xubuntu crash while writing to USB 2.0 HDD

 Call Trace:
  [<c1079a8f>] ? __wake_up+0x3f/0x50
  [<c123829d>] ? jbd2_journal_stop+0x25d/0x380
  [<c10451d8>] ? default_spin_lock_flags+0x8/0x10
  [<c1629ca3>] schedule+0x23/0x60
  [<c1135ebd>] kmap_high+0xed/0x1f0
  [<c107ed20>] ? wake_up_state+0x20/0x20
  [<c104c08f>] kmap+0x5f/0x70
  [<c1171603>] generic_pipe_buf_map+0x13/0x30
  [<c11903fe>] write_pipe_buf+0x2e/0x70
  [<c11f4731>] ? ext4_dirty_inode+0x51/0x60
  [<c11903d0>] ? generic_file_splice_write+0x150/0x150
  [<c118fdc0>] splice_from_pipe_feed+0x70/0x100
  [<c11903d0>] ? generic_file_splice_write+0x150/0x150
  [<c11903d0>] ? generic_file_splice_write+0x150/0x150
  [<c11900d3>] __splice_from_pipe+0x53/0x80
  [<c1628300>] ? mutex_lock+0x10/0x28
  [<c1191acc>] splice_from_pipe+0x4c/0x60
  [<c1191b3c>] default_file_splice_write+0x2c/0x50
  [<c11903d0>] ? generic_file_splice_write+0x150/0x150
  [<c1191b10>] ? generic_splice_sendpage+0x30/0x30
  [<c1191f25>] SyS_splice+0x195/0x580
  [<c1632ccd>] sysenter_do_call+0x12/0x28
 INFO: task pool:2158 blocked for more than 120 seconds.
 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.