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Questions tagged [nvme]

112 questions
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LVM Thin pool performance with NVMe

I have 24 Samsung PM1733 7.68 TB and a server platform Gigabyte R282-Z94 with 2x 7702 64cores AMD EPYC. OS: Oracle Linux 8.6, 5.4.17-2136.311.6.el8uek.x86_64 I need this server for testing so I have to use a thin pool in my environment (i need…
shallrise
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changing queue parameter nr_request on NVMe dev

We would like to use NVMes (SAMSUNG MZ1LB1T9HALS-00007) as a cache-tier in a Ceph System (17.2.0). The problem is that the stored data has a lot of small files and if hot-tiering is set to ~70% on the NVMes many slow-ops show up. Therefore, we…
pawel_winzig
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Does interface bandwidth and/or interface type (SATA/NVME) affect IO and Random 4KB RW performance

TLDR: The advertised IOPS of NVME drives is leaps above any SATA SSDs, but how much of this is due to limitations of the: Interface (SATA/NVME) Interface Bandwidth (PCIE Gen 4, Gen 3, SATA 3, SATA 2) Or Memory Controller Quality? Premise: I've got…
James Hopwood
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Extend the root partition

We need to extend the root (nvme0n1p1) partition that is adjacent to the 2nd SWAP (nvme0n1p2) partition that is adjacent to the third (nvme0n1p3) LVM2 partition that has 2 volume groups in ext4 format inside the LVM2. One of the volume groups is…
linuxbitcoin
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ZoL+FIO Randwrite nvme bs=8k@32io = 148MiB/s?

Sorry for the title, but it's very short summary of BS that I'm looking into. Situation I'm using ZoL 2.1.5 (from jonathonf's ppa) on Ubuntu (tried 20.04&22.04) I have following NVMe disk Kingston KC2500 1TB (/dev/nvme0n1) formatted as 512 (with…
Vladislav Losev
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How does RAID0 affect IOPS performance for NVMe SSDs?

I have an application which needs to read large amounts of small and randomly distributed entries from storage. To improve the performance I am considering to install a specialized hardware RAID controller (like a Highpoint SSD7505) together with…
Bobface
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In NVMe, what is the difference between a reserved log and an unsupported log?

I'm reading through the NVMe specification. On page 237 it says the following for get-log return value 0x09: Invalid Log Page: The log page indicated is invalid or not supported. This error condition is also returned if a reserved log page…
Grant Curell
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centos7.9 mdadm raid0's performance which is only 50% of centos8 mdadm raid0

I use the same PC and same NVMe SSDs do the raid performance test on different OS. The steps are as follows: mdadm -C -v /dev/md0 -l0 -n4 /dev/nvme[0123]n1 mkfs.xfs /dev/md0 mount -o discard /dev/md0 /data fio --bs=128k --ioengine=libaio …
springeee
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Google Cloud Platform instance creation failure (Invalid value for field 'resource.disks[1].initializeParams.diskSizeGb')

I'm trying to create an instance using GCP. The followings are the specifications (the rest of the settings are set as default): Region: us-west1-b GPU type: NVIDIA Tesla V100 Number of GPUs: 1 Series: N1 Machine type: Custom (12 vCPUs, 64GB…
SHM
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Does the Dell PowerEdge R240 support booting from M.2 NVMe drives?

Did anybody try whether the Dell PowerEdge R240 (or the 14th generation in general) supports booting from M.2 NVMe disks inserted through some (non-Dell) PCIe-M.2-adapter card? Dells manual doesn't mention it, unfortunately. I know that older models…
miho
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PCI NVMe mdadm RAID1 performance too slow

I know this has been discussed multiple times but I have not found any solution so far that worked so posting here hoping there is some solutions in Dec 2021… I have a Dell R640 server with dual Xeon Gold processors and 384gb ram. The chassis is…
JackFrost
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Can we prevent Windows from marking NVMe drives as removable?

I've noticed recently that when adding NVMe drives to Windows, it has a tendency to mark them as removable. I think this is more likely on "enterprise" NVMe SSDs, at least in my experience. For my own PC or less critical stuff, I'm not too bothered…
DraugTheWhopper
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How do you generate a new encryption key for a drive that uses SED (Self Encryption Drive)

So I'm currently learning more about NVMe drives that ship with a feature called SED (Self Encrypting Drive). Take the Smasung 970 EVO for instance. It clearly states that it features SED. The 970 EVO provides multiple advanced data encryption…
John V Dole
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How do I maximize nvme raid0(md) performance (in linux)?

Nvme raid0 read(and write) performance is sometimes worse than the performance of one individual underlying drive. hdparm -t /dev/md0 : Timing buffered disk reads: 7054 MB in 3.00 seconds = 2350.46 MB/sec hdparm -t /dev/nvme0n1 : Timing…
Horatiu
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Single-disk array full: how to add a spare disk without losing data?

So I rent this server from Hetzner and it was labeled as 2x512gb nvme ssd. Indeed, the server contains two 512 gb nvme ssd but (my fault) I noticed only later that they were in some sort of software RAID. I managed to remove a disk from the array…
Wyatt Gillette
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