Messages in this thread | ![/](/images/icornerl.gif) | | Subject | Re: Direct writing to the IDE on panic? | From | Alan Cox <> | Date | Fri, 14 Apr 2006 15:28:34 +0100 |
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On Iau, 2006-04-13 at 09:55 -0400, Steven Rostedt wrote: > Hi, > > I was wondering if anyone has done some work to directly write and poll > to the IDE? This is to store data on a panic or oops. So it would need > to bypass pretty much all the normal Linux mechanisms to do low lever > IDE work.
I've seen some 2.4 work here. For 2.6 the current focus is kexec of course
> Obviously, this would be a slow process, but the system has crashed and > we care more about retrieving information than speed. > > Has this already been done and what issues need to be addressed?
The big issue is 'how am I sure the partition data and code I run are valid post crash'. You don't want the risk of dumping to the wrong part of the disk and making a crash into a disaster.
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