usb-storage doesn't deal in ATA commands; it deals in SCSI-like commands. If hdparm sends a SCSI command, the driver will pass it on to the chipset. If the chipset can understand the command and do something meaningful with it is a function of what chipset you're using.
Matt
On Fri, Dec 23, 2005 at 12:10:44PM +0200, Mircea Ciocan wrote:
> Well, thanks for the answer but this not a chipset issue, IMHO, is a
> software issue if that ATA command for HDD is relayed over all the
> mass-storage and usb drivers and if the whole chain cope with it and
> don't barf.
>
> Best regards,
>
> Mircea
>
>
> Matthew Dharm wrote:
>
> >There is no way to tell for certain if attempts to spin-down will work with
> >your particular enclosures. Chipsets (and their capabilities) vary widely.
> >
> >Matt
> >
> >On Fri, Dec 23, 2005 at 11:32:09AM +0200, Mircea Ciocan wrote:
> >
> >
> >>Hi all,
> >>
> >>We want to use some standard USB 2.0 enclosures containing a 3.5" HDD
> >>for some backup purposes, the ideea was that those guys could stay
> >>attached and eventally moved to some other machine and so on, so far
> >>everything is OK, there is only one problem I'd like to know of:
> >>
> >>The bloody HDDs gets HOT, like in extremely hot :(, because somehow
> >>seem that they never spin down, I know about hdparam and the stuff that
> >>I could try to spin it down, but ( and there is a big but) will that
> >>stuff work nondistructively on USB mass storage devices as above, will
> >>they be able to be spinned down without losing data, getting disconneted
> >>from the USB bus and other horrors ( and of course, restarted again :) ???
> >>
> >>If somebody could help with a definite answer on that issue, eventually
> >>with some hdparm switches TESTED on such an external disk it will make
> >>me very happy.
> >>
> >>Thank you for your time and season greetings,
> >>
> >>Mircea Ciocan
> >>
> >>
--
Matthew Dharm Home: [EMAIL PROTECTED]
Maintainer, Linux USB Mass Storage Driver
You suck Stef.
-- Greg
User Friendly, 11/29/97
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