// Bucket to scanner
	Bucket string

	// Directory inside the bucket.
	BaseDir string

	// Do a full recursive scan.
	Recursive bool

	// ReportNotFound will return errFileNotFound if all disks reports the BaseDir cannot be found.
	ReportNotFound bool

	// FilterPrefix will only return results with given prefix within folder.
	// Should never contain a slash.
	FilterPrefix string

				werr = d.WalkDir(ctx, WalkDirOptions{
					Limit:          opts.perDiskLimit,
					Bucket:         opts.bucket,
					BaseDir:        opts.path,
					Recursive:      opts.recursive,
					ReportNotFound: opts.reportNotFound,
					FilterPrefix:   opts.filterPrefix,
					ForwardTo:      opts.forwardTo,
				}, w)
			}

			// fallback only when set.
			for {
				fd := fallback(werr)
				if fd == nil {

			disks:          disks,
			fallbackDisks:  fallbackDisks,
			bucket:         bucket,
			recursive:      true,
			forwardTo:      forwardTo,
			minDisks:       1,
			reportNotFound: false,
			agreed: func(entry metaCacheEntry) {
				jt.Take()
				go healEntry(bucket, entry)
			},
			partial: func(entries metaCacheEntries, _ []error) {
				entry, ok := entries.resolve(&resolver)

	}

	err := listPathRaw(ctx, listPathRawOptions{
		disks:          disks,
		bucket:         bucketName,
		recursive:      true,
		forwardTo:      "",
		minDisks:       listingQuorum,
		reportNotFound: false,
		agreed:         fn,
		partial: func(entries metaCacheEntries, _ []error) {
			entry, ok := entries.resolve(&resolver)
			if ok {
				fn(*entry)
			}
		},
		finished: nil,
	})

		disks:          disks,
		fallbackDisks:  fallbackDisks,
		bucket:         bucket,
		path:           path,
		filterPrefix:   filterPrefix,
		recursive:      true,
		forwardTo:      "",
		minDisks:       1,
		reportNotFound: false,
		agreed: func(entry metaCacheEntry) {
			if err := healEntry(bucket, entry, scanMode); err != nil {
				cancel()
			}
		},
		partial: func(entries metaCacheEntries, _ []error) {

	err := listPathRaw(ctx, listPathRawOptions{
		disks:          disks,
		bucket:         bi.Name,
		path:           bi.Prefix,
		recursive:      true,
		forwardTo:      "",
		minDisks:       listingQuorum,
		reportNotFound: false,
		agreed:         fn,
		partial: func(entries metaCacheEntries, _ []error) {
			entry, ok := entries.resolve(&resolver)
			if ok {
				fn(*entry)
			}
		},
		finished: nil,
	})

			ctx, cancel := context.WithCancel(ctx)

			err := listPathRaw(ctx, listPathRawOptions{
				disks:          f.disks,
				bucket:         bucket,
				path:           prefix,
				recursive:      true,
				reportNotFound: true,
				minDisks:       f.disksQuorum,
				agreed: func(entry metaCacheEntry) {
					f.updateCurrentPath(entry.name)
					if f.dataUsageScannerDebug {

					path:           path,
					filterPrefix:   filterPrefix,
					recursive:      true,
					forwardTo:      opts.Marker,
					perDiskLimit:   opts.Limit,
					minDisks:       listingQuorum,
					reportNotFound: false,
					agreed:         send,
					partial: func(entries metaCacheEntries, _ []error) {
						entry, ok := entries.resolve(&resolver)
						if ok {
							send(*entry)
						}
					},