errs: []error{
				nil, nil, nil, nil, nil, nil, nil, nil,
				nil, nil, nil, nil, nil, nil, nil, nil,
			},
			_tamperBackend: noTamper,
		},
		{
			modTimes:     modTimesThreeNone,
			expectedTime: threeNanoSecs,
			errs: []error{
				// Disks that have a valid xl.meta.
				nil, nil, nil, nil, nil, nil, nil, nil,
				nil, nil, nil, nil, nil,
				// Some disks can't access xl.meta.

	err = en.Append(0xa1, 0x6d)
	if err != nil {
		return
	}
	err = en.WriteInt(z.ScanMode)
	if err != nil {
		err = msgp.WrapError(err, "ScanMode")
		return
	}
	// write "c"
	err = en.Append(0xa1, 0x63)
	if err != nil {
		return
	}
	if z.Cache == nil {
		err = en.WriteNil()
		if err != nil {
			return
		}
	} else {
		err = z.Cache.EncodeMsg(en)
		if err != nil {
			err = msgp.WrapError(err, "Cache")

	// write "v"
	err = en.Append(0xa1, 0x76)
	if err != nil {
		return
	}
	err = en.WriteString(z.Volume)
	if err != nil {
		err = msgp.WrapError(err, "Volume")
		return
	}
	// write "fp"
	err = en.Append(0xa2, 0x66, 0x70)
	if err != nil {
		return
	}
	err = en.WriteString(z.FilePath)
	if err != nil {
		err = msgp.WrapError(err, "FilePath")
		return
	}
	// write "fi"

	if err != nil {
		return
	}
	err = en.WriteString(z.AccessKey)
	if err != nil {
		err = msgp.WrapError(err, "AccessKey")
		return
	}
	// write "SecretKey"
	err = en.Append(0xa9, 0x53, 0x65, 0x63, 0x72, 0x65, 0x74, 0x4b, 0x65, 0x79)
	if err != nil {
		return
	}
	err = en.WriteString(z.SecretKey)
	if err != nil {
		err = msgp.WrapError(err, "SecretKey")
		return
	}

	// write "Curr"
	err = en.Append(0x83, 0xa4, 0x43, 0x75, 0x72, 0x72)
	if err != nil {
		return
	}
	err = en.WriteInt(z.Curr)
	if err != nil {
		err = msgp.WrapError(err, "Curr")
		return
	}
	// write "Avg"
	err = en.Append(0xa3, 0x41, 0x76, 0x67)
	if err != nil {
		return
	}
	err = en.WriteFloat32(z.Avg)
	if err != nil {
		err = msgp.WrapError(err, "Avg")
		return
	}
	// write "Max"

	if err != nil {
		err = msgp.WrapError(err, "StoppedAt")
		return
	}
	// write "id"
	err = en.Append(0xa2, 0x69, 0x64)
	if err != nil {
		return
	}
	err = en.WriteString(z.ID)
	if err != nil {
		err = msgp.WrapError(err, "ID")
		return
	}
	// write "pf"
	err = en.Append(0xa2, 0x70, 0x66)
	if err != nil {
		return
	}
	err = en.WriteFloat64(z.PercentFreeGoal)
	if err != nil {

					z.KeyRotate = new(BatchJobKeyRotateV1)
				}
				err = z.KeyRotate.DecodeMsg(dc)
				if err != nil {
					err = msgp.WrapError(err, "KeyRotate")
					return
				}
			}
		case "Expire":
			if dc.IsNil() {
				err = dc.ReadNil()
				if err != nil {
					err = msgp.WrapError(err, "Expire")
					return
				}
				z.Expire = nil
			} else {
				if z.Expire == nil {

	_, err := startProfiler("")
	if err == nil {
		t.Fatal("Expected a non nil error, but nil error returned for invalid profiler.")
	}
}

// checkURL - checks if passed address correspond
func checkURL(urlStr string) (*url.URL, error) {
	if urlStr == "" {
		return nil, errors.New("Address cannot be empty")
	}
	u, err := url.Parse(urlStr)
	if err != nil {
		return nil, fmt.Errorf("`%s` invalid: %s", urlStr, err.Error())

	// write "Type"
	err = en.Append(0x83, 0xa4, 0x54, 0x79, 0x70, 0x65)
	if err != nil {
		return
	}
	err = en.WriteString(string(z.Type))
	if err != nil {
		err = msgp.WrapError(err, "Type")
		return
	}
	// write "Key"
	err = en.Append(0xa3, 0x4b, 0x65, 0x79)
	if err != nil {
		return
	}
	err = en.WriteString(z.Key)
	if err != nil {
		err = msgp.WrapError(err, "Key")
		return
	}
	// write "Context"

		err = msgp.WrapError(err, "Tiers")
		return
	}
	for za0001, za0002 := range z.Tiers {
		err = en.WriteString(za0001)
		if err != nil {
			err = msgp.WrapError(err, "Tiers")
			return
		}
		// map header, size 3
		// write "ts"
		err = en.Append(0x83, 0xa2, 0x74, 0x73)
		if err != nil {
			return
		}
		err = en.WriteUint64(za0002.TotalSize)
		if err != nil {