In the Volume tab you manage storage volumes on the Zimbra Mailbox server. When VMware Zimbra Collaboration Server is installed, one index volume and one message volume are configured on each mailbox server. You can add new volumes, set the volume type, and set the compression threshold.
Each Zimbra mailbox server is configured with one current index volume. Each mailbox is assigned to a permanent directory on the current index volume. You cannot change which volume the account is assigned.
As volumes become full, you can create a new current index volume for new accounts. When a new current volume is added, the older index volume is no longer assigned new accounts.
Index volumes not marked current are still actively in use as the index volumes for accounts assigned to them. Any index volume that is referenced by a mailbox as its index volume cannot be deleted.
When a new message is delivered or created, the message is saved in the current message volume. Additional message volumes can be created, but only one is configured as the current volume where new messages are stored. When the volume is full, you can configure a new current message volume. The current message volume receives all new messages. New messages are never stored in the previous volume.
