On Saturday 27 November 2004 01:18, Aleksandar Milivojevic wrote: > Your USB camera would than be /dev/dsk/c2tXXXXd0sY, where c2 is your USB > controller, and XXXX is some uniq ID stored in your camera hardware. > Your USB drive would have different uniq ID. No matter in which order > you connect them, they are always assigned same device names. You don't > need labels on them. I don't know much about USB internals, but I guess > there's probably something in each USB devices to make more or less uniq > device name. Sun controls the hardware; that makes Sun's task much easier. Linux has to cope with users who plug almost anything in; two SCSI conrollers - one dies buy another (different brand), maybe shuffle. Disk drives in RAID come and go. Conceivably a an old drive could be retired then be reinserted in a different place. My USB camera: my demo machine has two USB connectors. I'll plug itinto either one. Sometimes I have my USB keyboard in there. Or I might plug in my USB hub. Life with my Athlon is even more interesting; it has six external USB connectors, but as they're all on the back they're not very convenient. So atm my USB hub is plugged into that. I saw some discussion about this on lkml some time ago. Some of the above is based on what I recall. Solaris only has to deal with a small range of hardware. Ideally, whatever Linux does has to work on everything from watches (no I am not joking) to top-500 supercomputers, on ARM, MIPS and PPC processors in imbedded devies, on Power, Sparc64 and MIPs processors in seriously big boxes and in IBM's zBoxes where I/O is measured in gigabytes/sec. -- Cheers John
