AdbHelper.setDevice(mChannel, mDevice);
byte[] request = AdbHelper.formAdbRequest("sync:"); // $NON-NLS-1$
AdbHelper.write(mChannel, request, -1, DdmPreferences.getTimeOut());
AdbResponse resp = AdbHelper.readAdbResponse(mChannel, false /* readDiagString */);
if (resp.okay == false) {
Log.w("ddms", "Got unhappy response from ADB sync req: " + resp.message);
mChannel.close();
mChannel = null;