func reliableRemoveAll(dirPath string) (err error) {
	i := 0
	for {
		// Removes all the directories and files.
		if err = RemoveAll(dirPath); err != nil {
			// Retry only for the first retryable error.
			if isSysErrNotEmpty(err) && i == 0 {
				i++
				continue
			}
		}
		break
	}
	return err
}

// Wrapper functions to os.MkdirAll, which calls reliableMkdirAll

			}
			if err = Remove(dstFilePath); err != nil {
				if isSysErrNotEmpty(err) || isSysErrNotDir(err) {
					return errFileAccessDenied
				} else if isSysErrIO(err) {
					return errFaultyDisk
				}
				return err
			}
		}
	}

	if err = renameAll(srcFilePath, dstFilePath, dstVolumeDir); err != nil {
		if isSysErrNotEmpty(err) || isSysErrNotDir(err) {
			return errFileAccessDenied
		}