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Bug#419175: linux-image-2.6.18-4-686: USB HD gives I/O errors while spinning up

Agree - both methods work (getting udev to set allow_restart) and by turning-off standby with sdparm:

  % sdparm --clear STANDBY -6 /dev/sda

The big question for me .. how does one re-enable STANDBY mode on this drive? sdparm fails to switch it back on, and even power cycles haven't reenabled it.

Meanwhile, I wonder if the linux kernel shouldn't look at the power mode page when it installs a new SCSI disk drive and make a note that the drive might need spinning up if it has STANDBY enabled (or any other automated power saving modes). This would work for all devices, without extra hacking.

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