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1. CRYSTALDISKINFO NOT SHOWING TOTAL HOST WRITES FULL
2. CRYSTALDISKINFO NOT SHOWING TOTAL HOST WRITES FREE

My WD black sn750’s 1TB are 0% and 1% health atm, but I’m done plotting now so I dont think I will kill them. But if the consumer models actually survive much longer than their TBW rating, the equation changes, so this is why it is interesting to know how long they survive in real world plotting conditions. But they are much cheaper so many people still opt for them over enterprise ssd’s. They are supposed to be a “bad choice” for plotting because of the low TBW rating. The question here is if anyone actually killed their consumer ssd by plotting Chia.

We all know enterprise ssd’s last for a long time and some are super fast as well, we also know that they cost an arm and a leg. I think that was your intention right? You were messing yourself up a bit there with the nvme/u.2/sff discussion as that is just the form factor or connection type and not really relevant to the TBW rating or internal components.

CRYSTALDISKINFO NOT SHOWING TOTAL HOST WRITES FULL

In your case, the apparent inconsistency in SMART values may be due to different workloads, one drive being more full than the other for more of the time, disabled or inefficient TRIM, or maybe even different operating temperatures. In addition to the above, factors such as operating temperature may also contribute towards the drive health percentage value, but as it’s a “black box”, we can only make guesses here.

CRYSTALDISKINFO NOT SHOWING TOTAL HOST WRITES FREE

Keeping the WAF low is crucial to ensure SSD longetivity, and this can be achieved with the usual best practices such as ensuring TRIM/discard is operating correctly, and keeping lots of free space available on the drive (Mad Max’s “serial” plotting is preferable as it keeps SSDs less full compared to the official plotter doing multiple plots in parallel).

Divide this by the host writes to get the Write Amplification Factor (WAF), on my Intels it’s 1.2. Overprovisioning flash is one way to mitigate the effects of Write Amplification, and this is probably another metric used to calculate the drive health percentage value.ĪFAIK, Samsung NVMe consumer SSDs don’t expose the NAND writes value, but Intel DC drives do (use nvme-cli to get the nand_bytes_written). This is why the drive health percentage is not exclusively attributable to the “Data Units Written” value, even though they are related. The “Total Host Writes” presented by utility apps (Samsung Magician, CrystalDiskInfo) is derived from the “Data Units Written” SMART value which is the number of 512 byte units that the host has written to the drive, or more specifically, to the controller.ĭue to Write Amplification, the actual amount of data physically written to NAND flash (“NAND writes”) is usually more than the “Data Units Written” by the host. I rebooted Crystal Disk Info, Rebooted computer.

(no percentage of life left) It works just fine. I just plugged it in to check it with Crystal Disk Info ( Version 8.5.2 圆4) It is giving me a Caution Health status, but its not showing Total Host Reads, Total Host Writes. The drive health percentage is a “black box” value calculated by the SSD itself, using internal telemetry data that is not necessarily exposed by SMART, and it is not exclusively derived from the “Total Host Writes”. I have a WD Elements 3 TB External Hard Drive.