
- Backing up dynamic volumes 33
- Recovering dynamic volumes 34
- 2.9 Tape support 35
- 2.10.1 Acronis Secure Zone 37
- Restore) 38
- Limitations 40
- Getting Universal Restore 40
- Supported operating systems 40
- Limitation 40
- How it works 40
- Usage scenarios 41
- How to use 41
- 3 Options 42
- 3.1.3 Time-based alerts 43
- 3.1.4 Number of tasks 43
- 3.1.5 Fonts 43
- 3.2 Machine options 44
- 3.2.1.2 SNMP notifications 45
- 3.2.2 Log cleanup rules 46
- 3.3.1.1 Archive protection 49
- 3.3.1.3 Pre/Post commands 50
- Pre-backup command 51
- Post-backup command 51
- Pre-data capture command 52
- Post-data capture command 53
- Always create a snapshot 54
- Do not create a snapshot 54
- 3.3.1.8 Compression level 55
- 3.3.1.9 Backup performance 56
- Backup priority 56
- HDD writing speed 56
- Network connection speed 56
- 3.3.1.10 Notifications 57
- Messenger service (WinPopup) 58
- 3.3.1.11 Event tracing 59
- Windows event log 59
- SNMP notifications 59
- 3.3.1.13 Backup splitting 60
- 3.3.1.15 Media components 61
- 3.3.1.16 Error handling 62
- 3.3.1.17 Dual destination 63
- Skip the task execution 64
- Reset archive bit 66
- Use FTP in Active mode 67
- 3.3.2.1 Pre/Post commands 68
- Pre-recovery command 69
- Post-recovery command 69
- 3.3.2.2 Recovery priority 70
- 3.3.2.3 File-level security 70
- 3.3.2.4 Notifications 70
- 3.3.2.5 Event tracing 72
- 3.3.2.6 Error handling 73
- 3.3.2.7 Additional settings 74
- 4 Vaults 76
- 4.1 Personal vaults 77
- Vault content 78
- How can I merge two vaults? 79
- 4.2 Common operations 80
- To show or hide columns 82
- 5 Scheduling 83
- 5.1 Daily schedule 84
- first at 8 AM 85
- second at 12 PM (noon) 85
- third at 3 PM 85
- fourth at 5 PM 85
- fifth at 7 PM 85
- 5.2 Weekly schedule 86
- 5.3 Monthly schedule 88
- 5.5 Conditions 92
- 5.5.3 Fits time interval 93
- 5.5.4 User logged off 94
- Example: 95
- 6 Direct management 96
- Activities 97
- System view 98
- Way of working 98
- Backup plan execution states 99
- Backup plan statuses 99
- Task states 100
- Task statuses 101
- Backup plan (p. 111) 102
- Recovery task (p. 130) 102
- Validation task (p. 147) 102
- Run backup plan 106
- Task details 106
- Archive 107
- Settings 107
- Progress 107
- Backup plan details 108
- 6.1.3 Log 109
- Configuring the log table 110
- 6.2 Creating a backup plan 111
- What to backup 112
- Where to back up 112
- How to back up 112
- Archive validation 112
- Backup options 112
- Convert to VM 113
- 6.2.3 Source type 114
- 6.2.4 Items to back up 114
- 6.2.6 Exclusions 116
- 6.2.7 Archive 117
- 6.2.9 Backup schemes 119
- 6.2.9.3 Simple scheme 120
- Examples 121
- At a glance 123
- Parameters 123
- Example 124
- Roll-back period 124
- Resulting tasks 127
- 6.2.10 Archive validation 128
- 6.3 Recovering data 130
- Where to recover 131
- When to recover 131
- Recovery options 131
- 6.3.1 Task credentials 132
- 6.3.2 Archive selection 132
- 6.3.3 Data type 133
- 6.3.4 Content selection 133
- 6.3.4.2 Files selection 134
- 6.3.6 Destination selection 135
- Disk destination 136
- NT signature 136
- 6.3.6.2 Volumes 136
- MBR destination 137
- Volume destination 137
- Volume properties 138
- Storage 139
- 6.3.6.5 File destination 140
- Recovery exclusions 140
- 6.3.8 When to recover 141
- 6.3.9 Universal Restore 142
- Windows NT/2000/XP/2003 147
- Windows Vista/2008 147
- 6.4.1 Task credentials 148
- 6.4.2 Archive selection 149
- 6.4.3 Backup selection 150
- 6.4.4 Location selection 150
- 6.5 Mounting an image 151
- 6.5.1 Archive selection 152
- 6.5.2 Backup selection 153
- 6.5.3 Access credentials 153
- 6.5.4 Volume selection 153
- 6.6 Managing mounted images 154
- 6.7.1 Task credentials 156
- 6.7.2 Archive selection 157
- 6.7.3 Backup selection 158
- 6.7.5 Location selection 158
- 2. Using the archives table 159
- 3. Naming the new archive 159
- 6.8 Acronis Secure Zone 160
- To set up a password 161
- To disable password 161
- 6.8.1.4 Result confirmation 162
- 6.10 Bootable media 164
- Linux-based bootable media 165
- PE-based bootable media 165
- Using Bart PE 166
- Kernel parameters 167
- Network settings 169
- Network port 170
- To add an iSCSI device 174
- To add an NDAS device 174
- Linux commands and utilities 175
- 6.11 Disk management 179
- 6.11.1 Basic precautions 180
- 6.11.5 Disk operations 181
- 6.11.5.2 Basic disk cloning 182
- Using advanced options 183
- System disk conversion 186
- 6.11.6 Volume operations 187
- 6.11.6.1 Creating a volume 188
- Types of dynamic volumes 188
- Create volume wizard 189
- Select destination disks 189
- Set the volume size 190
- Set the volume options 190
- 6.11.6.2 Delete volume 191
- 6.11.6.3 Set active volume 192
- 6.11.6.6 Format volume 193
- 6.11.7 Pending operations 194
- 7 Glossary 195
- Backup plan (Plan) 197
- Backup policy (Policy) 197
- Backup scheme 198
- Bootable agent 198
- Bootable media 198
- Built-in group 198
- Centralized backup plan 199
- Centralized management 199
- Centralized task 199
- Centralized vault 199
- Cleanup 199
- Disk backup (Image) 201
- Disk group 201
- Dynamic disk 202
- Dynamic group 202
- Dynamic volume 203
- Encrypted archive 203
- Encrypted vault 203
- Full backup 203
- Storage node-side validation 207
- Tower of Hanoi 207
- Windows Vista (PE 2.0) 209
- 8 Index 210
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