29 May
2006
29 May
'06
19:15
Carlos E. R. wrote:
That I understand. But my question was in the line of why raid-5 uses, or has to use, PIO instead of DMA. What is so different for raid-5. I can guess, but I don't know.
I'm guessing what Bryan is trying to say is that every RAID5 write requires CPU-cycles, even if the resulting data-write is almost certainly done with DMA. So in effect RAID5 sort of becomes a little like PIO. /Per Jessen, Zürich