Alan Cox wrote: > > > modern IDE disks can only do about 16-20 MB/s *sustained writes*. At the > > hub, I've seen a 43GB SCSI disk do 22MB/s, and tailing off after that. A > > 10,000rpm 9GB scsi disk was performing similarly I seem to recall. If > > Remember that as density goes up so does speed when not seeking.. 9Gb disks > are much slower as they get less bits/rotation. Right, I was comparing 43 GB 5400rpm disks to a 9GB 10000rpm drive, they preform about the same due to the higher linear density on the larger disks, as you said. > > you need to sustain 25 or more, you may be able to do this with a > > stripeing raid array of 2 or more disks, either scsi, or perhaps one of > > the IDE raid controllers. I don't know if the rawio stuff will work on a > > raid device tho. > > The 3ware raid cards doing raid 0 striping give pretty much perfect scaling > at least to 4 disks. Much recommended toys Interesting, I'll have to look them up. We're doing network monitoring on PCs with linux, a PoS OC48 channel in one direction alone can carry 320MB/s! We're not trying to write *that* to disk of course. Stephen. --
