if opts.CheckPrecondFn != nil {
		// Lock the object before reading.
		lk := er.NewNSLock(bucket, object)
		lkctx, err := lk.GetRLock(ctx, globalOperationTimeout)
		if err != nil {
			return nil, err
		}
		rctx := lkctx.Context()
		obj, err := er.getObjectInfo(rctx, bucket, object, opts)
		lk.RUnlock(lkctx)
		if err != nil && !isErrVersionNotFound(err) && !isErrObjectNotFound(err) {
			return nil, err

	if !srcInfo.metadataOnly {
		return oi, NotImplemented{}
	}

	if !dstOpts.NoLock {
		lk := er.NewNSLock(dstBucket, dstObject)
		lkctx, err := lk.GetLock(ctx, globalOperationTimeout)
		if err != nil {
			return oi, err
		}
		ctx = lkctx.Context()
		defer lk.Unlock(lkctx)
	}
	// Read metadata associated with the object from all disks.
	storageDisks := er.getDisks()

		Object:    object,
		VersionID: versionID,
		DiskCount: len(storageDisks),
	}

	if !opts.NoLock {
		lk := er.NewNSLock(bucket, object)
		lkctx, err := lk.GetLock(ctx, globalOperationTimeout)
		if err != nil {
			return result, err
		}
		ctx = lkctx.Context()
		defer lk.Unlock(lkctx)
	}

	// Re-read when we have lock...

		}

		if !opts.NoLock {
			// Lock the bucket name before creating.
			lk := z.NewNSLock(minioMetaTmpBucket, bucket+".lck")
			lkctx, err := lk.GetLock(ctx, globalOperationTimeout)
			if err != nil {
				return err
			}

			ctx = lkctx.Context()
			defer lk.Unlock(lkctx)
		}
	}

	if err := z.s3Peer.MakeBucket(ctx, bucket, opts); err != nil {

		})
		return
	}

	// Lock the object name before starting replication operation.
	// Use separate lock that doesn't collide with regular objects.
	lk := objectAPI.NewNSLock(bucket, "/[replicate]/"+dobj.ObjectName)
	lkctx, err := lk.GetLock(ctx, globalOperationTimeout)
	if err != nil {
		globalReplicationPool.queueMRFSave(dobj.ToMRFEntry())
		sendEvent(eventArgs{
			BucketName: bucket,
			Object: ObjectInfo{

			erasureLockers[endpoint.Host] = newLockAPI(endpoint)
		}
	}

	var wg sync.WaitGroup
	var lk sync.Mutex
	for i := 0; i < setCount; i++ {
		lockerEpSet := set.NewStringSet()
		for j := 0; j < setDriveCount; j++ {
			wg.Add(1)
			go func(i int, endpoint Endpoint) {
				defer wg.Done()

				lk.Lock()
				// Only add lockers only one per endpoint and per erasure set.

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