On 10/11/07, Edwards, David (JTS) <[EMAIL PROTECTED]> wrote: > Hi again. > > Just a wrap up to this thread. > ----------------- > > Disk naming seems to be consistent after you first plug the device in. > > So: > The first disk plugged into a port (say "addr 2") gets sd1 (if your SATA > disk is sd0) > The second disk plugged into another port (say "addr 3") gets sd2, etc > > If you unplug the first and the second and then plug the second in again > first (to the same port of course "addr 3" :-) it still seems to get > sd2. But I doubt you can rely on this. Also at boot time, it's unclear > which disk device will be allocated to which physical port. > > I'm not happy with the fact that the script uses dmesg output. dmesg > uses a ring buffer and that can fill very quickly (say if you unplug a > usb disk while something is writing to it) which will break the above > script totally. However, currently I don't have the time (or probably > the expertise) to go through the source to work out a better way to do > it.
everything in dmesg is also dumped to /var/log/messages. disk naming *is* consistent in OpenBSD. devices are all named in a deterministic manner, so that they won't change on you without you realizing it / adding an extra layer of naming indirection. What are you actually trying to do here? boot from a USB disk? -Nick
