1. A method for use in a distributed storage unit, the method comprising: storing a received encoded data slice in a memory associated with a distributed storage unit, the received encoded data slice having a slice name and a revision number; starting a rollback timer indicating a period of time to wait for a commit command; in response to receiving a commit command before expiration of the period of time, making the received encoded data slice available for access; and in response to failing to receive a commit command before expiration of the period of time, making a previously stored revision of the received encoded data slice available for access.