re ide vs scsi dxb psuvm psu edu writes in article qlbrlinn rk dns nmsu edu bgrubb dante nmsu edu grubb says in pc magazine april although scsi is twice as fasst as esdi faster than ide and support up to devices its acceptance has long been stalled by incompatability problems and installation headaches i love it when magazine writers make stupid statements like that re performance where do they get those numbers i ll list the actual performance ranges which should convince anyone that such a statement is absurd scsi i ranges from mb s scsi ii ranges from mb s ide ranges from mb s esdi is always mb s although there are some non standard versions all this shows is that you don t know much about scsi scsi with a scsi controler chip range is indeed mb s and that is all you have right about scsi scsi with a scsi controller chip mb s with mb s burst bit note the increase in speed the mac quadra uses this version of scsi so it does exist some pc use this set up too scsi bit scsi mode mb s with mb s burst scsi bit wide or fast mode mb s with mb s burst scsi bit wide and fast mb s with mb s burst by your own data the although scsi is twice as fast as esdi is correct with a scsi controller chip scsi can reach mb s which is indeed faster than ide of is all these scsi facts have been posted to this newsgroup in my mac ibm info sheet available by ftp on sumex aim stanford edu in the info mac report as mac ibm compare version txt it should be but may still be there part of this problem is both mac and ibm pc are inconsiant about what scsi is which though it is well documented that the quadra has a scsi chip an apple salesperson said it uses a fast scsi chip not at a mb s mb s burst it does not scsi is mb s maximum synchronous and quadra uses ansynchronous scsi which is slower it seems that mac and ibm see scsi interface and think scsi when it maybe a scsi interface driven in the machine by a scsi controller chip in bit mode which is much faster then true scsi can go don t slam an article because you don t understand what is going on one reference for the quadra s scsi controller chip is digital review oct v n p
