Hi, ive been trying to get a 4 way ide riad0 going for a coupla weeks to experiment with setting up a cheap high speed disk subsystem, ive learnt a great deal. The one thing im sure of is that the HPT366 is a piece of #$!@#, it just will not operate in DMA mode under a high load (running bonnie or raid array)... or maybe im just incompetent? Anyway the point of this mail is to try and find some information on the speeds you people out there are getting that do have ide raid0 settup, and what equipment your using? Ive found a few pages with results, but mostly raid5 with few details of the individual drive speeds used, i was thinking it would be handy if there were some results comparing the raid speed versus the individual drive speed. The best estimate i could get of my 4-way ide raid (each drive on its own channel) was about 26MB/s but that was under difficult testing conditions. I dont know if this is normal. The drives i was using were between 17-14MB/s. I had read that nearly linear performance could be achieved. So by my calculations linear speed increase based on the slowest drive would give 4x14MB/s = 52MB/s so i was achieving about 50% of the theoretical max speed (NOTE : i have 4 drives each on its own channel, im not in a master/slave situation). I was pretty disapointed with this and certainly wouldnt concider it to be aproaching a linear performance increase. I would really like to know what is possible with good IDE controllers and drives. So, anyone care to share there stats, im sure im not the only one interested. Thanks Glenn McGrath
