return 1
	case "reduced":
		return 2
	case "optimal":
		return (driveCount + 1) / 2
	case "auto":
		return -1
	}
	// defaults to 'strict'
	return driveCount
}

func calcCommonWritesDeletes(infos []DiskInfo, readQuorum int) (commonWrite, commonDelete uint64) {
	deletes := make([]uint64, len(infos))
	writes := make([]uint64, len(infos))
	for index, di := range infos {

			}

			if disk := storageDisks[index]; disk != nil {
				if disk.IsLocal() {
					xldisk, ok := disk.(*xlStorageDiskIDCheck)
					if ok {
						_, commonDeletes := calcCommonWritesDeletes(currentDisksInfo[m], (s.setDriveCount+1)/2)
						xldisk.totalDeletes.Store(commonDeletes)
						xldisk.storage.setDeleteAttribute(commonDeletes)

						if globalDriveMonitoring {