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Questions tagged [nvme]

112 questions
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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 SSDs to test ZFS performance and it was abysmal…
Ajay
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NVMe speed degradation after kernel upgrade

We are testing the speed of two Intel DC P3600 NVMe drives on a CentOS 7.1 system. They are configured in a software RAID1 using mdadm. After upgrading the kernel from the (very old) 3.10 to the latest 4.3 (or 4.2.5) we see can observe a very…
markz
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Health Tests on NVMe

On the servers I have, with HDD or SSD, I have a cron that periodically runs: /usr/sbin/smartctl --test=short/long /dev/sd1 (for each disk) While it runs, it just looks at the output of /usr/sbin/smartctl -c /dev/sd1, looping until it no longer…
Nuno
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Dell R630 supported PCIe to NVMe (m.2) adapter and drive?

I can't seem to find any information anywhere about supported PCIe to NVMe (m.2) adapter and a brand of drive that will also work. I am aware third party adapters and drives tend to work with various OSs (ESXi) but are not compatible and cause the…
user609425
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5 answers

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=0xffffffff, PCI_STATUS=0x10 kernel: [158430.951331]…
Brimstedt
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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 some special cable required? If so, what’s the…
matthias_buehlmann
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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 TB), it shows up for a few seconds in /dev (but…
user3693367
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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 print info: ================ [ 1026.468414]…
Leo Erzhuo Chen
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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 the limitation on a storage controller which…
GP92
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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? The specific scenario I'm looking at is the…
PSpacer
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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 but yet usable machine (AMD Phenom/ASUS M4A88T-M…
i8086
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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 drive. However every time I reboot my server the disk…
kentor
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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 disk controllers?
Luis
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NVMe drives with PLX bridge are slow in performance

Recently I've purchased a couple of NVME drives for a home server I'm running. I decided to make it more budget friendly, and potentially improved IOPs by choosing an Add on card by Supermicro that uses a PLX bridge on a pcie slot to allow two 2.5…
Liang
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How is Hardware RAID for NVME drives configured on SuperMicro?

I've purchased as x13sae motherboard from supermicro which is advertised as M.2 Interface: 3 PCIe 4.0 x4 (RAID 0, 1, 5) M.2 Form Factor: 2280 M.2 Key: M-Key I have two NVME dries in my m.2 ports. I want to put them RAID 1 so I can weather a drive…
Evan Carroll
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