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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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Running zfs trim twice on the same pool still takes forever the second time

I have this ZFS pool consisting of two mirrored 1TB Samsung 870 QVO drives, that I've been using for about a year for storing bhyve guest images as ZVOLs. During that time, I've created / messed with / destroyed numerous VM instances; this pool has…
xbug
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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 I do something that involves discard it's not…
lpaseen
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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 900GB -2 SSD’s, one is 220GB, the other is…
Cedric
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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 state where nothing is commited to disk anymore.…
Laurentiu Soica
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How does Azure handle TEMPDB on the local SSD when using WSFC to support an always on availability group?

How does Azure handle TEMPDB on the local SSD (drive D:) when using WSFC to support an always on availability group? I know that the local SSD, where it's recommended to place TEMPDB, is erased during restart... and that a PowerShell script is used…
Gabe Green
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How to derive bytes written from SMART's host_write_commands?

Using either smartctl 7.0 or nvme 1.7, I get the following data from the SMART log data_units_written : 350,371,149 host_write_commands : 2,974,115,785 Via smartctl, the first line also shows [179 TB], which is…
Gaia
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HP Proliant DL360 G9 with Samsung 983 DCT

I have a HP Proliant DL360 G9 (with P440ar storage controller). I would like to know whether it is possible to connect NVMe U.2 SSD? The SSD I was thinking about is Samsung 983 DCT. I'm not sure how to determine whether the controller supports U.2.…
Bob dylan
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Best Practices for Deploying Microsoft SQL Server on AWS on EC2 instance with SSD storage

Does it makes sense to install SQL Server 2017 on one single SSD drive on m5.xlarge with tempdbs, databases, program files, backups and logs for best performance? According to Amazon EBS specs the bigger SSD drive the better IOPS…
mikesv
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Windows Server guest changes and ramifications after being migrated to SSD?

This particular environment, it's VMWare guests that have been moved to all-flash SAN, but that shouldn't be particularly relevant. I'm quite familiar with >winsat formal from SO questions like this one to get Windows to re-test the OS disk.…
Orangutech
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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 (if it were an HDD) I would dd if=/dev/zero…
fadedbee
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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 are progressively slower than the first run. Here…
Saurabh Nanda
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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 and the other at ~95% utilisation? Shouldn't they…
Saurabh Nanda
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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 for zookeeper but on confluent , we can see that…
shalom
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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: fio dd hdparm The operating system is CentOS7 and…
Sinai
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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 boot device. I expected that the MBR just hadn't been…
Charleh
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