On Feb 17, 2008 2:18 PM, Mark Lord <liml@xxxxxx> wrote:
>
> Richard Liu wrote:
> > Dear Mark:
> >
> > 2008/2/16, Mark Lord <liml@xxxxxx>:
> >> Mark Lord wrote:
> >>> Richard Liu wrote:
> >>>
> >>> Thanks. By running the above data through hdparm --Istdin,
> >>> I see that the drive is indeed identifying itself as a 33MB drive.
> >>>
> >>> Probably because it has been told to do so by either the factory defaults,
> >>> or the BIOS, having enabled these features (which can cause it to report
> >>> fake values for various things):
> >>>
> >>> * Host Protected Area feature set
> >>> * Device Configuration Overlay feature set
> >>>
> >>> So that's why the 1TB drive appears as a 33MB drive.
> >>>
> >>> In the near future, I will be enhancing hdparm to query more
> >>> detailed data from underneath those artificial features.
> >>>
> >>> But you'll have to enable the entire 1TB capacity if you want Linux to
> >>> use it.
> >>> It is currently disabled in the drive, and Linux respects that.
> >> ..
> >>
> >> Okay, hdparm-8.1 is now available from sourceforge.net.
> >> Download it, build it ("make"), and see what you get from "hdparm -N /dev/sdc"
> >>
> >> Thanks
> >>
> > I downloaded hdparm-8.1
> > and here is output information.
> >
> > # ./hdparm -N /dev/sdc
> >
> > /dev/sdc:
> > max sectors = 65134/1953525168, HPA is enabled
> ..
>
> Yes, pretty much as expected there.
>
> You can safely now try this:
>
> ./hdparm -N1953525168 /dev/sdc
>
> If that works, it will have temporarily restored access to the entire drive.
> Then you can try to make it permanent by doing this:
>
> ./hdparm -Np1953525168 /dev/sdc
>
> If *that* also works, then reboot and things should be fine,
> unless your machine BIOS changes it back again on boot.. :/
>
> If either of those *fails*, then it is because your BIOS
> (or possibly the system startup scripts) have "frozen" the configuration
> to prevent changes. Dunno why they would do that, but it's possible.
>
> In which case, you could move the drive to another machine temporarily,
> and then issue that same command there.
>
> Cheers
Mark,
Very cool new functionality in 8.1 Looking forward to testing it this week.
Thanks for your efforts.
I assume DCO is still able to hide sectors from us?
Thanks
Greg
--
Greg Freemyer
Litigation Triage Solutions Specialist
http://www.linkedin.com/in/gregfreemyer
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