n0derunner

Identifying Optane drives in Linux

Published: (Updated: ) in Storage Hardware and Devices, , by . Leave a Comment on Identifying Optane drives in Linux.

How to identify optane drives in linux OS using lspci.

How to identify NVME drive types and test throughput

Published: (Updated: ) in NVME Performance, , by .

Why does my SSD not issue 1MB IO’s?

Published: (Updated: ) in SSD Performance, , , , , by . Leave a Comment on Why does my SSD not issue 1MB IO’s?.

First things First Why do we tend to use 1MB IO sizes for throughput benchmarking? To achieve the maximum throughput on a storage device, we will usually use a large IO size to maximize the amount of data is transferred per IO request. The idea is to make the ratio of data-transfers to IO requests […]

How to identify SSD types and measure performance.

Published: (Updated: ) in SSD Performance, , , by .

The real-world achievable SSD performance will vary depending on factors like IO size, queue depth and even CPU clock speed. It’s useful to know what the SSD is capable of delivering in the actual environment in which it’s used. I always start by looking at the performance claimed by the manufacturer. I use these figures […]

SATA on Nutanix. Some experimental data.

Published: (Updated: ) in Storage Hardware and Devices, , , , by . Leave a Comment on SATA on Nutanix. Some experimental data..

The question of  why  Nutanix uses SATA drive comes up sometimes, especially from customers who have experienced very poor performance using SATA on traditional arrays. I can understand this anxiety.  In my time at NetApp we exclusively used SAS or FC-AL drives in performance test work.  At the time there was a huge difference in performance between […]