spin-up: 384W
idle: 173W
munin-update: 211W
bonnie++ writing: 216W peak, 200W average
bonnie++ reading: 227W peak, 206W average
bonnie++ start'em: 203W

A quick analysis compared to my 12x1TB box: 20W more peak usage at boot, similar idle usage, and 20W lower usage with drive access. No doubt the LP drives are frugal, considering these numbers are with 4 more drives, and swraid.

Will post average power usage numbers in a couple of weeks.

The one drive thats putting on reallocated sectors is now up to 77, after 3460 hours runtime

my Corasir HX620W worked for 2 and a half years and had almost no dust at all. to achive that, I just used some custom (home) made air filters in front of fans and sealed all other holes.
filters were similar to this (this is a new case):



this way filter can be vacuum-cleaned or even replaced without need to power-off server.