Re: HD problems

[John Aldrich]

> > means the third PIO mode.  There are 4 PIO modes standard and a few
> > others.  UDMA 2 is related with PIO?  Sizes are accurate.
> 
> I don't know what the U is.  DMA is direct memory access, meaning the
> channel does the IO to a block of physical memory.  In PC's, it is used
> mostly for the floppy(!).  With PIO, all data goes to and from the hd 
> through the CPU.  (This is why a good modem has a fifo :-). 
> 
UDMA stands for "ULTRA DMA" Supposed to be VERY fast!
>