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

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SSD bandwidth issue and analysis

I have Intel's P3700 SSD mounted on a Lenovo x3650 M5 server with two Intel Xeon E5-2630 v3 CPUs. The server is running Ubuntu 14.04 with 4.6.4 Kernel. I've been using fio to benchmark the SSD using ...
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56 views

Linux mdraid RAID 6, disks drop out randomly every few days

I have some servers that run Debian 8 with 8x800GB SSD configured as RAID6. All disks are connected to a LSI-3008 flashed to IT mode. In each server I also have a 2-disk pair as RAID1 for the OS. ...
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13 views

How to explain this? Superblock corrupt in SSD [migrated]

I got a file system corruption from a sudden power loss. During boot, it reported following error. error: unknown filesystem. Entering rescue mode... grub rescue> _" The board is an Intel ...
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40 views

SSD Temperture Increases during idle

I have 4 Samsung 850 EVO SSDs in a mdraid 10 array inside a high performance simple NAS. running Centos6.8 minimal. I have found that the SSD tempertures start to increase on their own without any ...
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2answers
45 views

ZFS L2ARC for Mirror Pool

I was reading up on L2ARC for my ZFS. I currently have two Pools, One for Data, and the other for Linux Containers and Virtual Machines. I would like some help with L2ARC, I know how to add it but was ...
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2answers
38 views

RAID0 SSDs slow on HP ProLiant

TL;DR Is the RAID controller on the HP ProLiant DL360 G7 known to be slow or problematic? My RAID0 set is performing horribly. I have an HP ProLiant DL360 G7. It came with a 160GiB SAS HDD, and I ...
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2answers
25 views

Can PNY Enterprise SSDs work in Dell R710 with Perc H700?

To improve the performance of a Dell R710 running CentOS 7.2 and being used as a MongoDB server, I'd like to add SSDs. The PNY Enterprise SSDs (specifically the 240GB EP7011) seem reasonably priced. ...
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40 views

hdparm unlock ssd with correct password encoding

I have an old password protected SSD connected via USB to my Linux System. I'm trying to unlock it with hdparm. Problem is my password was ./perspective (it doesn't matter now because I only used it ...
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32 views

Why does 'fstrim /' destroy my mdadm RAID 1 array?

I've rented two physical servers. The servers are identical, except from the disks. server#1: 2 x SAMSUNG MZ7TE512HMHP-00000 SSD server#2: 2 x SAMSUNG MZ7LN512HMJP-00000 SSD When I run fstrim -v / ...
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2answers
104 views

How can SSD write performance be dramatically different on two identical servers?

I am renting two identical physical servers (at Serverloft). These servers come with 2x512 GB SSD disks, and I've set them up with mdadm in a RAID1. The disks are locally installed in the server. The ...
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2answers
40 views

Mounting an SSD

I have recently got a 'dedicated GAME server' from OVH and I've been promised 2x480GB SOFT SSDs. However, df -h shows this output: root@dedi:/home/shavit# df -h Filesystem Size Used Avail Use% ...
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1answer
85 views

Dedicated server with ssd best practice [closed]

I am getting new dedicated server with 240gb ssd drive and 2 x 3tb hdd. I am thinking to put OS on ssd, and then mount uploads dir in my HOME/USER/ directory to HDD. Or maybe vice versa? What is ...
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2answers
57 views

How unlikely it is that 2 SSD disks in a RAID 1 crash and how to recover from it? [closed]

How unlikely is it that a mirrored raid of 2 ssd drives fail together. (Both sector 0) unreadable. Me is told that ssd generally never breaks. So that both break at same time seems unique. What ...
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33 views

mdadm scaling beyond 6 disks w/ ssd's

It seems Linux mdadm produces less writes & iops as more disks are added to an array. For example, I have tested the following configurations, with the defaults aside from changing the I/O ...
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2answers
3k views

What is the current state (2016) of SSDs in RAID?

There are plenty of resources available online that discuss using SSD drives in RAID configurations - however these mostly date back a few years, and the SSD ecosystem is very fast-moving - right as ...
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30 views

How to allocate drives with SLURM

I need to share drives (SSDs or hard drives) in a compute node. The Generic Resource (GRES) Scheduling is a Slurm module designed to manage different kind of resources. For instance it gets a plugin ...
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2answers
48 views

cassandra data migration from regular drive to SSD on production server

we want migrate our data from regular drives on production server to new SSD drives. how we can do that without taking down the node no longer than 4 hours(hinted hand-off is 4 hours) our data is in ...
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1answer
90 views

SSD DD write speed lower than HDD [closed]

I've come across a strange phenomena with a new dedicated server that's been provisioned. The server has 2x1TB HDDs in software RAID 1 and a separate 120GB SSD that is intended to be used as a ...
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1answer
63 views

SSD Server with trim enabled

I have a Windows Server (but I think this problem may apply to any UNIX server too) running using SSD. I have Kingston UV300 SSD and they allow TRIM. I also checked and my Windows is running with TRIM ...
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3answers
94 views

What is the performance impact of disabling NCQ?

Our cluster system runs currently under CentOS7 with SSDs and NCQ disabled. What kind of a performance drop is to be expected within an i/o-heavy usage scenario? I'm not excepting a precise answer ...
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16 views

Does mdstat showing very different block sizes for identical drives indicate a failing drive?

One of my servers has a RAID1 array composed of two 240GB SSDs. It is managed/controlled via Linux, not via a hardware card. Recently, for no apparent reason, the array needed rebuilding. I rebooted ...
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1answer
84 views

Group Policies Not Applied At Startup with SSD PC

I have a problem with some new computers containing solid state drives which will not apply group policies at startup. All other PC's apply the GPO's no problem. Manually running gpupdate /force ...
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1answer
24 views

RAID5 array over-provisioning by creating smaller array?

I did actually read the following thread: How to over-provision an Intel SSD RAID Array via the Dell H700 PERC RAID Controller It did give much information, however not an answer to my question in ...
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1answer
33 views

Consumer SSD on Server only to host OS, MS office, antivirus, accounting software

I have a IBM (Lenovo) System x3500 M4 Server with 16gb 2x 1TD hdd with 20 Terminals Think Clients for remote access at my office which was installed last year in May, replaceing 15 Desktops for team ...
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1answer
40 views

How to calculate storage working set for sizing SSD/Flash size for tiered storage?

How would you calculate the size of the working set of storage that would live in a SSD/Flash tier of a tiered/hybrid storage solution? This would be used to gauge the size of the SSD/Flash tier. By ...
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3answers
40 views

Can't understand this SSD spec

Why is interface 6 Gb/s when the max sequential read is only 550 MB/s and max. random read is only 380 MB/s? Even if this is doubled to include simultaneous read and write, that is way less than what ...
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1answer
89 views

Hardware performance penalty for Hyper-V Generation 2 VMs

I have the following configuration: Windows Server 2012 R2 OS installed on baremetal with Hyper-V. OS is installed on RAID1 850 PRO drives. Windows Server 2012 R2 Guest OS Generation 2 VM is located ...
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80 views

ZFS tuning for SSD queue depths

When using SSD on ZFS, what is the best configuration for the vfs.zfs.vdev.max_active parameters? As I know the default of this parameters is 1000, I don't have the intention to change this, but these ...
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27 views

HP Proliant G6 - Smart Array p410i, RAID 1 Disk upgrade

We currently have 2 500Gb spinning disks in a RAID 1 configuration. Since we are hitting our storage capacity limit, we want to safely replace both disks with 2 larger SSD's. We have a Proliant G6, ...
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2answers
440 views

Swapping older Samsung Enterprise SSD for Consumer SSD (EVO 850) in Dell PowerEdge R820 server in RAID 5 configuration? [duplicate]

I work for a nonprofit organization that contracts with a local IT outfit. We are currently using three enterprise SSD drives in our Dell PowerEdge R820 rig, set up in a RAID 5 configuration. We have ...
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1answer
237 views

Raid in SSD issue with Trim

Yesterday i posted a question about Storage Spaces and ReFS about cache turn off (write through mode) and its settled. I thought it will be simple, but it turns out far from simple and ran into ...
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77 views

HP ML350p Gen8 won't boot from PCIe SSD [closed]

I have a HP ML350p Gen8 with a PCIe SSD and I'm trying to boot from it, but it won't do it. I can see the PCIe SSD in the list of hard drives when to choose where to install windows 10 pro, but after ...
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1answer
29 views

Which bandwith can i expect, when i´m running a SATA SSD on a SAS interface?

So, i know this question had been asked before. I consider to buy a SSD for my Server, because i kinda hate the SAS HDDs in there. I thought: If i connect a SSD, which, in fact, handles way more ...
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1answer
37 views

Why would it matter if instance storage is SSD or magnetic on on AWS?

I'm reading a book on AWS Administration. SSDs are behave more like instance storage than EBS volumes, in that it is not possible to make a snapshot of an SSD. Data must be loaded on to the ...
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458 views

Using Dell PERC H330 RAID controller with not-dell-certified SSDs

we think about replacing our Dell PowerEdge T100 (2009) with a Dell PowerEdge T330 for our small business. Up to 15 clients are using the MSSql Server, some fileshares and printers. The database size ...
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1answer
107 views

Benefits of moving MySQL to its own SSD on AWS EBS

When using hardware (rather than virtualization), there is a clear benefit in using a 200 GB disk for MySQL and a 200 GB disk for content. But due to the way AWS works, is there actually any potential ...
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1answer
40 views

Upgrade RAID 10 with 7200RPM SATA

We have a Dell T320 with a S110 software RAID with 7200RPM SATA drives. The RAID level is 10 with four drives. I underestimated the demand on the disk, and it is now a major bottleneck of the system. ...
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1answer
198 views

Mix HDD and SSD in same RAID 1 array

I have a Dell Poweredge R410 with Perc H200 controller. I would like to upgrade my 15k RPM arrays with SSD. Both disks are SAS 6Gbps. Will it work if I remove 1 of the 2 disks, replace by the SSD, ...
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35 views

Centos 6 ssd mtip32xx driver command(s) timed out: tagmap

We have some servers with Centos 6 with "Micron Technology Inc RealSSD P320h" ssd drives. We have noticed in the kernel log Feb 11 09:47:32 hostname kernel: mtip32xx 0000:47:00.0: 1 command(s) timed ...
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1answer
232 views

HP DL380 G5 supported PCIE SSD/boot from SSD

I currently need a PCIE SSD to my G5's due to SW incompatibility with the P400 raid controller. Is there any PCIE ssd compatibility list? I've seen here that the Asus RAIDR Pcie SSD probably works ...
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1answer
17 views

What does fast small block random reads and writes do for enterprise SSD?

Since I don't have a background in hardware storages, I've read some articles to learn about the comparison between consumer and enterprise SSDs. I'm confused of what makes enterprise SSDs perform ...
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1answer
146 views

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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24 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
87 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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177 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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2answers
257 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
116 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
230 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
43 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 http://i.imgur.com/...
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1answer
66 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 ...