Ubuntu – Udev – How to change device group

This works for me:

SUBSYSTEMS=="usb",KERNEL=="sd?1",GROUP="adm",MODE="0777",SYMLINK+="test"

• I don't know why, but ACTION== stopped the rule from working at all.

• The kernel rule was necessary to avoid a conflict between the stick and the stick's partition, I suspect that was the problem you were seeing.

• The symlink is to get rid of an error message about a conflict between the kernel device name and the rule device name. You get a /dev/test that has a symlink to /dev/sdb1, or such.

On 12.04 restarting udev wasn't necessary when testing the rule. Error messages were logged at /var/log/syslog, so I used tail -f /var/log/syslog as I mounted the USB drive to watch for them.

You may wish to add more tests so you can limit your rule to just the drive(s) you want /dev/test to map to in case you might plug a camera or other device in simultaneously with you memory stick.

Maybe the directory where you're trying to mount your drive is not created (/media/MY PASSAPORT); try changing your udev rule like this:

..., RUN+="/bin/mkdir -p /media/My_Passport", RUN+="/bin/mount -o dmask=007,fmask=117,gid=1001,uid=1000 /dev/%k /media/My_Passport/"

the -p argument will not give you an error if the folder already exsits; I changed your "mount" to "/bin/mount" (this is how i've got it in my udev rules) I also changed the name of the directory where you want to mount your drive (no spaces; spaces need escaping); try it like this