Questions tagged [nvme]

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Do I need to replace my NVME SSD?

I have a simple server setup: 2 NVME SSD disks (both SAMSUNG MZVLB1T0HALR-00000 for 1TB) united into RAID0. OS Ubuntu 19.04 Today my system stopped responding. Reboot didn't help. I connected via KVM ...
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1answer
89 views

How to explain these fio bandwidth results?

Been running a couple of fio tests on a new server with the following setup: 1x Samsung PM981a 512GB M.2 NVMe drive. Proxmox installed with ZFS on root. 1x VM with 30GB space created and Debian 10 ...
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1answer
39 views

add M.2 NVMe enablement kit to HP DL360gen9

I have a HP DL360gen9 8sff Applications running on the machine are saturating the current disks, all Intel Enterprise SSD disks. I would like to add M.2 NVMe drives but I can't figure out which ...
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18 views

Scripting of partitioning NVME disk will not mount

I am trying to update a legacy script that grows an xfs partition on a disk that now uses nvme based drives. It uses parted to remove and recreate the partition over the entire disk. Which now ...
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3answers
213 views

Linus/ext4/nvme crashes during high io

During mvn compilation, I have random crashes. The problem seems related to high IO and in kern.log, I can see things like: kernel: [158430.895045] nvme nvme1: controller is down; will reset: CSTS=...
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1answer
126 views

DELL r630 + NvMe M.2->PCie : Cannot boot Ubuntu installed on M.2 NvMe drive via. PCie adapter

I have plugged in a PNY XLR8 500GB M.2 NvMe drive in a Delock PCIe card and stuck it in Riser 3 on my Poweredge r630 - Although the drive doesn't show up anywhere in BIOS, I could boot the Ubuntu ...
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59 views

Samsung NVMe disappears when server on average to high load

Hello to the community! Let me get into the details of the problem itself. We have a total of 6 SuperMicro Servers in a cluster. The problem occurs only in 3 them, which are the newest generation. ...
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1answer
274 views

Nearly 100% disk utilization after upgrading to debian 10 without any reason

We recently upgraded our servers to debian 10. The setup is completely the same as with debian9 beside of course some new software packages. We are running the default kernel: $ uname -a Linux ...
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1answer
74 views

How to derive bytes written from SMART's host_write_commands?

Using either smartctl 7.0 or nvme 1.7, I get the following data from the SMART log data_units_written : 350,371,149 host_write_commands : 2,974,115,785 Via smartctl, ...
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3answers
98 views

Supermicro NVME ports - how to use?

So, my supermicro X11 Dai-N has 8 pci-e lanes routed to two dedicated nvme ports. I just can’t figure out how to connect my nvme harddisks to them. What’s the name of this port specification? Is there ...
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1answer
624 views

nvme queue depth vs fio iodepth arg relation/explanation

This question is related to fio (flexible i/o tester) utility manages I/O queues for a NVME storage (SSD's in particular) whilst using libaio engine. For testing i am using Ubuntu 14.04 and a ...
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1answer
50 views

Servers with 24 NVMe drives - read throughput [duplicate]

We would like to buy some servers and we are looking into DELL server with 24 NVMe drives (like R740xd2 - 2 socket server) since we need very high read IOPS and throughput. We are however wondering ...
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22 views

How can I make a low-level image an NVMe drive?

I have an Intel NVMe (U.2) drive attached to my computer. TL;DR: How can I create a low-level image of an NVMe SSD (an Intel SSD 750) that includes all data on the drive, including the contents of ...
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0answers
99 views

Connecting SFF-8482 to SFF-8639

I've spent many hours trying to source cables that will connect my Dell H710P RAID card to a pair of NVMe enclosures that resemble 2.5" SSDs. Dell's OEM part #T3F4V to connect drives with the RAID ...
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32 views

Dell R640 + NVMe drives

I have a Dell R640 server with two Dell SAS 600GB 10K drives and I am trying to add a Samsung DCT 983 NVMe drive. I can plug the drive and power lights are one, however, IDRAC9 does not detect it. ...
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1answer
361 views

Supermicro: New NVMe is not detected properly

We have a Supermicro SuperServer 2029U-TN24R4T with currently 8 U.2 NVMe drives (Samsung PM1725a 1.6 TB) running on CentOS 7 with kernel 5.0.10-1.el7.elrepo.x86_64. After adding a new one (PM1725b 1.6 ...
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45 views

Does the HPE ML350 support 970 Pro?

I am going in for an IO intensive application and have though of HPE ML350 for the purpose. I need to know if the NVMe SSDs are supported as boot drivers or not. Also if the drives are supported ...
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1answer
153 views

Is there ready S.M.A.R.T monitoring toolkit for NVME disks (exporter,source,board)?

I already found node_exporter and grafana board for HDD S.M.A.R.T. Can You please get advice or url for ready exporter or other toolkit? I'm trying to wrote my own "messy" text exporter for ...
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0answers
24 views

Can't scale write bandwidth on Linux with Intel Optanes

I have a computer with 3 Intel Optane drives and iotop shows that sequential write to each one separately achieves ~2.2 GB/sec. I suppose that simultaneous writing on all three would result in ~6.6 GB/...
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40 views

ASUS HyperX M.2 x4 only the first device is visible under Ubuntu

I have a Dell T320 with an ASUS HyperX M.2 x4 PCI-e card (in a PCI-e 3.0 x16 socket), and two Samsung 970 PRO in it (in slot 1 and slot 2 of Hyper M.2), but under Ubuntu 18.04.2 LTS I only see the ...
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3answers
2k views

How to limit ZFS writes on NVME SSD in RAID1 to avoid rapid disk wear?

Currently I'm running Proxmox 5.3-7 on ZFS with few idling debian virtual machines. I'm using two SSDPE2MX450G7 NVME drives in RAID 1. After 245 days of running this setup the S.M.A.R.T values are ...
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0answers
1k views

NVME vs SSD: Read/Write performance issue

We have rent some servers from Hetzner.de. A few of them have NVMe hard disks while the others have SSDs. We becnchmarked the read/write performance on 4 of our servers using the following commands: ...
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2answers
2k views

Automatically mount SSD instance storage on AWS EC2 in Ubuntu 16.04

I am using an Ubuntu 16.04 EC2 from AWS on c5d.2xlarge HW. It comes with a 200 GB SSD called /dev/nvme1n1. I am able to mount this drive using: $ sudo mkfs.ext4 -E nodiscard /dev/nvme1n1 $ sudo ...
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0answers
196 views

PCIe: Why pciehp gives contradictory log info

I am running fio jobs on my NVMe SSD and hotplug it then. The platform is hot-pluggable and the system is Centos 7.0.Several seconds after my plug-out, the system encounters a crash and gives these ...
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1answer
766 views

Intel NVME performance on Linux

I have an Intel 760P NVME drive hooked up to a Supermicro X11SRM-F with a Xeon W-2155 and 64GB of ddr4-2400 RAM. The specs for this drive claim 205K-265K IOPS (whatever 8GB span means) with about 3G/...
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1answer
801 views

SSD NVME RAID0 MDADM

My goal is to obtain good writing performances on SSD NVME Disks (benchmarking tools seem to give performances in specific optimized context but far from what we can obtained in real life) My server:...
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2answers
6k views

What does iodepth in fio tests really mean? Is it the queue depth?

I understand queue depth which is the number of outstanding I/O requests that the storage controller can handle (https://www.tomshardware.com/reviews/ssd-gaming-performance,2991-3.html) i.e., this is ...
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1answer
1k views

“Symbol 'grub_efi_secure_boot' not found” after disk replacement on boot (CentOS 7.5, RAID1)

Recently I had to replace a faulty HD at a Centos 7.5 server with RAID1 (2 x Samsung NVMe disks) After disk replacement, server booted using the other drive, I copied the same partitions at the new ...
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0answers
37 views

Two NVMe devices appearing as one

When I run lsblk I see that I have two NVMe devices: $ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT ... nvme0n1 259:0 0 1.1T 0 disk /home nvme1n1 ...
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3answers
1k views

Disabling ext4 write barriers when using an external journal

I'm currently experimenting with different ways of improving write speeds to a fairly large, rotating disk-based, software-raid (mdadm) array on Debian using fast NVMe devices. I found that using a ...
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0answers
191 views

How to setup nvmetcli for FC loopback mode?

I have a NVMe SSD, KC1000, from Kingston and a HBA, QLE2672 2-port 16Gb Fibre Channel Adapter, from QLogic and are installed on Linux kernel 4.16.6. Then I would like to set up a scenario which has a ...
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1answer
1k views

Questions about performance, NVMe drives and virtual machines

I currently have a 4770K with Samsung 850 Evo running Ubuntu 16.04. I create and manage VMs using vagrant with Virtual Box. I recreate VMs frequently and right now, it takes roughly 36 seconds to spin ...
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3answers
673 views

What is the Long term stability of NVMe or SSD stored data?

Background: We need ready access to 30TB of audio data, although only a small fraction of it is ever requested for playback, that playback needs to be done immediately even for multi-year old data. ...
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2answers
2k views

SFF-8639 Backplane - Mixing SAS 12G and NVMe?

On a passive SFF-8639 backplane, with one port per drive, is it possible to connect some of the back side SFF-8643 ports to a SAS HBA and the others to an NVMe card like the Supermicro AOC-SLG3-2E4? ...
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2answers
2k views

Cannot connect to EC2 instance after converting Ubuntu 16 PV to Ubuntu 16 HVM

So it's been a few days and I still can not connect to my new HVM instance with EC2 running Ubuntu 16. For reference, I am trying to upgrade our server from an m3 instance running Ubuntu 16, to a C5 ...
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4answers
7k views

ZFS: Configuration advice 1x NVMe as ARC and ZIL and 4x SSDs for zvols for virtualization

So recently upon testing a ZoL system we found out poor performance of random and sequential reads and poor performance of random writes on our SSDs. Our system is a stripe of 2x Samsung 1TB 850Evo ...
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2answers
5k views

Why is there both character device and block device for nvme?

I am trying to understand the configuration of nvme. But I do not understand why there are two devices: nvme block and nvme character device: crw------- 1 root root 243, 0 Dec 12 16:09 /dev/nvme0 ...
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1answer
2k views

Installing 960 Evo NVMe to PowerEdge R730 [closed]

I'm trying to install Samsung 960 Evo NVMe M.2 SSD to Dell PowerEdge R730 server. When I googled it, I stumbled upon this manual, but it says that I should use a carrier to insert into a disk bay (...
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2answers
606 views

How-To Chain Boot/Trampoline Boot into Ubuntu 17 on PCIe SSD without BIOS support

I have a server-grade SSD (Intel DC P3520) that will eventually end up in a server. Until the server is deployed in the data center I want to conduct some tests in a desktop machine. I have an older ...
2
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1answer
7k views

Mounted disk disappears after reboot

I've got a Centos 7 dedicated server with a SSD + a nvme ssd with 400gb. I followed a tutorial to mount + format (as xfs filesystem) the nvme disk so that I could setup my NoSQL databases on that ...
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0answers
515 views

Encrypt disks using SED and store keys in TPM?

I'm buying servers lately and all of them have disks that support TCG Opal full-disk encryption (aka SED). What I'd like to do is: Store data encrypted-at-rest on the disks (NVMe & SAS). Not be ...
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1answer
246 views

NVMe-Dedicated Server without Virtualisation: Big speed benefit? [closed]

I am currently using a VPS which is virtualised with Virtuozzo and sometimes my blog is starting to deliver in 150ms till 350ms (server response). I assume that the virtualisation is the bottle neck ...
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1answer
2k views

NVMe on old HP Proliant DL380 G6

Do NVMe drives work on HP Proliant DL380 G6 boards? These servers have: 1 x PCIe Gen2 X8 Full Length, Full Height Slot 2 x PCIe Gen2 X4 Half Length, Full Height Slot Is there any interference with ...
1
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1answer
992 views

Linux: Disabling Interrupt Coalescing for NVMe device

I'm looking at testing an NVMe device with interrupt coalescing enabled, and disabled. NVMe protocol defined interrupt coalescing parameters that can be passed to the device, and in free BSD the nvme ...
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2answers
419 views

Any performance gain from multiple nvme drives in RAID versus a single nvme drive?

We've got a cluster of scylladb hosts (it's a cassandra-type database) running on i3 instances in amazon with the /var/lib/scylla/ folder mounted on a single nvme drive. I'm wondering whether there is ...
8
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1answer
727 views

The setup of S2D that delivers up to 2M IOPS to SQL FCI

We are about to deploy shared storage researching for ultra-fast storage to implement Microsoft SQL Server Failover Cluster (FCI). So far the project goes, we would to start with 500K IOPS for 8k ...
3
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1answer
783 views

Is it worse to go with Samsung 960 EVO instead of Pro version in terms of price to perforamce measure? [closed]

We are about to deploy shared storage researching for ultra-fast storage to implement Microsoft SQL Server Failover Cluster (FCI). So far the project goes, we would to start with 500K IOPS and have ...
1
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1answer
875 views

MongoDB with NVMe SSD

Does anyone have recommendations on the RAID configuration when running MongoDB on NVMe SSDs? Is the best practice still RAID10 like with HDDs and SATA SSDs? Thanks.
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2answers
2k views

clone nvme drive with 4096 sector size to ssd with 512 sector size

I have an nvme drive with a logical and physical sector size of 4096. The block size of this drive as reported by blockdev --getbsz command to be 4096 as well. The destination drive is an SSD with a ...
4
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1answer
404 views

NVMe latency monitoring

Is there a way to get read/write queue latencies from NVMe devices? If it's not split for read/write that's better than nothing but ideally I could see these separately. I'd like to go below the ...