Data Backup 12-1

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Data backup means copying data from disk to tape. While the filer dump command
enables you to copy data to standard output, this chapter mainly discusses how to
copy data to tape.
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The following list describes the reasons for backing up data from disk to tape:
You can restore data from tape if an application or a user inadvertently corrupts or
deletes files that cannot be recovered from snapshots.
You can store the backup tapes at an off-site archive to protect the data against
natural disasters.
After you reinstall the file system on the filer (for example, for migrating to larger
disks or for converting a single-volume filer to a multivolume filer), you can
restore data from tape.
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The filer supports the dump command backup method.
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