var wg sync.WaitGroup
	for i, pool := range z.serverPools {
		wg.Add(1)
		go func(i int, pool *erasureSets, opts ObjectOptions) {
			defer wg.Done()
			// remember the pool index, we may sort the slice original index might be lost.
			pinfo := PoolObjInfo{
				Index: i,
			}
			// do not remove this check as it can lead to inconsistencies
			// for all callers of bucket replication.
			if !opts.MetadataChg {