FL schrieb:
> Thanks for getting back to me so quickly!

Why should I sleep at midnight? ;-)

> And in my startup script, I have:
> 
> modprobe sg
> chown root.tape /dev/sg0
> chown root.tape /dev/sg1  # moved from sg2 to sg1!!!
> chown root.tape /dev/sg2
> chown root.tape /dev/sg3 
> if [ ! -h /dev/changer ]; then
>     ln -s /dev/sg1 /dev/changer
> fi
> 
> But this is not optimal. According to /proc/scsi/scsi
> I have this entry
> 
> Host: scsi2 Channel: 00 Id: 00 Lun: 00
>   Vendor: EXABYTE  Model: LTO 1x7 2U       Rev: B005
>   Type:   Medium Changer                   ANSI SCSI revision: 04

[...]

> So, after the most cursory reading of the documentation, I guess that I want
> 
> ID=="2:0:0:0" BUS=="scsi" SYSFS{vendor}=="EXABYTE "   NAME="changer"
> 
> to identify the device and set the symbolic link (I also need to set the
> ownership and mode....).

Looks OK, just try it with udevtest.

Why do you want that symbolic link?
Why not use "/dev/sg2" in your config?

But you may use it, sure.

Even better stuff: udev is also able to set the group:

I have (example):

# cat 10-udev.rules
# "chgrp tape" for the changer-robots
BUS=="scsi", KERNEL=="sg?", ATTR{model}=="SA100", GROUP="tape"

Stefan