// Test 2: Not synchronized modtime
	erasureDisks = s.getDisks()
	partsMetadataBackup := partsMetadata[0]
	partsMetadata[0].ModTime = partsMetadata[0].ModTime.Add(-1 * time.Hour)

	errs = make([]error, len(erasureDisks))
	_, _ = checkObjectWithAllParts(ctx, erasureDisks, partsMetadata,
		errs, fi, false, bucket, object, madmin.HealDeepScan)

	for diskIndex, disk := range erasureDisks {
		if diskIndex == 0 && disk != nil {

		for i := 0; i <= f; i++ {
			diskErrors[i] = nil
		}
		erasureDisks := xl.getDisks()
		for i := range erasureDisks[:9] {
			switch diskType := erasureDisks[i].(type) {
			case *naughtyDisk:
				erasureDisks[i] = newNaughtyDisk(diskType.disk, diskErrors, errFaultyDisk)
			default:
				erasureDisks[i] = newNaughtyDisk(erasureDisks[i], diskErrors, errFaultyDisk)
			}
		}
		z.serverPools[0].erasureDisksMu.Lock()

	// Test 1: Remove the object backend files from the first disk.
	z := objLayer.(*erasureServerPools)
	er := z.serverPools[0].sets[0]
	erasureDisks := er.getDisks()
	firstDisk := erasureDisks[0]
	secondDisk := erasureDisks[1]

	fileInfos, errs := readAllFileInfo(ctx, erasureDisks, "", bucket, object, "", false, true)
	fi, err := getLatestFileInfo(ctx, fileInfos, er.defaultParityCount, errs)
	if err != nil {

// current design.
type erasureSets struct {
	sets []*erasureObjects

	// Reference format.
	format *formatErasureV3

	// erasureDisks mutex to lock erasureDisks.
	erasureDisksMu sync.RWMutex

	// Re-ordered list of disks per set.
	erasureDisks [][]StorageAPI

	// Distributed locker clients.
	erasureLockers setsDsyncLockers

	// Distributed lock owner (constant per running instance).

	// Now check if we actually wrote to backend (regardless of the response
	// returned by the server).
	z := obj.(*erasureServerPools)
	xl := z.serverPools[0].sets[0]
	erasureDisks := xl.getDisks()
	parts, errs := readAllFileInfo(ctx, erasureDisks, "", bucketName, objectName, "", false, false)
	for i := range parts {
		if errs[i] == nil {
			if parts[i].Name == objectName {

	// Now check if we actually wrote to backend (regardless of the response
	// returned by the server).
	z := obj.(*erasureServerPools)
	xl := z.serverPools[0].sets[0]
	erasureDisks := xl.getDisks()
	parts, errs := readAllFileInfo(ctx, erasureDisks, "", bucketName, objectName+"/upload.txt", "", false, false)
	for i := range parts {
		if errs[i] == nil {
			if parts[i].Name == objectName+"/upload.txt" {