SNIA Developer Conference September 15-17, 2025 | Santa Clara, CA
Salon VI
Mon Sep 18 | 9:30am
Should SSDs supporting power states higher than the maximum TDP dissipation supportable in a system? Many industry standards for drive form factors are targeting <=25W, but will Gen6 SSDs be viable in a x4 configuration or will these form factors be abandoned? What is proposed is a framework currently supported in NVMe and OCP's Datacenter NVMe SSD Specification of allowing enhanced latencies in cases where there is thermal margin above the maximum TDP of the form factor using either host orchestrated NVMe power state management or device orchestrated Host Controlled Thermal Management. The topic will also explore some enhanced terminology around thermal and electrical power limits to help facilitate the discussion.
NVMe-over-Fabrics (NVMe-oF) offers DH-HMAC-CHAP as its in-band method for authenticating hosts and subsystems. To enhance authentication capabilities, the specification recently introduced the Authentication Verification Entity (AVE) – a logical entity designed to manage and verify the authentication process. AVE enables centralized or semi-centralized authentication, simplifying the management of authentication keys and improving security in large fabrics deployments.
However, the specification lacks comprehensive guidelines on implementing authentication mechanisms, particularly in determining when to use single versus multiple authentication keys. This ambiguity existed before AVE and still persists after its addition. The absence of clear recommendations poses challenges for implementers, especially in managing security risks, key isolation, and scalability.
In this talk, we address these gaps by discussing all the recommendations that we identified in the NVMe specification and the open-source ecosystem during our product development.
As SSD capacities increase beyond 16TB, the time to randomly precondition these drives has also increased from several hours to several days. Traditional methods involve a sequential write followed by multiple random writes to reach a steady state. We present Sprandom (SanDisk Pseudo Random) – a novel approach to random preconditioning that uses the Flexible I/O Tester (fio) to achieve near steady-state performance with just a single physical drive write. Our experiments show that using the Sprandom method, the random preconditioning time of large (> 64TB) drives can be reduced from days to hours.
This presentation explains how an NVMe™ PCIe SSD supporting multiple NVMe controllers can be used to create and migrate virtual NVMe SSDs (i.e., Exported NVM Subsystems). The commands used by a host managing these virtual SSDs are fully illustrated using animation and demonstrates the interoperability between different SSD vendors during migration. Come and see how the virtual NVMe SSD is abstracted from the underlying NVMe SSD for the migrating Virtual Machine.