Solid-state drive refers to a data storage device that uses solid-state memory to store its persistent data.

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SSD fstrim on CentOS 6.x with software raid5

I have some CentOS 6.x servers. They have software raid1 and fstrim works well there. On one of the servers, I decided to do software raid5 and ext4. I can mount it with discard and there is no error ...
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0answers
22 views

Disorganized disks because of different disk technologies - LVM an answer?

I have a 1 TB spinning HD, and a 256 GB SSD. I keep my OS and large projects on the SSD, for speed. The rest is on the spinning HD, because of its size. The problem: This means I have things to ...
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1answer
39 views

Selecting an SSD to act as boot volume in an HP server

A question I recently asked regarding the use of enterprise 10k vs. 7.2k midline SAS disks led to some suggestions that the use of a mirrored pair of SSDs as a boot volume can make sense because: ...
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53 views

XenServer 6.2 VM Performance (SSD, RAID-10, Quad-core)

Greetings everyone :) My configuration is the following: HP C3000 tower enclosure 1st HP Proliant BL460 G1 quad core xeon 2.66GHz 12MB L2 cache, 24GB RAM, BIOS I15 5/2/2011 partnered with HP ...
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19 views

Owc Mercury vs Samsung 850PRO in HP g7

i am considering putting consumer grade SSDs in my webserver. I have tested the writes, and it seems like, i get ~ 25Gb writes /day on the current disks. My G7 has a P421 controller. Would it make ...
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2answers
70 views

Acceptable I/O speeds for 6 x 250GB SSDs in RAID 10

I'm running CentOS 7 (XFS filesystem) on a dell server with a PERC H700 raid controller. Inside this server I have 6 x Samsung 850 Evo 250GB SSDs (yes they are consumer drives however, this is a home ...
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1answer
101 views

Are HDD <-> SSD transfer speeds completely bottlenecked by HDD speed? [closed]

Is transferring data from an SSD to HDD and HDD to SSD speed about the same as HDD to HDD speed for both ways?
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1answer
52 views

Are bcache and/or dm-cache considered stable for production in 2016?

I would like to use linux SSD caching (dm-cache or bcache) with Debian Jessie production servers. (kernel 3.16) My question: Are dm-cache and bcache modules reliables in linux 3.16 ? Do I need to ...
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1answer
22 views

ServeRaid M5210 high temperature

I have a serveraid M5210 card on X3650 m5 (raid10) And a M5110e raid card on X3650 m4 Both raid card is high temperature (70-75 C) images: http://i.imgur.com/oa2O7ba.png ...
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1answer
30 views

Using Samsung 850 PRO on Lenovo System with hardware raid (e.g. x3100 M5 5457EHG) [closed]

Having made quite a market research (price, location, availability, specs) i ended up choosing Lenovo System x3100 M5 combined with two Samsung 850 PRO Series 1TB to be set on a raid 1. Now before i ...
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43 views

SSD Raid 10 Slow write speeds

We have three IBM servers running windows 2012, all identical, they have a Raid (10) of SSD's. However one of the boxes seems to only be able to write at a third of the speed of the others. The other ...
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1answer
41 views

How best to utilize two SSD disks on VPS webserver [duplicate]

I would like to ask you about your opinions how to utilize two SSD disks on webserver.. I read many articles about raid, disk mounting, lvm, disk cache, etc. but still I am not sure how to decide ...
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1answer
35 views

Copy centos 6 modify mdadm raid 1 and clone to new mdadm raid 1 ssd

I have: Centos 6.7 grub-install -v grub-install (GNU GRUB 0.97) lsblk two new SSD 128gb Live usb with Parted_Magic_2015.03.06 /boot/grub/device.map # this device map was generated by ...
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1answer
112 views

Precision T5810 Workstation and INTEL SSD Series 750

I'm trying to spec out a Precision T5810 Workstation and install a INTEL SSD Series 750 drive in it. According to the top rated review at ...
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1answer
116 views

TRIM Support in PERC H310 Mini

I am running Debian 8 on a Dell PowerEdge R420. The OS is installed onto a INTEL SSDSC2BA800G3T SSD running the 5DV1DL03 firmware. The SSD is connected through a PERC - H310 RAID controller (fw ...
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2answers
37 views

80 pin SCSI Raid Controller to SATA SSD's on IBM e336

I have an Old IBM e336 1U Sever. Currently the only Hard drive in the system is a Ultra160 SCSI drive. This drive is old and making some noises indicating that its life is going to end soon. Though ...
2
votes
1answer
107 views

NVMe speed degradation after kernel upgrade

We are testing the speed of two Intel DC P3600 NVMe drives on a CentOS 7.1 system. They are configured in a software RAID1 using mdadm. After upgrading the kernel from the (very old) 3.10 to the ...
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2answers
51 views

Does the max-80%-use target suggested for ZFS for performance reasons apply to SSD-backed pools?

The Solaris ZFS Best Practices Guide recommends keeping ZFS pool utilization below 80% for best performance: Keep pool space under 80% utilization to maintain pool performance. Currently, pool ...
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1answer
54 views

How to disable automatic garbage collection on an SSD?

Solid State Drives (SSD) have a garbage collection functionality which makes space from deleted files available. It is triggered automatically by the drive via a TRIM command sent by the OS Is ...
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1answer
168 views

How is LSI FastPath different from Software RAID?

This question pertains to SSDs on RAID levels without parity (like RAID 0, 1, 10). The recommended settings for FastPath are to set the Write Policy to Write Through, Read Policy to No Read Ahead and ...
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1answer
97 views

EBS vs SSD definition

I am confused about the EBS and SSD choice while creating an instance . while choosing instance parameters (Step 2) you will see 2 options in the column Instance Storage (GB) : EBS only or SSD . ...
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2answers
58 views

Hyper-V Cluster on SAN + SSD Local Storage

I wanted to know if there are any methods that anyone has done with the following: All of my servers on the hyper-v cluster are stored on the SANS. I have a desire to have the speed of SSD on two of ...
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1answer
21 views

AHCI - Will be two HDDs (SSDs) two times faster?

Lets take common numbers: SATA HDD - 120Mb/s read, write speed heavily depends on gaps in sequence SATA SSD - 550Mb/s read, 500Mb/s write PCIe SSD - 2500Mb/s read, 1500Mb/s write Lets assume they ...
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1answer
84 views

Is it really necessary to use fstrim on Samsung SM843T SSDs?

Should we schedule periodical fstrims on Samsung SSD drives? What happens if we don't run such periodical scripts? I am highlighting the model on the Title because I am assuming that the answer is ...
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145 views

LSI 9207-8i and Samsung 850 PRO TRIM support

A Dell R610 server with LSI 9207-8i HBA card has 6 Samsung 850 PRO SSDs connected to it. hdparm shows TRIM support: sudo hdparm -I /dev/sdc | grep -i trim * Data Set Management TRIM ...
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1answer
88 views

Imaging a PC from the Network using MDT

I have been googling around all day trying to figure out what the best approach to this is, or if there even is one. Goal - Quickly image a PC from our Network. Current Setup - Currently, we have ...
2
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1answer
636 views

Why is my Azure VM (D3) Disk I/O crazy slow?

I have setup a D3 VM running Windows 10 on my Azure account. Unfortunately the Disk speed, on both the C (200GB) and D (100GB Temp) are EXTREMELY low. Less than 1MB/s when viewed through Task ...
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112 views

Tuning mdadm RAID 5 performance?

I have a system with dual Intel E5-2620 v3 @ 2.40GHz, 64 GB ram, an LSI 3008 HBA, 8x 1.6 TB Intel S3510 SSDs. I've been playing benchmarking it in different configurations using fio and I've gotten ...
3
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1answer
43 views

Web-server SSD upgrade: will partial fs switch do?

We had a dedicated server with Hetzner. Once our ecommerce instance got 350+ concurrent users peak we were experiencing some slowdowns and decided to upgrade RAM from 16 to 32GB, as well as adding ...
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61 views

Proper Steps To Upgrade My Server 2008 R2 Machine From HHD To SSD

I'm working on upgrading a server's hard drive from a standard HHD to an SSD drive. I have cloned the drive with a program called "EaseUS Todo Backup Free 8.6" (which I think does a bunch of extra ...
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1answer
53 views

When Upgrading My 3.5" HDs To SSD HDs Can I Continue To Still Use RAID 1 (MIRROR)?

I'm upgrading my old 3.5" HDs to a set of SSD HDs. I currently run a RAID 1 (MIRROR) array for the 2 old drives (just in case) and want to know how I should rollout the new SSD drives... I have been ...
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1answer
416 views

Force PCIe SSD to be /dev/sdb on linux install

Is there any options to force the PCIe SSD during install to be not /dev/sda? I was hoping to reserve the SSD to be limited to be only /var but the grub loader fails each time when I try to set the ...
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20 views

dmcache - is removing cache device without suspending safe?

I'm using plain dmcache for SSD cache - unmount procedure goes this way: umount fs suspend cache device remove cache device close lvm close LUKS shutdown However sometimes dmsetup doesn't allow me ...
3
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1answer
46 views

SMART self tests - worthwhile if already doing weekly RAID checks and smartctl -a output being monitored?

If a server is configured to check the RAID weekly using /usr/sbin/raid-check and the output of smartctl -a is being monitored, is it worthwhile to also have regular SMART short and long self tests be ...
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71 views

Is there really any need to use a RAID with SSDs ? [closed]

It seems that SSDs inherently address things that RAID arrays were made to solve - Seek time is 0 ; Lifespan is much longer / health reporting is better / data recovery is generally easier. Plus, ...
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150 views

LINUX fio random read write Total BW and IOPS calcluation

My fio ouptut for random readwrite is as shown below. Fio was initiated with 3 numjobs fio --name=test_random_read_write --iodepth=16 --rw=readwrite --bsrange=4k-8k --direct=1 --size=2G --numjobs=3 ...
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2answers
197 views

Recommended 3x SSD Raid for mysql database [duplicate]

I've been configuring dedicated MySQL server (linux) with 3x 300 GB SSD in SoftRaid. I'm trying to decide which Raid to use to get best performance. I'm expecting this database to be a read-heavy (90% ...
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3answers
103 views

load balance across several SSDs in a server

I would like to have a volume spanning several SSDs or HDDs in my server. When I write a file to this volume, the file is written in whole to one of those drives chosen randomly or in round robin ...
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2answers
147 views

SSD Write endurance, enterprise vs consumer? [duplicate]

A quick question relating to the write endurance different between the now affordable 'high end' consumer SSD's from the likes of Samsung and the very expensive 'enterprise' class SSD's? Is this ...
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1answer
330 views

SSD's in servers, best practice redundancy?

So some might say Im an experienced infrastructure architect guy and have been putting together server farms, storage subsystems and networks for a number of years in datacenter environments ...
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1answer
87 views

non-enterprise SSDs on HP servers [duplicate]

I'm a beginner with configuration of server computers. my company wants to upgrade one of the servers with SSD storage. the server is HP DL380 G8. the hardware seller company which my company works ...
2
votes
1answer
202 views

ProLiant SE316M1 + Intel S3500 SSD + Smart Array P410 512MB. Battery (BBWC) needed? [duplicate]

I'm looking to replace our SQL Server: HP Proliant DL360 G4 2x 64-bit Intel Xeon 3.60 GHz, 1M Cache, 800 MHz FSB 4GB RAM DDR2 HP Smart Array 6i 2x 146GB SCSI 15K (RAID 1) With this: ...
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0answers
23 views

SSD vs RAM - Optimal ratio for different data sets / databases [duplicate]

I am looking for an advice or even better some studies / benchmarks to read for different scenarios (data sets) when it comes to the best ratio between actual RAM and SSDs. I know that fitting the ...
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2answers
198 views

Two Azure disks have the same LUN

I am trying to set up SQL Server on an Azure VM (that has an SSD) per the following articles: Performance Best Practices for SQL Server in Azure Virtual Machines Using SSDs in Azure VMs to store SQL ...
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2answers
60 views

SSD or HDD in multiuser workstation used for numerical calculations? [closed]

I am thinking of buying a new workstation that will be used for huge simulations and numerical calculations in programs like MATLAB. These applications generate a vast array of temporary files, a few ...
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8answers
4k views

Consumer (or prosumer) SSD's vs. fast HDD in a server environment

What are the pro's and con's of consumer SSDs vs. fast 10-15k spinning drives in a server environment? We cannot use enterprise SSDs in our case as they are prohibitively expensive. Here's some notes ...
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1answer
97 views

Changing I/O scheduler for SSD

I have many CentOS systems, some of them have traditional hard disks, some SSD, and some mix of them. I would like to change scheduler for SSD to deadline. So at runtime I can simply scan check ...
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2answers
86 views

RAID 6 - any write amplification in 4-drive RAID?

We're planning to move from a 4-drive RAID6 to a SSD RAID 1, and I was analyzing smartctl data to see how many GB we've writen to the drives over the past year so I can estimate the lifetime of the ...
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2answers
176 views

Hyper-V & SSD Best Performance

I'm building a Hyper-V host using Windows Server 2012. It will be hosting 3 Hyper-V images. I have a SSD and a larger standard HD. I cannot fit everything on the SSD. Performance wise, will I be ...
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2answers
151 views

Detection of consumer SSDs by enterprise disk controller in non-RAID configuration [closed]

We (a client) are considering [insisting on] using consumer grade SSDs (to keep the cost down) in some Dell R710 and HP Proliant D380 G5 servers. I've looked about and people report the P400 cards ...