Does anyone know if it's standard practice for motherboards to put SATA hard drives in standby or sleep mode when they are shut down?
I would like to leave the drives in a system I'm designing permanently powered, but this will only work if they are shut down with the motherboard.
I couldn't find anything useful with Google searches and I haven't heard back from the motherboard manufacturer yet.
If this is not the best place to ask this question, can someone please suggest a better place.
-- -Mike
SATA is more or less ATA over a serial cable. You can locate the various ATA standards at
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Mike Warren wrote:
Thanks for the information. For this to work for me, I need the drive to spin down as soon as the motherboard shuts down as the machines will often be moved shortly afterwards.
I haven't been able to find out what documents I may need on that site after a 5 minute look but I'll put more time into it tomorrow.
-- -Mike
Their numbering scheme is indeed not very helpful. The one I could quickly identify for you - the copy I had printed 5+ years ago was within reach :-) - is D1153 , which is ATA-4 (pretty close for what you need although supporting still only 32 bit LBN).
But you may be lucky and do without the SMART features. On 2.5" drives (which I use), I can stop the drive with a "normal" ATA command, I can see I am referring to it as "sleep" in my comments; the command code is $E6 (0xE6, that is). The drive comes out of sleep after that with the first read or (I guess) write command.
Ouch, just looked at my source - before posting. It is my driver which wakes the device up, not the R/W command; it issues an ATA reset to wake the drive up... (which in spite of the name is quite far from a powerup reset, not sure what it did but most if not all drive parameters remain intact IIRC).
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Mike Warren wrote:
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