[ltp] Re: Hybrid HDD in X200s?

[Henrique de Moraes Holschuh]

On Sat, 24 Jan 2009, Mircea Gherzan wrote:
> Christoph Bier <christoph.bier@web.de> wrote:
> > I did not run 2.6.28 but a patched 2.6.27 kernel. There is
> > /sys/block/sda/device/unload_heads.
> > 
> > chris@skull-tp:~$ sudo hdparm -i /dev/sda | grep Model
> >  Model=ST9250827AS                             , FwRev=3.CMF   ,
> > SerialNo=            5RG5S1PF
> 
> This is quite unbelievable! I do have the same hard drive model as
> yours (with the exact firmware revision), but mine _lacks_ the unload
> feature.
> 
> I'm wondering: is there any chance that the Windows driver/utility
> might change the result of the IDENTIFY DEVICE ATA command (think of
> it as enabling/disabling the unload feature). 

Yes.  Many HDs support something like that, and it might be persistent
(you'd need to issue a command to enable the features that were disabled).

However, I'd say this is now at the "ask Seagate about it if you want to
really know what is happening" stage.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh