When you have 60 hard drives in a server, and server says "Hard Drive SerialNumber #51233142 has failed", you need a quick-and-easy way to find that hard drive.
A sticker with the Serial Number on the correct location will help you find which of those 60-hard drives are broken. Toshiba didn't have their stickers in a location that worked for Backblaze.
On the one hand, you can make 600-labels per rack.
On the other hand, you could just buy WD hard drives at virtually the same price and not have to worry about those labels at all since the sticker is in the correct spot.
Its not that its an unsolvable problem. Its that the solution is not worth the price difference between the drives.
https://www.backblaze.com/b2/storage-pod.html
A sticker with the Serial Number on the correct location will help you find which of those 60-hard drives are broken. Toshiba didn't have their stickers in a location that worked for Backblaze.