3 ms·
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
by justsomehnguy 6mo ago
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 https://wintelguy.com/dwpd-tbw-gbday-calc.pl
- _zoltan_ 6mo agoDWPD 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.
- markhahn 6mo agothen either your drives are overprovisioned or read-mostly. it's not that hard to hit 300 cycles on flash.
- deleted 6mo ago[deleted]
- _zoltan_ 6mo agoit's all 4TB or larger plus the drives do wear leveling internally.
- throwaway2037 6mo ago> 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?