Tough to say for sure. Yeah, the one on the right could be a tvs, but also a rectifier diode or a schottky. You’ll need to examine its place in the circuit. If it is in series only, and it is forward biased, it is probably a rectifier. If the anode (the end without the line) is connected to ground, and it is reverse biased, then it is likely a tvs, although there are also bi-directional TVSs available.
Not even sure about the other one. According to www.marsport.org.uk/smd/mainframe.htm it could be a zener diode, but then you’d need to know the value. I’m guessing you really need the data on that drive. Did you consider a data recovery service? If you’re going to diy, I think the best bet is to buy another of the exact same drive and, if you have the proper equipment, transfer the two components from the donor to the existing board. I looked into it a bit more and you can’t really swap the entire controller board because the head calibration data is in there and each drive is factory calibrated. Good luck.