Messages in this thread | | | Date | Tue, 25 Jul 2000 16:51:26 +0100 (BST) | From | James Sutherland <> | Subject | Re: Direct access to hardware |
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On Tue, 25 Jul 2000, Stuart MacDonald wrote:
> Which is exactly the point. The hard drives should be checking for > invalid ATA commands in hardware, right in the drive, preventing > damage from bad commands. Putting a filter into the kernel is not > the right fix.
As with some of the Intel CPU bugs, the problem is NOT "invalid ATA commands" - it's a matter of VALID commands which are dangerous. FDIV on early Pentiums isn't an invalid instruction - it just produces the wrong results at times. So the SOFTWARE must do something to avoid this - either that, or you need to replace the hardware, which isn't desirable. You do something in the OS to prevent these problem commands being used.
James.
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