Currently, persistent storage blocks are limited to a 2tb maximum size and a single persistent storage unit can only be attached to one virtual instance at a time.
目前，持久性存储块的容量最大被限定在2tb，而且一次只能将一个持久性存储单元附加给一个虚拟实例。
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To minimize the time that it takes to recover an individual database, configure storage limits for the mailbox and public folder stores to constrain databases to a maximum size limit.