TBW rating vs. SMART "Health Status" in CrystalDiskInfo

Joined
Oct 20, 2005
Messages
12,049
Location
PA
WD Green SN350 2TB SSD. Realized after I started using it (derp) that it had a rated endurance of 100 TBW; that seemed low to me, so I've been monitoring the drive periodically with CrystalDiskInfo. Currently at ~2.5 TBW while "Health Status" is still 100%. I didn't really understand TBW ratings or the Health Status indicator, so I started reading up. Wanted to check my understanding so far.

Questions:

1. Am I correct that the manufacturer's TBW rating is basically a worst-case-scenario minimum (possibly lowballed to reduce warranty claim exposure), and thus CrystalDiskInfo's "Health Status" probably won't move much if at all until after that threshold?

2. Apparently the Health Status calculation can be calibrated manually to some extent (second pic below). What does the "Remaining Life" parameter do? What does "10" mean in my case, and how does it affect the calculation?


Screenshot 2025-06-13 at 10.25.16 AM.webp


Screenshot 2025-06-13 at 11.49.07 AM.webp
 
AFAIK, that's the lifespan you can expect before it starts to degrade. The WD Greens are their budget line though so I can kinda see why it's low. The Firecuda 530 in comparison is something like 5,000TBW.

I'm not 100% sure though so @PandaBear will have to verify.
 
Back
Top Bottom