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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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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HP DL 360 Gen 10 with WD RED SSD Drives?

We have an HP DL 360 Gen 10 and we are looking at replacing the drives with 3 WD Red SA500 WDS400T1R0A 4TB SSD 2.5 inch SATA SSD Drive in a RAID 5 configuration. I have pasted the detail of the disk ...
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Linux “most fast” SSD filesystem or configs if we don't care about data integrity?

When it comes to squeezing maximum efficiency of big[1] file read/write speeds out of ~4 SSDs RAID-0d[3] together, is there a "best"? I've been reading up on the tests between ext4, tune2fs -...
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Why are random reads on NVME SSD slower than sequential reads?

NVME flash SSDs can operate on data in parallel. So why is it that random IO is still slower than sequential IO on SSDs?
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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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25 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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1answer
64 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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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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26 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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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
30 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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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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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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38 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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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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346 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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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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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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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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277 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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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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SSD I/O slows down system

My HDD was getting full, so I added a new SSD and tried moving files to it. For some reason, this bogs down the whole system to the point where it's not usable. This never happened with HDDs when ...
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47 views

Do unused SSDs degrade over time?

I have a spare SSD which I keep at home in case one breaks. I've seen articles about SSDs losing data over time even if they are not being used, but can unused/empty SSDs degrade over time too? (and ...
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What is the overhead of ZFS RAIDz1/2 in HPC SSD Environment?

Example hardware / host: Modern 64 Core CPU, 128GB Memory 8 x Micron Pro 15.36TB u.2 SSDs SSDs connected by dedicated Oculink per device (no backplane or PCIe sharing) Ubuntu 20.04 Use case: A ...
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868 views

S.M.A.R.T. lifetime hours resetting to zero

I use S.M.A.R.T. selftest to test all of my hard drives and SSDs. I run a short test daily and a long test monthly. One of my SSD is showing odd behavior in that the lifetime hours seem to reset back ...
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123 views

Latency in fio vs ioping

There are two tests: ioping -c 10 -S 4K -D . 9 requests completed in 2.49 ms, 36 KiB read, 3.61 k iops, 14.1 MiB/s generated 10 requests in 9.00 s, 40 KiB, 1 iops, 4.44 KiB/s min/avg/max/mdev = 259.5 ...
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SSD - split Virtual Machines and Data or both on same SSD?

Is there any benefit in keeping Virtual Machines and Data on two different SSDs? Just thinking about the wear from the writes to the Virtual Machines being much higher than for the Data partition. ...
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NGINX directio is not working (O_DIRECT flag in open(2) sys call )

Nginx configuration is location /conent/ { directio 200k; directio_alignment 4k; } Using SSD with ext4 file system with 4k block size, and journaling has been disabled, linux kernal version is 5.4., ...
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Tmpfs vs NVME SSDs from performance POV [duplicate]

I have a script that creates large temporary files. I'm inclined to use tmpfs for this, however I did a quick search for tmpfs performance and found this which reports speed as about 2GiB/s. Modern ...
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Upgrading Intel DC S3500 HP OEM firmware without Windows Server?

I have a second hand 800GB SSD Intel DC S3500 series (Model VK0800GDJYA). The Intel DC S3500 series suffers from the 8MB bug if the firmware is not updated: the capacity of the SSD suddenly fells to ...
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Does `docker run --rm cli_command` destroy SSDs via constant writing?

I am running several PHP CLI apps (phpcs, phpunit, phpstan, to name a few) via docker run -it --rm against several hundred thousand packages. This means an equivalent of millions of docker runs over ...
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249 views

Use QLC SSDs as RAIDZ (scientific archive)?

We are building a system for the archival and scientific analysis of some weather data. The setup is redundant, with two HP DL580, Proxmox (ZoL) and some GPUs for analysis. On each server we plan 5 ...
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Electrical compatibility of SFF-8643 for U.2 SSDs

I notice a lot of U.2 adapters on sale, seem to show what looks like a U.2 to SFF-8643 cable, or SFF-8643 PCIe connector/adapter, instead of the expected U.2 to SFF-8639 cable or SFF-8639 PCIe ...
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3ware: controller won't see disk after swap

i have 3ware controller i tried to change disk(Sandisk SSD) in RAID 1, but it wont detect new disk. I've checked both controller and disk and they are fine separately. Do you guys have any idea what ...
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1answer
105 views

Troubleshooting frozen disk when queue is full

I have a system (centos 7.8) with k8s installed on top. After a few days of normal operations (system load is ~30% and disk activity is around 60 iops, not saturated), the system goes to an unstable ...
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94 views

On modern Linux, is it safe, or is it a bad idea to move all active writes of the OS to other disks?

I've been using SSDs long enough now to think about protecting them from premature failure due to excessive writes. So, I've already moved /var to other disks successfully (be they other SSDs or HDDs) ...
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1answer
66 views

How to verify if a disk was ever written to

How can you verify if a disk is fresh and has had no write from the factory? I have a client that needs to make sure that the disks he revived are cleaned and weren't tampered with from the time it ...
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1answer
47 views

Resetting SMART on an SSD (hours powered on)

We've been bitten by a known issue on SanDisk SSDs (Dell or HPE branded) where they hard fail after a certain number of hours powered on - 32768 or 40000 depending on the specific model. Is there a ...
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1answer
64 views

Memory Running Low - VM Swapfile vs Host Cache

I have server running a VMware 5.5 hosting 3 VMs which are using all memory of my server. I've just added a 120GB SSD but I don't know what tool to use it to smooth performance a bit. Swapfile or host ...
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1answer
58 views

Very bad write speed on mdadm RAID1 with SSDs

I have two Samsung 860 QVO in RAID1 with mdadm. The write speed of a single disc is around 450MB/s. I reach a maximum of 70MB/s on the RAID 1. The reading speed is normal. xfs is used as the file ...
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What is more stressful for an SSD drive, a RAID-1 sync or multiple OS and software installations?

I was wondering recently, what is more stressful for an SSD drive in a RAID-1 array, a RAID sync or multiple installations of OSes and software. Say for example that you have a new server with empty ...
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488 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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ML350p Gen8 with non HP SSD

I have a HP ML350p Gen8 which I am looking to upgrade. I have seen this Kingston data centre SSD: DC500 2.5" Enterprise SSD - 6GBps SATA SSD for Read-Centric and Mixed-Use Drives https://www....
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Repeatedly run fstrim doesn't seem to work

When I run fstrim --all -v a few times in a row it doesn't seem to be working as expected. Every time it reports that it processes the same number of bytes: root@pc:~# fstrim --all -v /boot/efi: 503.2 ...
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826 views

Can't open /dev/sda1 exclusively. Mounted filesystem? [duplicate]

I'm aware that there are a lot of similar questions about this, I have tried following through the responses but nothing has helped. I'm more than happy to post more logs if needed. The end goal: Have ...
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DL360 gen7 + 2 SSD Raid 10 crashing and amber lighting nonstop - it works fine with 2 SAS HDD

Thats it pretty much, I have this recently acquired DL360 with 2 300gb SAS HDDs. Every thing works fine with them in RAID 10: no crashes, no sudden amber lights, no amber lights after every reboot, no ...
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231 views

Cache SSD shutdown data loss

Most SSD have a cache to provide fast write speed. But what happens when I shutdown the computer with full cache? Is that cache volatile? How fast ist the cache processed and persisted? Do I need to ...
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Swapping out a HP H240 host bus adapter to a P420?

Does anyone know if it is possible to keep the current raid configuration if swapping from the H240? It's currently running raid1+0 with 4xSSD's and I've noticed the poor write performance compared ...
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222 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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63 views

Support on 3rd party SSDs for Lenovo ThinkSystems

I was wondering if there are any problems on using third-party NVMe-SSDs (e.g. Samsung 970) in a Lenovo ThinkSystem?

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