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Questions tagged [nvme]

98 questions
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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 to blink or identify NVMe drives connected to an LSI 9500 tri-mode controller

we have the following setup in Supermicro server: LSI 9400 -> expander -> 10 x HDD LSI 9500 -> expander -> 2 x NVMe |------------| |-----------| | LSI 9400 | |--------------| ----->| HDD x 10 | |------------|…
Patkos Csaba
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AWS: Can't mount my restored volume (EBS snapshot)

I restored an EBS volume from AWS Backup and attached it to a new EC2 instance. When I lsblk I can see it under the name /dev/nvme1n1. More specifically the output of lsblk is: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT loop0 7:0 0 …
DimitrisPrasakis
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NVMe disk problems - smartctl 0x2002 status

My NVMe disk works but it is very slow compared to what it was. I benchmarked it 6 months ago at 2000MB/s using fio, the exact same test now is giving me 350MB/s I ran smartctl but it's giving a 0x2002 status. Is my disk broken? Can it be repaired…
GCPuser
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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 installer from a USB thumb drive and the installation…
Arni J
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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, the first line also shows [179 TB], which is…
Gaia
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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…
smartenbergen
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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 prometheus, but I think that there must be ready…
Kein
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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/sec. But in reality I got only 3 GB/sec if I try…
John Smith
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