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docs: tape/restore: mention single snapshot restore

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what it is, how to use it and the caveats

Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
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Dominik Csapak 2022-05-13 15:39:38 +02:00 committed by Thomas Lamprecht
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commit fca84a4b94
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docs/tape-backup.rst
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@ -831,6 +831,29 @@ data disk (datastore):
# proxmox-tape restore 9da37a55-aac7-4deb-91c6-482b3b675f30 mystore
Single Snapshot Restore
^^^^^^^^^^^^^^^^^^^^^^^
Sometimes it is not necessary to restore a whole media-set, but only some
specific snapshots from the tape. This can be achieved with the ``snapshots``
parameter:
.. code-block:: console
// proxmox-tape restore <media-set-uuid> <datastore> [<snapshot>]
# proxmox-tape restore 9da37a55-aac7-4deb-91c6-482b3b675f30 mystore sourcestore:host/hostname/2022-01-01T00:01:00Z
This first restores the snapshot to a temporary location, then restores the relevant
chunk archives, and finally restores the snapshot data to the target datastore.
The ``snapshot`` parameter can be given multiple times, so one can restore
multiple snapshots with one restore action.
.. NOTE:: When using the single snapshot restore, the tape must be traversed
more than once, which, if you restore many snapshots at once, can take longer
than restoring the whole datastore.
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