func (x xlMetaV2) listFreeVersions(volume, path string) ([]FileInfo, error) {
	fivs, err := x.ListVersions(volume, path, true)
	if err != nil {
		return nil, err
	}
	n := 0
	for _, fiv := range fivs {
		if fiv.TierFreeVersion() {
			fivs[n] = fiv
			n++
		}
	}
	fivs = fivs[:n]
	return fivs, nil
}

func TestFreeVersion(t *testing.T) {
	fatalErr := func(err error) {
		t.Helper()
		if err != nil {
			t.Fatal(err)

func (fi *FileInfo) SkipTierFreeVersion() bool {
	_, ok := fi.Metadata[ReservedMetadataPrefixLower+tierSkipFVID]
	return ok
}

// TierFreeVersion returns true if version is a free-version.
func (fi *FileInfo) TierFreeVersion() bool {
	_, ok := fi.Metadata[ReservedMetadataPrefixLower+tierFVMarker]
	return ok
}

// IsRestoreObjReq returns true if fi corresponds to a RestoreObject request.

	fivs, err := getAllFileInfoVersions(xlMetaBuf, volume, path, allParts)
	if err != nil {
		return fivs, err
	}
	n := 0
	for _, fi := range fivs.Versions {
		// Filter our tier object delete marker
		if !fi.TierFreeVersion() {
			fivs.Versions[n] = fi
			n++
		} else {
			fivs.FreeVersions = append(fivs.FreeVersions, fi)
		}
	}
	fivs.Versions = fivs.Versions[:n]
	// Update numversions
	for i := range fivs.Versions {

	inlineData := fi.InlineData()

	fi.Metadata = srcInfo.UserDefined
	srcInfo.UserDefined["etag"] = srcInfo.ETag

	freeVersionID := fi.TierFreeVersionID()
	freeVersionMarker := fi.TierFreeVersion()

	// Update `xl.meta` content on each disks.
	for index := range metaArr {
		if metaArr[index].IsValid() {
			metaArr[index].ModTime = modTime
			metaArr[index].VersionID = versionID