How to prevent HDD spin-down.

[freebsd at fongaboo.com]

You didn't mention the line of WD drive, but I was offered this solution 
when trying to use a Caviar Green in my FreeNAS:

https://forums.freenas.org/index.php?threads/hacking-wd-greens-and-reds-with-wdidle3-exe.18171/

https://youtu.be/J2eYyRI_F98


I haven't tried it myself yet but I wonder if it would apply to your 
situation. Unfortunately it's not a BSD-based solution and would require 
you to remove the drive and connect it directly to a DOS/Windows machine.

I've also told that it needs to be a direct bus connection, and using 
things like a USB-to-ATA adapter would prevent the S.M.A.R.T. commands 
from being sent to the firmware of the drive.


On Tue, 6 Mar 2018, J.B. wrote:

> On 03/06/2018 04:00 AM, freebsd-questions-request at freebsd.org wrote:
>> Re: How to prevent HDD spin-down.
>
> Thank you to everyone for your helpful tips and suggestions. You make FreeBSD 
> great. :)
>
> I tried the camcontrol suggestion first since it didn't require installing 
> anything, but it didn't seem to work. Tried sysutils/ataidle next since it 
> allows keeping spindown but with a reasonable timeout, and it seems to have 
> worked perfectly: ataidle -P 127 /dev/ada0.
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