How can you ensure data resiliency reputation?
There are two components of this. First it is costly to change miner identity rapidly because miners commit to an identity by staking FIL. Second faults are verifiable. It is clear to all clients which miner identities have lost data because they cannot submit proofs for it.
It is in a miner’s best interest to build up a record of good service to attract client deals. Clients can audit miners by examining the chain to verify that they have demonstrated the record of service they claim.