Contents
What is dump backup?
A dump backup writes file system data from disk to tape using a predefined process. You can back up a volume, a qtree, or a subtree that is neither an entire volume nor an entire qtree.
What is the purpose of dump utilities?
Dump examines files in a filesystem, determines which ones need to be backed up, and copies those files to a specified disk, tape or other storage medium. Subsequent incremental backups can then be layered on top of the full backup.
Which dump is done for files that have been modified since last full dump?
For NDMP backups, dump level zero is used for a full backup, and contains all files and directories beneath the backup path; dump level 1 is a cumulative incremental backup, and contains files and directories that have been modified since the last full backup; dump levels 2 to 9 are used only for differential …
Which command is used to restore the backup created by dump?
Compare the contents of the dump file with the files on the disk. This is used to check the success of a restore. Start the restore from a particular tape of a multitape backup. This is useful for restarting an interrupted restore….Recovering individual files.
| Command | Description |
|---|---|
| help | List the available commands. |
How does dump work in ext2 / 3 filesystem?
Dump examines files on an ext2/3 filesystem and determines which files need to be backed up. These files are copied to the given disk, tape or other storage medium for safe keeping (see the -f option below for doing remote backups).
Which is the output of files to dump?
By default, the same output file name is used for each volume after prompting the operator to change media. files-to-dump is either a mountpoint of a filesystem or a list of files and directories to be backed up as a subset of a filesystem.
How are multiple file names used in a dump?
Multiple file names may be given as a single argument separated by commas. Each file will be used for one dump volume in the order listed; if the dump requires more volumes than the number of names given, the last file name will used for all remaining volumes after prompting for media changes.
How to compare a number of file systems?
This list is incomplete; you can help by adding missing items with reliable sources. The following tables compare general and technical information for a number of file systems . ? ASCII except for < > . , ; : = ?