[ubuntu] Spindown HardDisks on Server

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http://ubuntuforums.org – Hi Everybody, I have a home server with Ubuntu 12.04 (desktop version, I sometimes do like GUIs), with Software Raid 5 configuration (3 disks). On these 3 disks I also have my OS. Question now is: How can I make my Harddisks go to idle ? First question is: How can I check if they spun down or not (preferably on a timeline) ? I believe the main reason why my disks never spin down are all these logs that are being stored, by the kernel and by other applications. Is this correct ? Is it possible to route all these log files to a USB flash drive, or somehow limit the logging to (Hardware)