Shulou(Shulou.com)06/01 Report--

In this issue, the editor will bring you about whether NVMe can work under Linux. The article is rich in content and analyzes and narrates it from a professional point of view. I hope you can get something after reading this article.

In case you haven't noticed, some extremely fast solid state disk technologies can already be used on Linux and other operating systems.

NVMe means non-volatile memory host controller interface specification non-volatile memory express, which is a host controller interface and storage protocol used to accelerate data transfer between enterprise and client systems and solid-state drives (SSD). It works through the high-speed PCIe bus of the computer. Whenever I see these nouns, my feeling is "envy". And the reason for envy is very important.

With NVMe, data transfer is much faster than rotating disk. In fact, the NVMe driver can be 7 times faster than SATA SSD. This is more than seven times faster than the solid state drives that many of us use today. This means that if you use a NVMe drive as the boot disk, your system can boot very quickly. In fact, anyone buying a new system these days may not consider those that don't have their own NVMe, whether it's a server or a personal computer.

Right! NVMe has been supported since Linux kernel version 3. 3. However, to upgrade a system, you usually need both a NVMe controller and a NVMe disk. Some external disks are fine, but to connect to the system, you need more than a generic USB interface.

First check the kernel version using the following command:

$uname-r5.0.0-15-generic

If your system already uses NVMe, you will see a device (for example, / dev/nvme0), but only if you have a NVMe controller installed. If you do not have a NVMe controller, you can use the following command to get information about using NVMe.

$modinfo nvme | head-6filename: / lib/modules/5.0.0-15-generic/kernel/drivers/nvme/host/nvme.koversion: 1.0license: GPLauthor: Matthew Wilcoxsrcversion: AA383008D5D5895C2E60523alias: pci:v0000106Bd00002003sv*sd*bc*sc*i* the above is whether the NVMe shared by the editor works under Linux. If you happen to have similar doubts, please refer to the above analysis to understand. If you want to know more about it, you are welcome to follow the industry information channel.

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