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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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iostat reports significantly different '%util' and 'await' for two identical disks in mdadm RAID1

I have a server running CentOS 6 with two Crucial M500 SSDs configured in mdadm RAID1. This server is also virtualized with Xen. Recently, I started seeing iowait percentages creep up in the top -c stats of our production VM. I decided to…
Elliot B.
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Questions regarding PostgreSQL virtualization

I have not experience on planning PostgreSQL on virtualized nor physical server environments so I need to get some advice how to do things correctly. We have two identical servers and we need to make the solution for virtualized PostgreSQL and App…
circle
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Intermittent I/O delays on part of RAID array causing poor MySQL performance

I am managing a bare-metal server running a MySQL database as well as some other software. We are seeing performance issues with some MySQL queries, but the issues occur intermittently, and almost exclusively affect UPDATE queries. As an example, I…
jnorthco
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Raw Read Error Rate for Intel SSDs

I've provisioned a few servers with a bunch of Intel S3610's and I'm a bit concerned about the "Raw Read Error Rate" values. The tools shows all drives as healthy and there are no other errors as shown as full SMART data pasted below for one…
ispirto
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"UNMAP not supported" error on a device that supports UNMAP

I was playing with trim/unmap commands on a Samsung SSD (MZ7WD240 model). To check the unmap support on this device i ran the following command: hdparm -I /dev/sda | grep TRIM And as expected the output shows that my device /dev/sda supports…
SamTh3D3v
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SSD: Raid 5 vs. Raid 1 (SSD lifetime). Is Raid 5 with SSDs really bad?

I want to create a 1 TB Raid array with SSDs. I think about using Raid 5 or Raid 1. I've read a lot of articles regarding SSD in Raid 5, i.e. What are the main points to avoid RAID5 with SSD? . Most answers are "don't use SSDs with Raid 5, Raid 5…
Mr. Digit
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Raid 10 to SSD's or not?

I have R620 server. I have that disks: 4x512GB Samsung SSD 4x1TB Seagate ES.2 HDD I will use Vmware Esxi to create virtual machines. What's the best option? Using SSD's as primary drives and use them at RAID10 or using HDD's with RAID10? I will…
Murat G
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How to calculate /get the UBER value from S.M.A.R.T measurements in SSDs

UBER is a metric for the rate of occurrence of data errors, equal to the number of data errors per bits read over the entire lifetime of an SSD. Mathematically: The numerator is the total count of data errors detected over the full TBW rating. How…
SamTh3D3v
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MongoDB with NVMe SSD

Does anyone have recommendations on the RAID configuration when running MongoDB on NVMe SSDs? Is the best practice still RAID10 like with HDDs and SATA SSDs? Thanks.
Dan
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Microsoft Azure's SSD are too slow

We are running ElasticSearch on several Azure D12v2 instances, on Centos7. While indexing data, machines' IO seems to be quite poor, dancing between 3MB and 15MB per second, which is blatantly slow for SSD storage. --…
Navarro
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Can I install SQL Server on an external Hard Disk?

I have a desktop PC (Windows 7) with 1 TB HDD which has SQL Server 2008 R2 installed. Now it is getting replaced by a laptop with 500G SSD drive. This would be first experience working with a SSD. But I have been told not to install SQL Server 2008…
srh
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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 RAM - 40GB SSD - 100 MBit network I am mainly…
Rick
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Intel server board s2600cw2r boot from nvme?

I have upgraded BIOS to 19 for supporting efi boot, but I can't see my nvme ssd in the boot manager yet.
user219031
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RAID Controller - SSD is listed, but not available in Windows

This is the PowerEdge Expandable RAID Controller von LSI Corp. There are 5 HDD running in a raid 5 and raid 1. The SSD isnt supposed to be in any RAID activies, I just want it to pass through and show up in Windows. Its not listed in disc management…
Yama
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SSD hardware RAID as local VMWARE datastore

i plan to buy a new ESXi VSphere Server with a LSI Megaraid Controller and 8 x Intel S3520 SSDs. Hypervisor should be started from USB-Flashdrive Hardware RAID10 containing 8 x Intel S3520 SSDs RAID10-set should be formatted as Datastore containing…
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