writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, errInvalidArgument), r.URL)
				return
			}
		}
		var pool *erasureSets
		for pidx := range z.serverPools {
			if pidx == idx {
				pool = z.serverPools[idx]
				break
			}
		}
		if pool == nil {
			// We didn't find any matching pools, invalid input
			writeErrorResponseJSON(ctx, w, toAdminAPIErr(ctx, errInvalidArgument), r.URL)