On Fri, Jun 20, 1997 at 12:12:14PM -0500, Nathan E Norman wrote: > On that linux-raid list I told you about, someone was discussing IDE > performance. Seems that with their testing, which may or may not have > been very accurate, that putting IDE disks on the same or seperate > controllers seemed to have very little difference in performance. I > suspect this has more to do with the crappiness of IDE than anything to > do with the md algorithms.
In fact, depending on your hardware, the performance might even be worse. I have a Shuttle HOT-553, which is a Triton HX motherboard. I have a Western Dig 1.6gb on the primary, and a Quantum 3.2gb which was on the secondary. Linux would initially enable the DMA for the Quantum, then disable it when it mounted the partitions, after a timeout. This doesn't happen now that I've moved the Quantum onto the primary with the WD (although it still happens to my CD-ROM drive which is on the secondary). I don't know if there's a performance difference, but I couldn't be any worse off. So in summary, DMA does not seem to work to drives on the secondary controller, while it works fine on the primary. Hamish -- Hamish Moffatt, StudIEAust [EMAIL PROTECTED] Student, computer science & computer systems engineering. 3rd year, RMIT. http://hamish.home.ml.org/ (PGP key here) CPOM: [**** ] 48% The opposite of a profound truth may well be another profound truth. --Bohr -- TO UNSUBSCRIBE FROM THIS MAILING LIST: e-mail the word "unsubscribe" to [EMAIL PROTECTED] . Trouble? e-mail to [EMAIL PROTECTED] .
