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Questions tagged [ssd]

Solid-state drive refers to a data storage device that uses solid-state memory to store its persistent data.

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3rd party SSD on DL360e Gen8 V2

i want order DL360e Gen8 V2 without any drives , i have read lost topic regarding unsupported SSDs drive to the HP server or fan noise... we need 1TB SSD Drives Someone has ever test and success ...
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15 views

Best configuration for a software RAID 10 SSD for VM xenserver [on hold]

I have xenserver servers. For storage of virtual machines, I use the software RAID 10 (the disks are directly in the servers). I would like to know the best configuration for 4 SSD disk in RAID 10 ...
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2answers
93 views

Low random read IOPs for 5 SSDs in hardware RAID5 setup

We have 5 Toshiba Px04Srb192 SSDs (270K random read IOP as per spec), setup in hardware Raid5. Running fio is giving 250K IOPs which is much below what I was expecting. /fio --randrepeat=1 --...
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1answer
59 views

Can consumer SSD over-provisioning improve performance?

While reading up on ways to improve SSD endurance, I came across an Intel whitepaper on the subject of SSD over-provisioning (limiting the host-adressable space on a drive or not including some of the ...
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Making a near empty flash drive easy to compress

I have a flash drive, which is ten-percent full, but has been used extensively. (i.e. a large minority of blocks will contain random noise.) In order to make a small, compressed image of this drive (...
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Ubuntu new ssd provisioning / Mysql growing out of space

One of my weekend project is growing virally and its mysql database is growing and I am running out of space. Here's what df -h looks like at the moment. Filesystem Size Used Avail Use% Mounted ...
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1answer
37 views

Lack of TRIM support — will benchmarks get progressively slower on ZFS + SSD?

Context: I'm on a Toshiba 512 GB NVMe (Model: KXG50ZNV512G) I'm seeing this weird behaviour while benchmarking Postgres on ZFS-on-Linux (via pgbench), where the second and third runs of a benchmark ...
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36 views

Difference in utilisation reported by iostat for two identical disks in RAID1

I'm trying to debug some weird behaviour with Postgres performance and am trying to understand the iostat output. I'm on 2x SSD on RAID1. Why would one of the disks be reported at ~21% utilisation ...
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3answers
125 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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31 views

How to recover an SSD (Samsung) after deleting all the namespaces?

I deleted all the namespaces (2 were present) on a samsung drive (SSD). Now the drive is not being recognized by the system. How do I recover the SSD?
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Zookeeper best practice - using only SSD disks

we have HDP clusters version 2.6.0 / 2.6.1 ( hortonworks ) , and maybe in the future the version 3.0 I searched a lot in HORTONWORKS documentation , but not found the details about using SSD disks ...
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38 views

Does advice on aligning SSD block sizes apply to “cloud persistent disks?”

I recently read that differences between disk page size in the partition vs flash storage can hurt write performance. So, I checked the partition sizes on some database disks with parted and got ...
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32 views

SSD cloud hosting showing rotating disk device

I have some application hosted on OVH public cloud supposed to be run on a SSD drive. When I'm connected on the instance through a terminal, cat /sys/block/sda/queue/rotational outputs 1, meaning that ...
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140 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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1answer
50 views

Windows 10 install power loss, SSD now unrecognised

Recently I was doing a Windows 10 upgrade on a machine when a user turned the machine off (at the plug). They were running a Sandisk 500GB SSD and when rebooted the machine said that there was no ...
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Using hdparam for more strenuous tests

So I am tasked with getting some strenuous raw hard drive performance tests. We started with FIO but this has proven to be ineffective as the results are poor in windows and linux. I tried Bonnie++ ...
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2answers
100 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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1answer
101 views

Windows encrypted software raid

Is it possible to have (preferrably with Windows-on-board tools of Windows Server 2012 R2 and Windows Server 2016) to have a software raid mirror on 2 encrypted disks? (Locally preferred.) From what ...
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hdd vs ssd for php/mysql dedicated server [duplicate]

I'm migrating a server and I have to choose between: SoftRaid 2x4TB sata SoftRaid 2x450GB SSD nvme The server will basically run nginx+php7.2+mysql8 The response time is very important for our ...
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2answers
98 views

Can data be recovered from a scrambled SSD?

If I "shred" (this is a Linux utility/command) an SSD, can the data still be recovered?
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30 views

SSD errors under NetApp E-Series 5424

We're having some weird issues with our Storage (netapp e-series 5425) and a bunch of SSDs. Technically they work fine, we can do all operations on it, whatever runs on it runs fine, but we keep ...
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Windows Server 2016 installation hangs on new SSD

I hope Server Fault is the right place to ask, move to Super User if that is more appropriate. I am trying to do what I thought would be a simple upgrade of Windows Server 2012 to 2016 with a new SSD ...
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1answer
453 views

Offline uncorrectable sectors in SSDs being used for ZFS L2ARC?

I have two enterprise-grade SSDs that I've been using for L2ARC in an OpenZFS pool for a few years. Workflow during this time has been fairly heavy, with lots of reads and writes, serving up video to ...
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1answer
155 views

Need to upgrade Azure VM Standard HDD to SSD?

I've got an email from Azure : "Adjust your disk throughput or upgrade to premium disk storage. You’re receiving this email because you’re running infrastructure as a service virtual machine (VM) ...
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1answer
51 views

What is the difference between the cloud disks supported by Alibaba Cloud?

When creating an ECS instance on Alibaba Cloud, I often get an option to choose a cloud disk e.g. from Ultra Cloud disk and SSD cloud disk. What is the difference between these cloud disks and what ...
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1answer
15 views

Requirements analysis for CPU-bound task writing to disk

I have a data-analysis application which is CPU-bound, and produces ~35 MB/s of data per thread of execution. I'm trying to work out how many threads I can run concurrently, and be able to write to ...
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4answers
87 views

Raid 1 with 3 disks of different sizes

I'm new to this site. I am currently configuring a server, which has these ssd disks: 1X1TB SSD NVme 2X512GB SSD NVMe Now I would like to create a raid 1 between these disks, in which I would always ...
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1answer
321 views

Poor write performance of software RAID10 array of 8 SSD drives

I have server with Supermicro X10DRW-i motherboard and RAID10 array of 8 KINGSTON SKC400S SSDs; OS is CentOS 6 # cat /proc/mdstat Personalities : [raid10] [raid1] md2 : active raid10 sdj3[9](S) ...
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1answer
29 views

Strange file corruptions in ext4

Recently I came in contact with what appears to be disk corruption scenarios, and I would like to understand them better. I have a build server which I work with daily. During one full build of a ...
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2answers
207 views

Does `diskpart clean` send a TRIM command?

If I have a full SSD and clean it with diskpart clean, will the SSD controller receive a TRIM command (assuming I'm running in AHCI mode)? This would be crucial for performance or even healthiness of ...
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1answer
52 views

Why do Enterprise SSD's have different sizes than consumer drives

When creating a quote for a few physical machines recently I was noticing that the "consumer" grade SSD's came in standard sizes like 512GB, 1TB etc while the enterprise grade SSD's came in sizes like ...
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68 views

“Boot disk cannot be local attached storage.” in GCP

In GCP, I tried to create a server with a local SSD (because the performance is much better). However, I get the following error: "Boot disk cannot be local attached storage." Surely the answer is "...
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1answer
177 views

Why do my SSD read latency benchmarks get markedly worse when I put an XFS filesystem on top?

I am benchmarking a small server box based on the SuperMicro E300-8D. I've installed the latest CentOS 7.5 with the latest updates, 64GB of DDR4-2100 RAM, and a Samsung 970 EVO 1TB NVMe SSD. The OS ...
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2answers
239 views

How does SSD meta-data corruption on power-loss happen? And can I minimize it?

Note: This is a follow-up question to Is there a way to protect SSD from corruption due to power loss?. I got good info there but it basically centered in three area, "get a UPS", "get better drives",...
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3answers
3k views

Is there a way to protect SSD from corruption due to power loss?

We have a group of consumer terminals that have Linux, a local web server, and PostgreSQL installed. We are getting field reports of machines with problems and upon investigation it seems as if there ...
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1answer
66 views

Intel S3500 need over provisioning in ESXi?

I have 8x Intel DC S3500 SSD's in Raid 10. I am setting up the datastore in ESXi, however I am not sure how much to over provision or if its needed. I know the s3500 are enterprise oriented but not ...
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200 views

Attach SATA SSD to HP DL360 G7

Recently I bought a Samsung SATA SSD and I attached it to the server (HP DL360 G7), As I want to use this drive as a single drive (Not Raid) So I configured the server for Raid 0, But I don't get full ...
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Drive keeps on being unassigned after reboot - B120i Raid Controller

I own a HP DL320e G8 Server. I've disconnected my disc drive, and instead have opted in to install a SSD instead. The SSD is recognised by the system, under the B120i Embedded Raid Controller. I ...
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151 views

SSD performance on Ubuntu + Nginx

I'm trying to improve the performance of server for nginx 100TB/month images distributions. But I have two problems: high CPU load and periodical splashes (I don't know why) Hardware is quite poor (...
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1answer
70 views

My VM instances on Google Cloud Platform do not work after increasing SSD size

Could you please help fix my emergent Google Cloud Platform problem? The configuration information as follow: The VM instances name is “cchatty” Machine type: n1-standard-1 (1 vCPU, 3.75 GB memory) ...
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4answers
109 views

Why does disk latency drop during periods of heavy writes?

Looking at the output of Munin's diskstats plugin (which is reading from /proc/diskstats) I'm noticing what seems peculiar to me. The disk is a SSD, and I would assume, magnetic or solid state, that ...
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1answer
85 views

MySQL perf bad on SSD-based server. Small tables. MySQL config? RAID?

I have a couple of servers in an industrial setting (air-gapped network) that do some fairly light telemetry gathering. We generate about 10GB of telemetry history in ~30 days. All telemetry goes ...
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1answer
561 views

SSD IOPS on linux, DIRECT much faster than buffered, fio

I have a 30Tb-sized hardware RAID-6 system (LSI 9280-8e) of 10 DC-S4500 Intel SSDs that is used for database purposes. The OS Debian 7.11 with 3.2 kernel. The filesystem is XFS mounted with nobarrier ...
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2answers
630 views

Hetzner's installimage script, RAID1 hard drives + SSD

I just purchased a server from Hetzner, with two 4TB hard drives and one 1TB SSD. I want to setup the two hard drives (/dev/sda & /dev/sdb) in RAID1 and install the OS on them, and have the SSD (/...
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1answer
39 views

I want to delete exiting partition on a ssd and then create a partition and then a file system on the same

I want to delete existing partition on an ssd and then create a partition and then a file system on the same. How can I do it using a single command based on fdisk?
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205 views

Strange await times in iostat output

I am seeing strange big numbers as w_await times (like 5 million ms) on a server with 2x SSD in MD RAID1. Scheduler is deadline. OS is Debian 9 with kernel 4.9.65-3+deb9u1. Is this just some sort of ...
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1answer
69 views

GCE Persistent SSD disks allocate more IOPS than specified

I've been testing GCE and created a VM with a persistent SSD disk to test disk performance. Persistent SSD disk that I configured was 37GB, which was supposed to give me 1110 IOPS but when I run ...
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1answer
585 views

RAID 10 with SSDs on LSI 9260-8i has bad performance

I am trying to get a raid 10 running with LSI 9260-8i (IBM M5015) and 4 x Samsung 850 Pro 512GB SSDs. The problem is, that the resulting sequential write performance is really bad (< 100MB/s). ...
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1answer
352 views

Improving SQL speed - Can SSD and more RAM be effective?

I'm running a website on a VPS package on nomral Hard drive, and 3.25 GB RAM. I created a test page and realized that by simply including an SQL command such as: SELECT Name from table where Name IN ...
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2answers
131 views

Difference between hard drives [closed]

I recently purchased an HPE ProLiant DL380 Gen9 Server for my company. This is all new to me and I am trusted to creating my companies IT infrastructure(hired to do software). I'm having a hard time ...