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System Administration Guide: Devices and File Systems Oracle Solaris 10 8/11 Information Library |
1. Managing Removable Media (Overview)
2. Managing Removable Media (Tasks)
3. Accessing Removable Media (Tasks)
4. Writing CDs and DVDs (Tasks)
5. Managing Devices (Overview/Tasks)
6. Dynamically Configuring Devices (Tasks)
7. Using USB Devices (Overview)
9. Using InfiniBand Devices (Overview/Tasks)
11. Administering Disks (Tasks)
12. SPARC: Setting Up Disks (Tasks)
13. x86: Setting Up Disks (Tasks)
14. Configuring Oracle Solaris iSCSI Targets and Initiators (Tasks)
15. The format Utility (Reference)
16. Managing File Systems (Overview)
17. Creating and Mounting File Systems (Tasks)
18. Using The CacheFS File System (Tasks)
19. Configuring Additional Swap Space (Tasks)
20. Checking UFS File System Consistency (Tasks)
21. UFS File System (Reference)
22. Backing Up and Restoring UFS File Systems (Overview)
Where to Find UFS Backup and Restore Tasks
Introduction to Backing Up and Restoring UFS File Systems
Why You Should Back Up File Systems
High-Level View of Backing Up and Restoring UFS File Systems (Task Map)
Considerations for Scheduling Backups
How Often Should You Do Backups?
Backup Interval Terms and Definitions
Guidelines for Scheduling Backups
Using Dump Levels to Create Incremental Backups
Example--Dump Levels for Daily, Cumulative Backups
Example--Dump Levels for Daily, Incremental Backups
Example--Daily Cumulative, Weekly Cumulative Backup Schedule
Tape Requirements for the Daily Cumulative, Weekly Cumulative Schedule
Example--Daily Cumulative, Weekly Incremental Backup Schedule
Tape Requirements for the Daily Cumulative, Weekly Incremental Backup Schedule
Example--Daily Incremental, Weekly Cumulative Backup Schedule
Tape Requirements for Daily Incremental, Weekly Cumulative Schedule
Example--Monthly Backup Schedule for a Server
23. Backing Up UFS Files and File Systems (Tasks)
24. Using UFS Snapshots (Tasks)
25. Restoring UFS Files and File Systems (Tasks)
26. UFS Backup and Restore Commands (Reference)
27. Copying Files and File Systems (Tasks)
Backing up file systems means copying file systems to removable media, such as tape, to safeguard against loss, damage, or corruption. Restoring file systems means copying reasonably current backup files from removable media to a working directory.
This chapter describes the ufsdump and ufsrestore commands for backing up and restoring UFS file systems. Other commands are available for copying files and file systems for the purpose of sharing or transporting files. The following table provides pointers to all commands that copy individual files and file systems to other media.
Table 22-1 Commands for Backing Up and Restoring Files and File Systems
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Backing up files is one of the most crucial system administration functions. You should perform regularly scheduled backups to prevent loss of data due to the following types of problems:
System crashes
Accidental deletion of files
Hardware failures
Natural disasters such as fire, hurricanes, or earthquakes
Problems when you reinstall or upgrade a system
You should back up all file systems that are critical to users, including file systems that change frequently. The following tables provide general guidelines on the file systems to back up for stand-alone systems and servers.
Table 22-2 File Systems to Back Up for Stand-alone Systems
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Table 22-3 UFS File Systems to Back Up for Servers
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You can perform full or incremental backups by using the ufsdump command. You can create a temporary image of a file system by using the fssnap command. The following table lists the differences between these types of backup procedures.
Table 22-4 Differences Between Types of Backups
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The following table shows typical tape devices that are used for storing file systems during the backup process. The storage capacity depends on the type of drive and the data being written to the tape. For more information on tape devices, see Chapter 28, Managing Tape Drives (Tasks).
Table 22-5 Typical Media for Backing Up File Systems
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