Re: What to do about the 2TB limit on HDIO_GETGEO ?

[Matt Domsch]

On Tue, Mar 25, 2008 at 01:45:35PM -0400, Greg Freemyer wrote:
> I believe GUID Partition Tables (GPTs) are the answer.
> 
> I believe one of the features of GPT is the elimination of the 32-bit
> sector restrictions.
> 
> http://en.wikipedia.org/wiki/GUID_Partition_Table
> 
> Windows VISTA 64-bit supports GPTs on data disks and new Mac OS based
> systems have been using it on internal drives for a couple years at
> least.
> 
> GPTs are part of the Extensible Firmware Interface (EFI), so they
> should be usable for PC bootable disks at some point.  (Maybe now in
> some cases?)
> 
> I'm not sure what the Linux Kernel support is for GPTs.

It has been supported since the first Itanium systems shipped.  It's
the first code I wrote 7+ years before it was really needed. :-)  Most
distributions have it enabled, as do userspace tools like GNU Parted.

-- 
Matt Domsch
Linux Technology Strategist, Dell Office of the CTO
linux.dell.com & www.dell.com/linux
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