[justsomehnguy]

Extremely dense QLC chips. Still it's 2700-3000MByte, ie ~3GByte/second.

What should worry way more is DWPD which is abysmal... on the first glance. But if you punch it in the calc it still would take ages to wear it out.

                    SSD #1    SSD #2     SSD #3
    Capacity (GB)   245000    245000     245000
    Warranty (yr.)  3         3          3
    DWPD            0.3       1          0.075
    TBW (TB)        80482     268275     20121
    TBW (PB)        80.483    268.275    20.121
    PBW             80.483    268.275    20.121
    GB/day          73500     245000     18375
                
    Time period Average host-side write data rate (MB/s) needed for reaching DWPD value within specified time period
    8 hr.           2552.08   8506.94    638.02
    12 hr.          1701.39   5671.30    425.35
    24 hr.           850.69   2835.65    212.67

https://wintelguy.com/dwpd-tbw-gbday-calc.pl

[_zoltan_]

DWPD was the boogey man 10 years ago. everybody worried about it.

now, nobody cares. I have over 500 NVMe drives in our deployment and the drive deaths are not due to wear.

[throwaway2037]

    > I have over 500 NVMe drives in our deployment and the drive deaths are not due to wear.

This is high quality anecdata. What is the root cause of most of your drive deaths?

[markhahn]

then either your drives are overprovisioned or read-mostly.

it's not that hard to hit 300 cycles on flash.

[_zoltan_]

it's all 4TB or larger plus the drives do wear leveling internally.