I would follow this troubleshooting guide above. This will help further identify the specific issue with your disk-drive. It may be that a sub-board component of the disk drive has failed - like the disk sensor.
From the research I did on my PS3 Slim - CECH-25xx, YES it looks like different revisions have different disk drives. I would advise looking for one that specifically lists the “CECH-XXXX” number with the listing. That’s how I found my replacement drive on ebay. Best of luck!