On Thu, 13 Oct 2005, Ian Kent wrote: > On Tue, 11 Oct 2005, Dr. Harold K. Brown, P.E. wrote:
> > The issues at play here is when there are several > > usb-storage devices, (i.e. ipod, memory cards, and > > cameras) mounted in different order and in different > > usb ports the (/dev/sd?) assignment is somewhat random > > from a user standpoint. > I thought that device name persistence was one of the issues > that udev addressed? Well, sort of, but... When I use hotplug USB devices (kernel 2.6.11, hotplug-0.50, udev-053), the primary device name is whatever the kernel feels like, e.g. /dev/sdb1. However, the rules in /etc/udev/rules.d have the possibility of making a symlink with a fixed name, and removing it when the device is unplugged. e.g. /dev/ipod -> /dev/sd(whatever). The hotplug machinery also mounts the device for you, and for me this happens reliably. In the SuSE distro the mount point is auto-created in the /media directory, with a name associated with the particular device which seems to change at every version upgrade, but which at one point included the device's product ID in hex. Thus you can make a symlink to the future mount point of the specific device. Unplugging is another matter -- it's recommended to use "eject" to unmount the device, but I've found that hotplug can usually unmount a truly non-busy device by itself -- but sometimes it messes up. Autofs doesn't seem like the best way to handle USB devices, mainly because it dismounts on a timeout if the mount point has been unused for a (configurable) time, usually set to 5 minutes. James F. Carter Voice 310 825 2897 FAX 310 206 6673 UCLA-Mathnet; 6115 MSA; 405 Hilgard Ave.; Los Angeles, CA, USA 90095-1555 Email: [EMAIL PROTECTED] http://www.math.ucla.edu/~jimc (q.v. for PGP key) _______________________________________________ autofs mailing list [email protected] http://linux.kernel.org/mailman/listinfo/autofs
