// It will attempt to read it from env variable and fall back to drives/2.
func ecDrivesNoConfig(setDriveCount int) (int, error) {
	sc, err := storageclass.LookupConfig(config.KVS{}, setDriveCount)
	if err != nil {
		return 0, err
	}
	return sc.GetParityForSC(storageclass.STANDARD), nil
}

// Initialize a new set of set formats which will be written to all disks.