Awsome thanks for the more specific udev rule. That's ideal since it
would apply to any FreeAgentDesktop, which obviously they all have the
same problem.

Also, by now I think I can say the sdparm fix works.

Without rebooting I did the disconnect/reconnect I mentioned, then
manually did the sdparm command on /dev/sdh, then did a full system
rsync backup of about 300 gigs from a software sata raid0 array to the
FreeAgent, which is formatted ext2. I've also done other massive backups
to the device like pumping the output of star right to the raw device
treating it like a tape. To me that as good as proves I don't have a
"lots of traffic" problem.

Then the drive has been untouched for several hours after that backup
completed and now I just tried and it's up & working fine. To me that
says I no longer have the "drive turns off" problem.

So now I will test the allow_restart possible fix to allow the drive to
spin down and spin up gracefully instead of just forcing it to stay
spinning all the time. That, with the better udev rule would be the
ideal. This enclosure is not one you can swap out drive or fan without
basically destroying it, so best to just let it go idle as much as
possible.

Thanks again.
bkw

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USB mass storage stops working after a while
https://bugs.launchpad.net/bugs/61235
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