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On 06/11/2014 02:12 PM, Ralf wrote: |
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> Hi there, |
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> |
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> I'm using Gentoo ~amd64 on my NAS. |
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> |
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> This is my setup: |
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> Mainboard - Asus E35M1 |
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> CPU - AMD E350 |
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> HDD - 1x 500GiB WD Caviar Green WD5000AADS (root) |
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> HDD - 4x 3TiB WD Caviar Green WD30EZRX (Raid10) |
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> |
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> As these hard drives are desktop hard drives and not designed for 24/7 |
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> purposes, I want to spin them down when they are not in use. |
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> (And in fact, they will probably be idling most of the time, so let's |
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> save energy) |
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> |
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> I'm able to force spin down those drive by using hdparm -y. hdparm -C |
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> then tells me, that they switched from active/idle to standby. |
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> Setting standby-time using hdparm -S also seems to work fine: |
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> |
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> hdparm -S 10 /dev/sdb |
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> |
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> /dev/sdb: |
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> setting standby to 10 (50 seconds) |
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> |
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> But this does not standby my drive after 50 seconds. So I tried to set |
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> the Power Management Level: |
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> |
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> hdparm -B 5 /dev/sdb |
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> |
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> /dev/sdb: |
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> setting Advanced Power Management level to 0x05 (5) |
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> HDIO_DRIVE_CMD failed: Input/output error |
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> APM_level = not supported |
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> |
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> |
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> Obviously, my system does not support APM what I can hardly believe... |
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> So I tried to enable APM but my kernel configuration doesn't allow me |
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> to enable APM support as long as I use a 64 bit kernel - APM option is |
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> only available for 32 bit kernels. |
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> |
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> What am I doing wrong? My hardware is *relatively* new and I don't |
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> believe that it doesn't support those power management features. |
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> |
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> But besides that, does anyone have further tips or tricks to protect |
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> hard drives? E.g. try to minimize Load Cycle Count, ... |
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> |
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> Output of hdparm -I: http://pastebin.com/RyAU6u8T |
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> |
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> Cheers, |
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> Ralf |
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|
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50 seconds is very small timeout, be wary of spinup/spindown cycles |
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which imho are worse than always spinning. |
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|
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depending on what is accessing /dev/sdb you might find that it sleeps |
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then immediately is woken. lsof is your friend here. |
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this is how I do it (my time is ten mins) |
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|
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# /etc/conf.d/hdparm |
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# or, you can set hdparm options for all drives |
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all_args="-S120" |
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|
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|
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then.. |
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# /etc/init.d/hdparm start |
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