問題文
The retention set on an isolated copy is defined separately from the retention of the primary backups. A team asks what the separation gives them, since both are set by the same organization. What is the reason for keeping them apart?
選択肢
- A change which shortens the primary retention triggers a transfer to the isolated copy, so the isolated copy grows by the amount the change would have deleted.
- A change that shortens the primary retention reaches the primary copies alone, so the isolated copy keeps the history that the change would otherwise have removed.
- A change that shortens the primary retention is blocked until the isolated copy is updated, so the isolated copy sets the pace at which the primary changes.
- A change that shortens the primary retention is applied to both copies at once, so the isolated copy holds the same history and confirms the change was intended.