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Linux HPA status

Subject: Linux HPA status
Date: Wed, 14 Sep 2005 09:23:58 -0400
All,

There have been discussions on this list before about how Linux treats HPAs.

There was a recent (long) thread on LKML about changing the behavior.

http://testing.lkml.org/slashdot.php?mid=600133

Nothing was resolved, but it looks like a boot option to allow access
to the normal disk space and the hpa space independently may be
forthcoming.

If nothing else, it was interesting to read of some of the various
uses of HPAs (and some of the problems having an HPA causes).

I was especially surprised to read that the IBM Thinkpad has a BIOS
option to enable/disable the HPA on the internal disk. (I have not
verified that.)

It also appears that certain computers routinely disable the HPA
protection, so an image of these sysmtems should be viewed as the
entire disk.

In other cases (more often?), the computer leaves the HPA in place and
the normal and HPA space should be treated as seperate images.

Greg
-- 
Greg Freemyer
The Norcross Group
Forensics for the 21st Century

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