/**
* Get the cause of an I/O exception if caused by a possible disk error
*
* @param ioe an I/O exception
* @return cause if the I/O exception is caused by a possible disk error; null otherwise.
*/
static IOException getCauseIfDiskError(IOException ioe) {
if (ioe.getMessage() != null && ioe.getMessage().startsWith(DISK_ERROR)) {
return (IOException) ioe.getCause();
} else {
return null;
}
}
