All Questions
166
questions
0
votes
0
answers
10
views
How to format NVMe drive in Linux suitable for raid 1 and lvm on xen Host
I want to create a software raid on two identical SSDs
How do I create partitions and format them optimal?
lsblk
nvme0n1 259:0 0 953.9G 0 disk
nvme1n1 259:1 0 953.9G 0 ...
- 2,499
2
votes
1
answer
101
views
Unable to get my rsync of my software RAID 6 past 40MB/s. Looking for suggestions
Wondering what I could adjust to get my RAID 6 Software Raid to resync quicker. Currently it's proceeding at max of 64MB/s and averages to something around 25MB/s. Hoping to get it to 200MB:
[...
1
vote
1
answer
51
views
Replacing a single SSD in 4 disk mixed software RAID 1 & RAID10 system
I'm about to replace a single SSD in a 4 SSD RAID 1 & RAID10 system. My webhoster will only do the drive replacement, but not help with adding it back to the array after. I've not done this before,...
- 1,471
2
votes
2
answers
88
views
RAID10 on SSD drives
I can't find information about using SSDs in RAID10. If I want to build RAID10, should I create RAID partition in 80% of total drive size on each drive?
- 21
1
vote
0
answers
78
views
Adaptec ASR-6805T can create raid from ssd only?
I'm about to move my Proxmox home server from NAS to RAID 10. I'm a hardware RAID fan, so I chose a solution among inexpensive old controllers. In the course of studying budget solutions for the home, ...
- 63
0
votes
1
answer
183
views
Flash Crucial SSD firmware through PERC 730P Mini RAID controller
We've got a number of Crucial drives in Dell r630 servers with PERC 730P Mini RAID controllers that need their firmware updating as they're still on version M3CR032 with the known issues.
The servers ...
- 103
0
votes
0
answers
67
views
Can I make hotremove/add on raid5 with mdadm?
I created and assembled software RAID5 array (mdadm), 15 SSD disks.
If I physically remove several disks and add them back, RAID doesn't assembles back. Disks stays in "spare" mode. Even ...
- 1
0
votes
1
answer
675
views
HDD vs SSD for mongodb database server
I am setting up a physical server for an application that we have developed, the purpose of this server is to run the server's own software and store its database (mongodb).
On the server machine we ...
- 3
0
votes
0
answers
1k
views
How does RAID0 affect IOPS performance for NVMe SSDs?
I have an application which needs to read large amounts of small and randomly distributed entries from storage. To improve the performance I am considering to install a specialized hardware RAID ...
- 135
3
votes
3
answers
182
views
Is it a good practice not to use all the disk space for RAID?
I'd like to configure a pair of 4TB SSD drives in RAID1.
I consider that when in several years one of the drives fails, and I would want to exchange it, the exact model I have now might be unavailable....
- 133
0
votes
0
answers
33
views
Optimise Write performance on a RAID array of SSD [duplicate]
We've 8 Samsung 970 Pro 1Tb drives (PCI3) in a HighPoint NVMe RAID Controller, which I want to optimise for write performance at the cost of any other consideration. All of our files will be around ...
- 113
0
votes
1
answer
702
views
RAID10 Performance on newer hardware slower then RAID5 performance on older hardware?
I am currently trying to figure out a performance issue with a new server compared to a old server. Performance should be better but it's not and I'm having trouble figuring out why.
Old server is a ...
- 93
-1
votes
2
answers
1k
views
RAID performance with 10xSSD on an HP P420i [closed]
I am planning to use 10x 8TB Samsung 870 QVO SATA III 2.5" SSD in an HP DL360 G8 server that uses P420i smart array controller.
Each SSD has a max of 530 MBs speed in sequential reads. ...
- 91
2
votes
1
answer
237
views
RAID controller detecting SSD as foreign after every reboot
My server, an R610, has been detecting my SSD as foreign after every reboot. It has a PERC 6/i RAID controller, but there's no actual RAID stuff (I just have all the drives as their own VDs).
This had ...
- 282
1
vote
1
answer
361
views
disks for a small esx-host: ssd raid5 or hdd raid10? [duplicate]
I am about to replace an ESXi host that runs some 20 VMs (mostly idling).
Today around only 800Gb is used on an external iscsi-box, raid6 (total 7Tb).
The new server will just simply have internal ...
-1
votes
1
answer
1k
views
8 x 15k SAS hdd disk with raid 0 performance vs single SSD disk for database [closed]
Which one has a better performance for database application (e.g. postgres) if we just consider read/write operations speed and not fault tolerance
8 x 15k SAS hdd disk with raid 0
single SSD disk
- 1
3
votes
5
answers
1k
views
Raid 1 default disk capacity is lesser than the disk sizes. Any ideas? Intel Raid Storage Technology - Raid from Bios
Here the screenshots I think they explains everything
The disks are advertised as 1 TB and the real size of the disks are 931.5 GB
I have installed windows server without raid setup for ...
- 556
1
vote
1
answer
124
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 ...
- 11
4
votes
2
answers
565
views
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 ...
- 91
2
votes
2
answers
709
views
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 ...
- 121
1
vote
1
answer
666
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 ...
- 11
1
vote
1
answer
2k
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 ...
- 111
1
vote
0
answers
51
views
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 ...
- 11
1
vote
0
answers
110
views
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 ...
- 11
4
votes
1
answer
2k
views
Slow RAID performance for Samsung EVO's
So I've been suspecting performance bottlenecks on a Samsung EVO 850 RAID1 for sometime, but honestly been too lazy to look into it. Now I was starting a new home project, involving a Vmware ESXi host ...
- 51
3
votes
1
answer
717
views
Hp ssd p420i iops
i am creating an linux(centos7) nfs ssd datastore for vmwware esxi.
i am using an HP dl360e with p420i(1GB cache) and 6 x ssdsc2ba200g3p 200GB ssd 6g drivers(HP part number 730053-B21).
Using fio i ...
3
votes
2
answers
4k
views
DELL PERC H730 RAID Performance Problems
I purchased a Dell EMC R740 with 8 Intel S3520 SATA 6 Gbps SSD drives. The problem I have is that no matter what RAID configuration I select I seem to be limited to roughly 5 Gbps. I would think ...
- 31
5
votes
2
answers
1k
views
Server Hot Swap Hard Drives
We have a HP Proliant DL380 G9 server. We have a separate data drive which consists of 4 x 1TB 7.2k 6Gb hot-swappable SAS drives RAID 5'd to provide a 3GB logical drive. We've noticed the performance ...
David Colley
0
votes
1
answer
776
views
HP DL360 G7 Smart Array P410i drive mix [closed]
i have HP DL360 G7 Smart Array P410i with 3xSAS HDD 146 GB in RAID5.
I decided to change hard drives to SSD ones (3x180 Intel SSD).
My idea was to change drives one by one and wait for RAID rebuilds.
...
- 11
-1
votes
1
answer
406
views
Best configuration for a software RAID 10 SSD for VM xenserver [closed]
I have xenserver servers.
For storage of virtual machines, I use the software RAID 10 (the disks are directly in the servers).
I would like to know the best configuration for 4 SSD disk in RAID 10 ...
1
vote
0
answers
2k
views
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:
...
- 203
2
votes
1
answer
2k
views
Windows encrypted software raid
Is it possible to have (preferrably with Windows-on-board tools of Windows Server 2012 R2 and Windows Server 2016) to have a software raid mirror on 2 encrypted disks? (Locally preferred.)
From what ...
- 201
6
votes
1
answer
8k
views
Poor write performance of software RAID10 array of 8 SSD drives
I have server with Supermicro X10DRW-i motherboard and RAID10 array of 8 KINGSTON SKC400S SSDs; OS is CentOS 6
# cat /proc/mdstat
Personalities : [raid10] [raid1]
md2 : active raid10 sdj3[9](S) ...
0
votes
1
answer
575
views
MySQL perf bad on SSD-based server. Small tables. MySQL config? RAID?
I have a couple of servers in an industrial setting (air-gapped network) that do some fairly light telemetry gathering. We generate about 10GB of telemetry history in ~30 days.
All telemetry goes ...
- 31
6
votes
1
answer
4k
views
SSD IOPS on linux, DIRECT much faster than buffered, fio
I have a 30Tb-sized hardware RAID-6 system (LSI 9280-8e) of 10 DC-S4500 Intel SSDs that is used for database purposes. The OS Debian 7.11 with 3.2 kernel. The filesystem is XFS mounted with nobarrier ...
- 185
6
votes
3
answers
3k
views
What is the Long term stability of NVMe or SSD stored data?
Background:
We need ready access to 30TB of audio data, although only a small fraction of it is ever requested for playback, that playback needs to be done immediately even for multi-year old data. ...
- 620
1
vote
1
answer
3k
views
Can I move from SAS HDD to SSD?
I have an HP ML350 Gen 8 server with 8 SAS HDDs of 600 GB each. Since the drives are a little bit old now, I would like to replace them with SSDs.
I would like to know if I can do this, and if I ...
- 111
4
votes
2
answers
2k
views
DL380p G8 SSD cache
I have HP DL380p G8 with smart array P421i.
I would like to use SSD cache for my HDDs RAID 10 volume.
I got know I have to buy a SmartCache license for the array and I found some weird info about the ...
- 41
2
votes
2
answers
6k
views
PERC, Caching with SSDs
We have a few servers with PERC H710s, we're moving to SSDs and I wonder, is caching needed given that we're not using spinning disks? Our general setup is as follows
2 X 2TB SSD in RAID 1
Read ...
- 21
4
votes
1
answer
258
views
Mixing mdadm RAID with partially power loss protected SSDs
I have created a mdadm RAID 10 with 4 SSDs. 2 of those SSDs are consumer models and does not have the power loss data protection feature.
At the RAID creation i have put 1 SSD with power protection ...
- 199
20
votes
4
answers
14k
views
Does a RAID controller with an NV cache improve the performance or integrity of an SSD array?
I am planning to purchase a server (Dell PowerEdge R740) with SSDs in RAID 10, and my priorities are write performance and data integrity. It will be running Linux. The SSDs have write caches with ...
- 499
2
votes
1
answer
296
views
Transfer Speed Sudden Drop on Intel Raid Card between (2) 4 SSD Raid 0 Arrays
Preface; I have done hours of trouble shooting on this issue and simply cannot find out what the sudden "bottleneck" is.
I have (2) 4 SSD Disk Raid 0 Arrays (3.8TB Each).
They are run off a single ...
- 121
3
votes
1
answer
10k
views
HPE 1.92TB SATA 6G Mixed Use SFF SSD very slow compared to SAS HDD HP disks
In below screenshot, I benchmarked 3 machines, 4 Drives. my main production based on DL580, HPE 1.92TB SATA 6G Mixed Use SFF SSD RAID 1.
MySQL insert time of 1 million rows is ~ 30 seconds in the SSD,...
- 254
1
vote
1
answer
844
views
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 ...
- 13
1
vote
1
answer
7k
views
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 ...
- 21
2
votes
1
answer
2k
views
4gb cache RAID and 2gb cache RAID controllers VS SAS and SSD disks
I'm going to provision a server with 2 raid controllers, both controllers have the same specs but the cache, being one a 2GB cache and the other a 4GB cache controller, let call them respectively SC (...
- 654
2
votes
4
answers
4k
views
RAID 5 for SSD drives.
I am planning to deploy a cost efficient yet performant SAN/NAS setup for our main office. Use cases: storage for a 20-30 user VDI deployment, file server, primary backup location. Required usable ...
- 305
0
votes
2
answers
110
views
Web/Cloud/File Server with 3 SSDs
I built a small N3160/8GB server with 1x120GB mSATA 850 EVO and 2x250GB 850 EVO SATA3 SSDs. It is a mini-ITX motherboard with just 2 SATA ports and 2xmSATA slots (manufacturer says one can be used for ...
38
votes
2
answers
8k
views
What risks are there with mixing SSD models in RAID?
Aside from one type of disk bottlenecking the other, are there any other problems with mixing SSD models in RAID?
My problem is, I need to upgrade the storage in a server with 4x Samsung 845DC EVO ...
- 947
1
vote
1
answer
148
views
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 ...
- 117