We recently purchased a couple Samsung EVO 870s to go in a Dell R630 overseas. Standard horizontal, 10x, 2.5" SAS/SATA backplane.

Remote tech could not get these to slot in. I had him try different caddies, different slots, orientation, screw positions. Not happening. Existing drive in new caddy, same screw position works.

He finally sent me a pic and I noticed this tab. Searches keep saying it's normal and should slot in, but that has to be the problem. I'm also seeing a conspicuous lack of 'vent' holes above where the connector traces lead into the drive body.

My guess is it's a counterfeit drive (this is Malaysia, so certainly not out of the question), but it came from a reputable seller and wasn't suspiciously low-priced or anything. Anyone else had a similar issue or EVO with that extra tab?