func parseChunkSignature(chunk []byte) []byte {
	chunkSplits := bytes.SplitN(chunk, []byte(s3ChunkSignatureStr), 2)
	return chunkSplits[1]
}

// parse hex to uint64.
func parseHexUint(v []byte) (n uint64, err error) {
	for i, b := range v {
		switch {
		case '0' <= b && b <= '9':
			b -= '0'
		case 'a' <= b && b <= 'f':
			b = b - 'a' + 10
		case 'A' <= b && b <= 'F':

pkg compress/lzw, method (*Reader) Close() error
pkg compress/lzw, method (*Reader) Read([]uint8) (int, error)
pkg compress/lzw, method (*Reader) Reset(io.Reader, Order, int)
pkg compress/lzw, method (*Writer) Close() error
pkg compress/lzw, method (*Writer) Reset(io.Writer, Order, int)
pkg compress/lzw, method (*Writer) Write([]uint8) (int, error)
pkg compress/lzw, type Reader struct
pkg compress/lzw, type Writer struct

				Index:      []uint8(nil),
				Checksums:  map[string]string(nil),
			},
		},
		Erasure: ErasureInfo{
			Algorithm:    "ReedSolomon",
			DataBlocks:   6,
			ParityBlocks: 6,
			BlockSize:    1048576,
			Index:        1,
			Distribution: []int{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12},
			Checksums:    []ChecksumInfo{{PartNumber: 1, Algorithm: 0x3, Hash: []uint8{}}},
		},
		NumVersions: 1,

	// Non-X0 for Yxr0 should produce an error
	BLENDVPD X1, (BX), X2           // ERROR "invalid instruction"
	// Check offset overflow. Must fit in int32.
	MOVQ 2147483647+1(AX), AX       // ERROR "offset too large"
	MOVQ 3395469782(R10), R8        // ERROR "offset too large"
	LEAQ 3395469782(AX), AX         // ERROR "offset too large"

* [Federation][kubefed]: Use StorageClassName for etcd pvc ([#46323](https://github.com/kubernetes/kubernetes/pull/46323), [@marun](https://github.com/marun))
* Restrict active deadline seconds max allowed value to be maximum uint32 ([#46640](https://github.com/kubernetes/kubernetes/pull/46640), [@derekwaynecarr](https://github.com/derekwaynecarr))

		})

		var (
			clusterSize               uint64
			clusterBuckets            uint64
			clusterObjectsCount       uint64
			clusterVersionsCount      uint64
			clusterDeleteMarkersCount uint64
		)

		clusterObjectSizesHistogram := map[string]uint64{}
		clusterVersionsHistogram := map[string]uint64{}
		for _, usage := range dataUsageInfo.BucketsUsage {
			clusterBuckets++

		{"", "", true},
		{"-1", "0", true},
		{"-1", "900", true},
		{"1574812326", "900", false},
		{1574812326, "900", false},
		{int64(1574812326), "900", false},
		{int(1574812326), "900", false},
		{uint(1574812326), "900", false},
		{uint64(1574812326), "900", false},
		{json.Number("1574812326"), "900", false},
		{1574812326.000, "900", false},
		{time.Duration(3) * time.Minute, "900", false},
	}

	for _, testCase := range testCases {

		if _, ok := err.(BackendDown); ok {
			return err
		}
		return tierPermErr{
			Op:  tierDelete,
			Err: err,
		}
	}
	return err
}

type tierOp uint8

const (
	_ tierOp = iota
	tierGet
	tierPut
	tierDelete
)

func (op tierOp) String() string {
	switch op {
	case tierGet:
		return "GET"
	case tierPut:
		return "PUT"

	}

	// Read header
	switch format := binary.LittleEndian.Uint16(data[0:2]); format {
	case tierConfigFormat:
	default:
		return nil, fmt.Errorf("tierConfigInit: unknown format: %d", format)
	}

	cfg := NewTierConfigMgr()
	switch version := binary.LittleEndian.Uint16(data[2:4]); version {
	case tierConfigV1, tierConfigVersion:

			continue
		}

		var dm madmin.DiskMetric
		dm.NDisks = 1
		if d.Healing {
			dm.Healing++
		}
		if d.Metrics != nil {
			dm.LifeTimeOps = make(map[string]uint64, len(d.Metrics.APICalls))
			for k, v := range d.Metrics.APICalls {
				if v != 0 {
					dm.LifeTimeOps[k] = v
				}
			}
			dm.LastMinute.Operations = make(map[string]madmin.TimedAction, len(d.Metrics.APICalls))