diskInfoCache *cachevalue.Cache[DiskInfo]
	sync.RWMutex
	formatData []byte

	nrRequests   uint64
	major, minor uint32
	fsType       string

	immediatePurge       chan string
	immediatePurgeCancel context.CancelFunc

	// mutex to prevent concurrent read operations overloading walks.
	rotational bool
	walkMu     *sync.Mutex
	walkReadMu *sync.Mutex
}