SNIA-SDC23-Wells-Does-Gen6x4-Make-Sense-for-SSDs-Claiming-25W-Due-to-Standard-Form-Factor-Recommendations.pdf

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1、1|2023 SNIA.All Rights Reserved.Virtual ConferenceSeptember 28-29,2023Does Gen6x4 Make Sense for SSDs Claiming 25W Due to Form Factor Recommendations?Steven Wells Fellow Suresh Rajgopal-Distinguished Engineer2|2023 SNIA.All Rights Reserved.Trends to Gen6 suggest 25W Power efficiency trends at each P

2、CIe Generation are not keeping up with the 2x speed of each generation Gen5 20-25W Gen625W EDSFF informatively suggested E1.S and E3.S 1T target a maximum of 25W Are there options to benefit from Gen6 without moving to 25W FF such as E3.S 2T,E1.L or E3.L.050100150Gen3Gen4Gen5Gen6Random Read (kIOPS/W

3、att)Power Efficiency Trends10-15W15-20W20-25W35-40W?3|2023 SNIA.All Rights Reserved.What Options do we have?Abandon harder to cool form factors overall as we move to Gen6 Keep the form factors but limit to a maximum 25W power state Higher operating temperatures and/or higher airflows with higher pow

4、er states Other“out of box”thinkingThis PresentationThis presentation will hopefully offer insights to how to rethink power and thermals mitigations at both the Host and SSD while remaining aligned to NVMeTM 4|2023 SNIA.All Rights Reserved.Power Drive reports a table of possible active power states

5、PS0=highest power state PS1-n=lower power states“Host may dynamically modify the power states”using Features Command,optionally persistent PCIe slot power limit needs to be honored Thermals Composite Temperature Host Controlled Thermal Management(HCTM)Set feature offers TMT1 temperature(K)to start t

6、hrottling TMT2-“heavy throttling”Drive can select VU thermal actions or can transition power states Warning and critical thermal notifications.(WCTEMP/CCTEMP)Summary of NVMe SSD Standards for Power and Thermals5|2023 SNIA.All Rights Reserved.EDSFF the well known 25W and 40W“recommended maximum susta