On Fri, 12 Feb 2010 10:59:22 -0600 Mikkel <mikkel@xxxxxxxxxxxxxxxx> wrote: > On 02/12/2010 05:40 AM, Alan Cox wrote: > > > > You also want to avoid two disks on one cable as the IDE interface only > > allows one of them to be active at a time so its a good way to cripple > > performance. > > > Dumb question - what happens if you have a slow interface on the > CD/DVD drive? Does the driver change access modes depending on if it > is talking to the master or slave, or does it pick the lowest common > denominator? I seam to remember that being a problem at one time, > but things have changed a lot sense then... Most controller hardware supports switching the mode according to the device. In some of the other cases the drivers (particularly the libata ones) also know how to change mode in software when switching device. SATA killed that problem off. Modern hardware with AHCI interfaces enabled dump all the work on the controller and allow multiple commands to be queued at once. That improves things even further. Alan -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Communicate/MailingListGuidelines
