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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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Single Device of VolumeGroup randomly written with 4K's

Hopefully this is an answerable question... Imagine following Hardware-Environment: VEEAM (5.5) with SSD ONLY LUNS Serveral Virtual Disks REDHAT 7.3 x (more than 2) Disks as VolumeGroup LUKS-Device ...
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1answer
32 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
23 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
13 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
46 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
118 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
26 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
90 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
36 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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1answer
47 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
156 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
141 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
2k 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
57 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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76 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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55 views

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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74 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
53 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
100 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
52 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
247 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
259 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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129 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
53 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
367 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
236 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 ...
3
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2answers
125 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 ...
2
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1answer
304 views

HP DL360 Gen9 - Boot from PCIe SSD?

We've been using SATA (ADATA or Transcend 2,5" SSD's), but a much neater solution would be to use a PCIe SSD (M.2 SSD + PCIe adapter). We've tried M.2 WD Green SSD's as wel as M.2 Kingston SSD's. ...
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1answer
77 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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1answer
89 views

Can I move from SAS HDD to SSD?

I have an HP ML350 Gen 8 server with 8 SAS HDDs of 600 GB each. Since the drives are a little bit old now, I would like to replace them with SSDs. I would like to know if I can do this, and if I ...
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2answers
289 views

Dell R610, Perc 6/i SSD SATA drive slow speed

Before buying an SSD for the server I've tried to use SSD from my notebook: SSD disk (TRANSCEND 2.5" SSD370S 128 gb SATA III MLC TS128GSSD370S) has speed at my notebook 350-400 MB/s. I installed it ...
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1answer
188 views

SSD Wear_Leveling_Count = 17

I have just checked my SSD drive (Samsung SSD 750 EVO 120GB) with smartctl. The result is: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 5 ...
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0answers
142 views

High i/o wait on 6 x SSD RAID 5 (KVM Virtualisation on Ubuntu)

I believe this is simply a case of a bad idea using RAID 5 in this situation, but I would like to see if I have missed something else. Hardware: 6 x Samsung PM863 1TB or Samsung 850 Pro 1TB in RAID ...
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0answers
34 views

Why do I have very different read speeds at the same SSD?

In a Debian stretch, I did some quick tests for a 500GB Samsung SSD 840 read speed at all the different partitions and I cannot understand the results. My understanding so far was that the disk could ...
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2answers
569 views

Qemu TRIM and discard on a physical SSD device

I am running Windows 7 in a Qemu/KVM with a passed through GPU which I use for work-related stuff. I recently got fed up by it's unprecedented slowness due to it running off a mechanical drive, so I ...
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1answer
69 views

Repurpose a used SSD - how to TRIM it?

I am going to put a used SSD into a server to boot from it and hold the OS itself, while making a RAID1 from two other HDDs. Since the SSD has been used, do I need to trim it beforehand and how? Or ...
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4answers
2k 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
223 views

DL380p G8 SSD cache

I have HP DL380p G8 with smart array P421i. I would like to use SSD cache for my HDDs RAID 10 volume. I got know I have to buy a SmartCache license for the array and I found some weird info about the ...
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1answer
310 views

Low random read IOPS intel dc s4500

i have very bad read performance on my new intel ssd. My configuration is: HP proliant DL360e gen8 with Smart Array P222 controler. Intel ssd dc s4500 960GB 64GB ram 2x Intel cpu I have 2x SAS HDD ...
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2answers
587 views

PERC, Caching with SSDs

We have a few servers with PERC H710s, we're moving to SSDs and I wonder, is caching needed given that we're not using spinning disks? Our general setup is as follows 2 X 2TB SSD in RAID 1 Read ...
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1answer
53 views

In my ZFS box, why is my cache devices leaving a bunch of free space?

I have a ZFS system serving many VMs. In it, we installed 12x4TB SAS disks and configured them in a mirror. We added two PCI-E SSDs (Samsung 960s with 512GB each), but they are each consumed to just ...
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0answers
210 views

Linux dm-crypt slowness with fast SSD

I'm experiencing slowness with an encrypted filesystem. Here are the details: # /dev/sdd: TOSHIBA PX05SVQ192B AX02 /dev/sdd # gdisk -l /dev/sdd GPT fdisk (gdisk) version 0.7.1 Partition ...
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1answer
53 views

Mixing mdadm RAID with partially power loss protected SSDs

I have created a mdadm RAID 10 with 4 SSDs. 2 of those SSDs are consumer models and does not have the power loss data protection feature. At the RAID creation i have put 1 SSD with power protection ...
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2answers
460 views

ESXi 6.0 with HDD RAID 5 and a separate SSD disk: where to install ESXi itself

Actually, it is a satellite for this question: ESXi: unable to mark SSD drive as SSD, but I just thought I would raise a separate question, since this question is not related to the error I bumped ...
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0answers
229 views

Are SSD/HDD hybrid drives a good choice as drives in either BRTFS or md raid?

I'm currently planning to revamp a "computer". Using the term "computer" because I'm not sure what it's role exactly is... It runs Ubuntu (17.10 / artful), it's being used as multi-seat desktop for ...
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8answers
10k views

Does bigger capacity SSD have longer life due to wear leveling?

I have been told that you can get a longer lifespan of an SSD if you buy a bigger capacity SSD. The reasoning goes that newer SSDs have wear leveling and thus should sustain the same amount of writing ...
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1answer
96 views

SSD Raid perfomance

Disks: 10xSSD Ultrastar SS200 960GB 12GB/s Raid 0, 6, 10. Controller: LSI Syncro 9380-8e Filesystem: ext4 without LVM System: Centos 7 2x E5620 @ 2.40GHz 32GB RAM fio-2.1.10: --iodepth=32 --ioengine=...
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35 views

DOM module on Supermicro platform causes I/O errors, but completelyresurrects after power on/off

There is an Supermicro X9DRT-F platform with DOM module SSD-DM032-SMCMVN1. Periodically Linux starts to report multiple messages into dmesg: blk_update_request: I/O error, dev sda, sector .. At ...
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2answers
112 views

Moving Ubuntu VM to SSD

I decided to move my VM from A4_V2 to D11_V2 Promo because the D11_V2 offers SSD. However when I moved the VM, I don't see any difference in Azure Portal when I'm checking the disk: Type STANDARD ...