Hope that I did what is expected. Those are the results: sudo hdparm -C /dev/sdb1: /dev/sdb1: drive state is: unknown
sudo hdparm -B 255 /dev/sdb1: (execute after HDD wake up since previous command show result together with wake up process) /dev/sdb1: setting Advanced Power Management level to disabled HDIO_DRIVE_CMD failed: Invalid argument APM_level = off ** Changed in: linux (Ubuntu) Status: Incomplete => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1222313 Title: 0bc2:2300 [HP Pavillion dm3-1109TU] External HDD goes into low power mode delaying saving by 10-20 seconds To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1222313/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs