Force specific letter for usb drive in /dev/sd*

Question

Is there a way to force an usb drive to always get a specific letter in /dev/sd*? I know about udev symlinks, that does not help.

Answer 1

You need a custom UDEV rule to set this up. Plug the device in and you can find out the vendorid and productid with ...

lsusb 

this will show several lines that look something like this...

Bus 005 Device 003: ID 04fc:0c25 Sunplus Technology Co., Ltd 

From this you can see that ...

• Vendorid is 04fc
• Productid is 0c25

As the device is a storage device we will be writing the rule in 60-persistent-storage.rules. So open this file with your prefered editor (for instance sudo vi /etc/udev/rules.d/60-persistent-storage.rules) and add the following line:

KERNEL=="sd*[0-9]",SYSFS{idVendor}=="04fc",SYSFS{idProduct}=="0c25", SYMLINK+="usbdrive"

This informs udev-manager, that if any storage device with vendorid 04fc and productid 0c25 is plugged into the system to add a symlink in /dev with name usbdrive. I used usbdrive but you can use another name if need be.

From now on you can access this drive with /dev/usbdrive.

_{I used this Source for the example.}