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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14 views

10gig link transfer speed slow between dell chassis m1000e blades

I have a dell chassis m1000e. All blades are connected internally with Dellm8024 10gbit switch. I've SSD on blades. However, when i am testing the speed between the blades the maximum speed size is ...
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1answer
34 views

Show free SSD space after TRIM / UNMAP / Deallocate?

For a hard drive supporting ATA TRIM, SCSI UNMAP, or NVMe Deallocate, is it possible to report on the amount of unallocated space? For example, we take a 1TB drive, then write 500GB data to it, then ...
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2answers
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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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2answers
3k views

Instruct Hetzner installimage to use SSD as primary OS drive

Purchased a dedicated Hetzner server with 2x small SSDs and 2x large HDDs paired with hardware RAID. Running installimage from Rescue OS shows this as config: # Adaptec RAID (LD 0): no name DRIVE1 /...
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2answers
134 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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7answers
7k views

ZFS - zpool ARC cache plus L2ARC benchmarking

I have been doing lots of I/O testing on a ZFS system I will eventually use to serve virtual machines. I thought I would try adding SSD's for use as cache to see how much faster I can get the read ...
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0answers
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Ubuntu expand free disk space after RAID change

maybe someone can advise how to expand free disk space to SDA6 part? Before I have used 2x960GB SSD (Hardware RAID1), now I have added +2x960GB SSD and made Hardware RAID10 (1+0). Problem is now that ...
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1answer
49 views

SAS3 HBA / Backplane Issue

I have the Supermicro BPN-SAS3-743A backplane hooked up to a AOC-S3008L-L8i RAID card in IT mode using a regular mini SAS SFF-8643 to SFF-8643 cable bought from Amazon. When I'm in the HBA bios, the ...
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2answers
2k views

Server freezes randomly for a few seconds

I am noticing a weird issue, my Ubuntu (web)server randomly freezes, for a few seconds and afterwards recovering again. The server has the following specifications; - 2 vCores of 2,4 GHz - 8GB of ...
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1answer
1k views

IO-intensive processes hang with iowait, but no activity going on

I have a bunch of IO-intensive jobs, and to boost performance, I just installed two SSDs in a compute server, one as a scratch file system, one as swap. After running for some time, all my processes ...
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5answers
2k views

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=...
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1answer
2k views

Slow disk performance on PowerEdge R720

Every few months PowerEdge with SSD (INTEL SSDSA2BW60) comes with results like: hdparm -tT /dev/sda /dev/sda: Timing cached reads: 690 MB in 2.00 seconds = 344.84 MB/sec Timing buffered disk ...
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5answers
143 views

Raid 1 default disk capacity is lesser than the disk sizes. Any ideas? Intel Raid Storage Technology - Raid from Bios

Here the screenshots I think they explains everything The disks are advertised as 1 TB and the real size of the disks are 931.5 GB I have installed windows server without raid setup for ...
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0answers
72 views

HP ProLiant DL380 G7 (P410i) compatible drives

I have recently been looking to do an upgrade on my server recently by upgrading to using SSDs (2.5 inch). I have done a lot of late night googling and have found that many drives have an issue with ...
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4answers
550 views

Moving to SSD storage from Platters: Where does RAID come in?

When moving to SSD, do you keep RAID10? We have a server with internal SAS disks in a big array: 16x600GB RAID 10 This gives us ~4.6TB of storage. It is fast (this is SQL Server). Our SQL ...
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8answers
12k views

Understanding NVMe storage and hardware requirements

I'm a bit confused about the recent developments in PCIe-based storage, particularly as it relates to the NVMe specification and its hardware compatibility. While I've worked extensively with SSDs in ...
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1answer
2k views

SSD cache for ISCSI block mode drives possible?

I have Debian based Openmediavault 3.0 distribution with iscsi plugin based on ietd. Among others, I use it to serve several disks as ISCSI block mode for VMWare servers. It works, however it is ...
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3answers
315 views

How to overprovision an SSD for holding a smaller ZFS volume (ZVOL)?

I have a pair of 480 GB "Datacenter" SSDs (SAMSUNG MZ7LM480HMHQ-00005) that will make up a ZFS pool in a mirroring configuration. The pool's only content will be a ZFS volume (ZVOL) for a virtual ...
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1answer
79 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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24 views

Server constantly crashing under load, are my SSDs failing?

My system is locking up constantly under load, and this pops up in the journal during each reboot: May 02 21:24:34 fred smartd[1590]: Device: /dev/sdb [SAT], SMART Prefailure Attribute: 3 Spin_Up_Time ...
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1answer
4k views

Ceph hardware sizing calculator

I would like to calculate the Hardware sizing for a ceph cluster. There are so few references to the sizing, that I try to get these details here in the community. E.g. what shall i have depending on ...
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1answer
907 views

Dell t430 very loud fan noise with pcie ssd

I have new server Dell t430 2 xenon e5-2640v3 64gb ram, 2x 1TB samsung evo 850 ssd and 2x Intel PCIE p3500 400gb ssd. When I installed Intel PCIe ssd server fan ramp up to 80% and is very loud. I ...
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1answer
54 views

Hyper-V on Server 2019 - the larger the VHDX file the slower the disk speed

We have a brand new pair of servers for Hyper-V with fast RAID 10 SSDs in 2 arrays. On the host, using Crystal Disk Mark, I get speeds that I would expect like RND64K Q32T12 = 4712.49 MB/S while the ...
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1answer
30 views

How to setup SSD's in RAID 5 on a MSA2060?

In the near future we want to replace our current MSA2050 with SAS disks to a MSA2060 with 10 SSD disks (HPE, 960GB each). We are going to use RAID 5. Since RAID 5 can go up to 16 disks, we can make 1 ...
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9answers
21k views

Home-brew automatic tiered storage solutions with Linux? (Memory -> SSD -> HDD -> remote storage)

Related to this question about using an SSD for system and HDD for data, except I would like my system to do this automatically... Is it possible to have several layers of storage and push items ...
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1answer
162 views

Using two SSDs for Hot-Warm-Cold Caching a HDD on Linux

I currently have a debian-based Linux system that I'd like to optimize heavily. This machine has three different drives: An SLC SSD, a QLC SSD, and a 4TB HDD. I wanted to know if it was possible to ...
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4answers
19k views

How to measure total writes performed to SSD in Linux?

I've searched the internet to find a tool/utility which can tell me the total writes performed to an SSD (or a normal disk). The output should look something like this: SSD Intel 320S :- Total data ...
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1answer
79 views

Does IO performance degrade when a SAS SSD is attached with redundancy?

I have some Seagate Nytro SSDs (model xs800le70004), SuperMicro SAS3 JBODs (2C models with redundancy), LSI 9300 SAS3 Cards, and SAS HD Cables (SFF-8644). When the SSDs are attached with both primary ...
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7answers
60k views

Third-party SSD solutions in ProLiant Gen8 servers

I was wondering if anyone had any specific experience using Intel DC3700 SSDs (or similar) in the HP (DL380p) Gen8 servers? I'm upgrading a set of database servers that use direct-attached storage. ...
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0answers
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ext4fs: Adding multiple flash storage (SSD) into one LVM volume (one at a time) + resizefs: Is it friendly for the flash storage

In the said use case as the title: The scenario to be, for example: In the beginning, I had one SSD drive with ext4fs, then after the storage was not sufficient, I added another drive by LVM + ...
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1answer
39 views

bcache fails to attach local ssd as caching device in google cloud

I'm trying to setup bcache in an instance in google cloud using a raid of local SSDs as caching device but everything fails in the attach phase of the process. For testing purposes I created a new ...
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2answers
84 views

HP P440/2gb RAID controller with Samsung pm1643 for production environment

I'm planning to buy two refurbished servers to run as HA hypervisors. I've found DL380p G9 which features a P440/2gb RAID controller. I also found some new Samsung pm1643 SSDs in very competitive ...
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1answer
117 views

Ceph with mainstream (desktop) SSDs?

I am searching for an answer about using SSDs drivers, which are build for the mainstream. Afaik ceph uses for its marketing to buy cheap disks for entprise ready storages. But I cannot find any ...
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0answers
22 views

Find errors on HDD, RAID, SSD, NVME with one program

Is there a software that can automatically find errors and failed disks, on any of these types of storage: mechanical HDD flash-storage like USB-sticks or SD-cards RAID SSD NVME I'm working with a ...
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2answers
11k views

Linux SSD as HDD cache

I have a Linux server system installed on an SSD and an HDD for user data. As there is space left on the SSD, I want to use it as a read cache for the HDD. Looking at the possibilities, I found: dm-...
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1answer
1k views

Slow SSD performance - IBM X3650 M4 (7915)

I set up a test environment for development purposes. It consists of a IBM X3650 M4 (7915) server with: 2 x Intel Xeon E2690 @ 2.90GHz 96GB 1333MHz ECC RAM 2 x HDD 146GB 15k rpm 6 x SSD 525GB (...
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1answer
40 views

Is there a benefit to having SSD for OS and spinning disk for VM's

Just about to rebuild a small server which would typically be a couple of 4TB spinning disks in RAID1 to hold the OS and the VM's, for 4TB (x2) the cost is still quite high for all out SSD, but I was ...
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2answers
7k views

Why do sequential writes have better performance than random writes on SSDs?

An LBA (logical block addresses) is a mapping table implemented in the FTL to match between logical and physical pages/blocks in SSDs, my guess is that most SSDs (at least when they are empty) keeps ...
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1answer
605 views

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 ...
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0answers
41 views

MegaRAID: New SSDs blink red

Last week I installed two new SSDs for a customer. It's an Server 2016 Standard Core with Intel Xeon @ 3.70 GHz, 4x32GB RAM and LSI RAID-Controller 9341-8i. I created a RAID 1 with 2x1TB SSDs via ...
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2answers
544 views

Plextor SSDs don't work reliably in HP DL380p Gen8 servers

We recently purchased a few HP 380p G8 servers to add some VM capacity, and decided to add a pool of SSDs to our standard build, to create a "fast" RAID 1+0 array for some of our VMs that have higher ...
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2answers
4k views

Proliant ML310e Gen8 Smart Array Predicted Failure Issue with SSD

This is a question related to this one: Third-party SSD solutions in ProLiant Gen8 servers but not covered by the question or the answers. I have an OCZ 120 gig SSD as system drive on a Proliant ...
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3answers
2k views

clone nvme drive with 4096 sector size to ssd with 512 sector size

I have an nvme drive with a logical and physical sector size of 4096. The block size of this drive as reported by blockdev --getbsz command to be 4096 as well. The destination drive is an SSD with a ...
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1answer
123 views

md raid5 extremely slow on discard

Hi all md raid experts Running Centos 8 (with all latest updates, kernel 4.18.0-240.1.1.el8_3.x86_64) where I have 3x2T Samsung SSD 860 QVO 2TB in raid5 (to be used as base for some KVM VMs) and when ...
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0answers
180 views

preventing big HDD's to spinup by using (small) SSD's as cache

I want to build a NAS that is as quiet, efficient and cool as possible. In this scenario, I have the following parts: -4 SATA connections to the motherboard. -2 Hard drives, one is 1TB, the other is ...
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3answers
4k 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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0answers
100 views

Benchmarking ssd MySQL write performance: sysbench oltp_write_only vs write iops, fio. Madness

I've benchmarked about 10 diffrent ssd devices with sysbench oltp_write_only.lua and I found no coroleation whatsoever between max sustained write IOPS of device (both from specification and from fio -...
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1answer
639 views

Do I need to replace my NVME SSD?

I have a simple server setup: 2 NVME SSD disks (both SAMSUNG MZVLB1T0HALR-00000 for 1TB) united into RAID0. OS Ubuntu 19.04 Today my system stopped responding. Reboot didn't help. I connected via KVM ...
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2answers
451 views

Hyper-V Server SSD vs NVME M.2

I'm quite novice on setting up servers and VMs and I'm trying to setup a simple PC to act up as a server in an office. The requirements are low but I think this is a good opportunity for me to learn ...
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1answer
28 views

Since VFRC feature in VMware is now end of lifed, what can I replace it with?

Now that VFRC (vflash read cache) is end of lifed in Vsphere 7, does anyone have suggestions on what I could replace it with. Looks like there is only Infinio and Virtunet in the market now, has ...

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