execute script after (auto)mounting external device

[Tom H]

>> I would like to execute a script after a certain external device has
>> been (auto)mounted.

> http://ubuntuforums.org/showthread.php?t=502864

> I used this method for a client to use a specific usb hdd's for backups
> when they plugged them in. Think this is what you are shooting for,
> good luck.

Good thread thanks. Although I would try to create a rule without
"ACTION=="add"" first and not prepend "ACTION=="add"" if it is not
needed.

It shows that my earlier suggestion of ""SUBSYSTEM=="block"" was
incorrect. Sorry (I was at the end of an 18.5-hour shift after all!).