PercentFreeGoal float64            `msg:"pf"`     // Computed from total free space and capacity at the start of rebalance
	PoolStats       []*rebalanceStats  `msg:"rss"`    // Per-pool rebalance stats keyed by pool index
}

var errRebalanceNotStarted = errors.New("rebalance not started")

func (z *erasureServerPools) loadRebalanceMeta(ctx context.Context) error {