Re: USB drive spins up every hour
>>>>> My USB-connected drive spins up every hour (or even half-hour).
>>> (...)
>>>>> Any idea what it might be and how to find out and fix it?
>>>>> IIRC, this setting can be defined using hdparm ("-M" flag and also
>>>>> "/usr/ share/doc/hdparm/README.acoustic") but as the man page/doc
>>>>> says, the possible options for this value depend on the hard disks
>>>>> model.
>>>> hdparm only sets the timeout for spin DOWN. My drives spins down just
>>>> fine, the problem is that it spins *UP* even though I don't use it.
>>> I think both settings can be tweaked. "man hdparm" is long but worth
>>> for a slow reading.
>> You're confused. Spin up happens when the drive is accessed and that's
>> all there is to it.
> Well, that's not always the case. There are external drives which have
> embeded in their firmware the power saving routines and spin-down/up
> automatically based on that, regardless the disk is being accessed or not.
Regardless of where the code responsible for the spin-up resides, if the
drive spins up when the drive is not accessed, it's a bug.
> Mmm... if you so sure the disk is awaked by an external application, then
> don't mount it unless you need it, that way the disk can be still powered
> on but it will inaccessible for the system and programs.
Even when not mounted (and with its LVM volumes deactivated) it still
spins-up.
Stefan
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