return cfg, fmt.Errorf("unknown value: '%s'", idleSpeed)
	}

	// Stick to loading deprecated config/env if they are already set, and the Speed value
	// has not been changed from its "default" value, if it has been changed honor new settings.
	if kvs.GetWithDefault(Speed, DefaultKVS) == "default" {
		if kvs.Get(Delay) != "" && kvs.Get(MaxWait) != "" {
			if err = lookupDeprecatedScannerConfig(kvs, &cfg); err != nil {
				return cfg, err
			}

**In our tests we also found ext4 does not honor POSIX O_DIRECT/Fdatasync semantics, ext4 trades performance for consistency guarantees. Please avoid ext4 in your setup.**

		if atomic.LoadUint32(&srv.inShutdown) != 0 {
			// To indicate disable keep-alive, server is shutting down.
			w.Header().Set("Connection", "close")

			// Add 1 minute retry header, incase-client wants to honor it
			w.Header().Set(RetryAfter, "60")

			w.WriteHeader(http.StatusServiceUnavailable)
			w.Write([]byte(http.ErrServerClosed.Error()))
			return
		}

		atomic.AddInt32(&srv.requestCount, 1)

	disks := er.getDisks()
	// Assume (N/2 + 1) quorum for Delete()
	// this is a theoretical assumption such that
	// for delete's we do not need to honor storage
	// class for objects that have reduced quorum
	// due to storage class - this only needs to be honored
	// for Read() requests alone that we already do.
	writeQuorum := len(disks)/2 + 1

	// The reason to duplicate this structure here is to verify if the
	// unmarshalling works from a client perspective, specifically
	// while unmarshalling time.Time type for 'Initiated' field.
	// time.Time does not honor xml marshaller, it means that we need
	// to encode/format it before giving it to xml marshaling.

	// This below check adds client side verification to see if its
	// truly parsable.

		}
		// Only if custom erasure drive count is set, verify if the
		// set_drive_count was manually set - we need to honor what is
		// present on the drives.
		if globalCustomErasureDriveCount && len(formatErasure.Erasure.Sets[0]) != setDriveCount {

		if legacyPreserved {
			if contextCanceled(ctx) {
				return res, ctx.Err()
			}

			if len(legacyEntries) > 0 {
				// legacy data dir means its old content, honor system umask.
				if err = mkdirAll(legacyDataPath, 0o777, dstVolumeDir); err != nil {
					// any failed mkdir-calls delete them.
					s.deleteFile(dstVolumeDir, legacyDataPath, true, false)