Label your Physical Hard Drives for Easier Troubleshooting

In my desktop computer I have a total of 4 SATA drives. When the drives are in the computer, you can't see the manufacturer's sticker to determine the size nor identify which drive is which. This last time I was working on my machine I decided to take all the drives out and use a white paint marker to write the size on the back end of the drive. Since all my drives have a unique size this takes the guess work out of troubleshooting and removal. It would look nicer with a label but I don't have a label maker.

Any other good tricks?