IDE knowledge anyone?

Chuck Guzis cclist at
Fri Dec 11 13:19:34 CST 2015

On 12/11/2015 03:45 AM, Oliver Lehmann wrote:

> You are completely right, but the drive is selected always as this is
> a "one drive only" implementation. The same drive-selection-magic
> would otherwise also apply to the "Read Sector Buffer" command which
> works without any error.

Hmmm, another piece of the puzzle perhaps.  If memory serves, "read 
sector buffer" and "identify" are two operations that are restricted to 
PIO 0 mode (I'll have to check, but I think that's true).

If you issue a "read sector buffer" right after the LBA read sector 
aborts, do you get the correct data back?

If so, I wonder if the drive is expecting that DMA mode will be used by 

Just a thought.


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