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|Five key questions about dump (continued)|
A file is moved in the filesystem. Again, there are a few scenarios:
has assumed this file's old inode).
If we dump an active filesystem, will data corruption affect directories?
Most of the details outlined for files also apply to directories. The one exception is that directories are dumped in Pass III instead of Pass IV, so the time frames for changes to directories will change.
This also implies that changes to directories are less susceptible to corruption because the time that elapses between the generation of the directory list and the dump of that list is less. However, changes to files that would normally cause corresponding changes to the directory information will still create inconsistencies in the dump.
If we dump an active filesystem, will data corruption affect the entire dump or everything beyond a certain point in the dump?
Even though dump backs up files through the raw device driver, it is in effect backing up data inode by inode. This is still going through the filesystem and doing it file by file. Corrupting one file will not affect other files in the dump.
This was first published in August 2007