doTestParallelReaders(1, 4)
	doTestParallelReaders(3, 4)
	doTestParallelReaders(4, 2)
}

// Borrowed from rwmutex_test.go
func reader(rwm *LRWMutex, numIterations int, activity *int32, cdone chan bool) {
	for i := 0; i < numIterations; i++ {
		if rwm.GetRLock(context.Background(), "", "", time.Second) {
			n := atomic.AddInt32(activity, 1)
			if n < 1 || n >= 10000 {

// If cycles is 0 false is always returned.
// If cycles is 1 true is always returned (as expected).
func (h dataUsageHash) mod(cycle uint32, cycles uint32) bool {
	if cycles <= 1 {
		return cycles == 1
	}
	return uint32(xxhash.Sum64String(string(h)))%cycles == cycle%cycles
}

// modAlt returns true if the hash mod cycles == cycle.
// This is out of sync with mod.

	o = msgp.AppendArrayHeader(o, uint32(len(z.QueuedBuckets)))
	for za0001 := range z.QueuedBuckets {
		o = msgp.AppendString(o, z.QueuedBuckets[za0001])
	}
	// string "HealedBuckets"
	o = append(o, 0xad, 0x48, 0x65, 0x61, 0x6c, 0x65, 0x64, 0x42, 0x75, 0x63, 0x6b, 0x65, 0x74, 0x73)
	o = msgp.AppendArrayHeader(o, uint32(len(z.HealedBuckets)))
	for za0002 := range z.HealedBuckets {

	}
	info.Used = info.Total - info.Free
	return info, nil
}

// GetDriveStats returns IO stats of the drive by its major:minor
func GetDriveStats(major, minor uint32) (iostats IOStats, err error) {
	return IOStats{}, errors.New("operation unsupported")

	objectEncryptionKey, err := decryptObjectMeta(key, bucket, object, metadata)
	if err != nil {
		return nil, err
	}
	return newDecryptReaderWithObjectKey(client, objectEncryptionKey, seqNumber)
}

func newDecryptReaderWithObjectKey(client io.Reader, objectEncryptionKey []byte, seqNumber uint32) (io.Reader, error) {

	}
	info.Used = info.Total - info.Free
	return info, nil
}

// GetDriveStats returns IO stats of the drive by its major:minor
func GetDriveStats(major, minor uint32) (iostats IOStats, err error) {
	return IOStats{}, errors.New("operation unsupported")

	o = msgp.AppendBool(o, z.NoMetadata)
	return
}

// UnmarshalMsg implements msgp.Unmarshaler
func (z *BucketOptions) UnmarshalMsg(bts []byte) (o []byte, err error) {
	var field []byte
	_ = field
	var zb0001 uint32
	zb0001, bts, err = msgp.ReadMapHeaderBytes(bts)
	if err != nil {
		err = msgp.WrapError(err)
		return
	}
	for zb0001 > 0 {
		zb0001--
		field, bts, err = msgp.ReadMapKeyZC(bts)
		if err != nil {

import (
	"github.com/tinylib/msgp/msgp"
)

// DecodeMsg implements msgp.Decodable
func (z *PartialOperation) DecodeMsg(dc *msgp.Reader) (err error) {
	var field []byte
	_ = field
	var zb0001 uint32
	zb0001, err = dc.ReadMapHeader()
	if err != nil {
		err = msgp.WrapError(err)
		return
	}
	for zb0001 > 0 {
		zb0001--
		field, err = dc.ReadMapKeyPtr()
		if err != nil {
			err = msgp.WrapError(err)

	}
	info.Used = info.Total - info.Free
	return info, nil
}

// GetDriveStats returns IO stats of the drive by its major:minor
func GetDriveStats(major, minor uint32) (iostats IOStats, err error) {
	return IOStats{}, errors.New("operation unsupported")

	for i := 0; i < p.dataBlocks; i++ {
		// Setup read triggers for p.dataBlocks number of reads so that it reads in parallel.
		readTriggerCh <- true
	}

	disksNotFound := int32(0)
	bitrotHeal := int32(0)       // Atomic bool flag.
	missingPartsHeal := int32(0) // Atomic bool flag.
	readerIndex := 0
	var wg sync.WaitGroup
	// if readTrigger is true, it implies next disk.ReadAt() should be tried