NVMe: was Building a Linux Computer?

[Carruth, Rusty]

Oohh!  Oohh!! Something I can answer :-)

1 - yes and no.  Yes, you can replace, but no, you (almost certainly) need to get a PCIe card which converts PCIe on the motherboard to NVMe on the ssd.  We have one of those at work, not too expensive as I recall.

2 - You should be able to.  Don't know if that's implemented or not.

3 - /dev/nvme0n1 as an example.  So, for SATA, its /dev/sd<x>  for nvme, you get a /dev/nvme0 and then you get /dev/nvme0n1 for the actual drive, as I remember.  I don't remember what the partitions turn up as, but I THINK they were /dev/nvme0n1p1 or something like that.  A second NVMe drive would be /dev/nvme0n2 I think.

4 - it should.  Now, you MIGHT need some updated stuff, for example smartctl  may or may not work with NVMe on your distro.  And you'll probably need to download the nvme tool that gives you control sort of like hdparm.  Using an 'old' distribution might be a problem (for some value of 'old')



-----Original Message-----
From: PLUG-discuss [mailto:plug-discuss-bounces at lists.phxlinux.org] On Behalf Of Steve Litt
Sent: Tuesday, May 22, 2018 2:30 PM
To: plug-discuss at lists.phxlinux.org
Subject: NVMe: was Building a Linux Computer?

On Tue, 22 May 2018 13:57:29 -0700
Brian Cluff <brian at snaptek.com> wrote:

> For me, I would get a system that can use a NVMe.  They are about the 
> same price as an SSD, but make and SSD look extremely slow.

This is the first I've heard of NVMe. I just read
https://en.wikipedia.org/wiki/NVM_Express , and now have some questions:

1) Can I replace the spinning platter 2.5" hard disk in my 5 year old
   laptop with an NVMe device? My research tells me an NVMe must plug
   into a PCIe slot rather than a SATA slot.

2) Do you fstrim NVMe-hosted partitions the same way you do for SSD?

3) When you install an NVMe card in a PCIe slot, what device name shows
   up? Is it sd-whatever, or something else?

4) If my desktop has a free PCIe slot, does that mean I can plug in an
   NVIe drive and use it?

Thanks,
 
SteveT

Steve Litt 
June 2018 featured book: Twenty Eight Tales of Troubleshooting
http://www.troubleshooters.com/28


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