All Questions
Tagged with raid performance
67
questions
1
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0
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41
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When I use four drives, one operates very slowly
I’m experiencing unusual behavior with my system. When I attempt to write to four disks concurrently. In fact, the last disk (/dev/sdd) consistently operates at a speed ranging from 40MB/s to 5MB/s.
...
- 11
1
vote
1
answer
4k
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Linux MD software raid stripe cache size
From what I can piece together the /sys/block/md0/md/stripe_cache_size is for raid5 and 6 set at a very low default value to avoid starving machines for memory.
By increasing this value you can get a ...
CommunityBot
- 1
32
votes
6
answers
29k
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Does RAID1 increase performance with Linux mdadm?
I have a cheap 2-bay NAS with a 2TB HDD. To be robust against disk failure, I'm thinking of buying a second 2TB HDD and putting it in RAID1 with Linux mdadm. The file system is ext4.
Will this ...
- 101
1
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0
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43
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Are there any performance issues with allowing a hard drive to become full if the drive is effectively read-only?
I'm fairly confident that the answer is "no issues," but I'm asking here in case there are any quirks that I'm failing to consider.
Context
I have a large storage array (on a Linux system) ...
- 200
0
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0
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207
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What's the fastest file system setup for transferring from NVME to HDD?
I'm trying to figure out the proper system layout for transferring data from fast storage to slow storage with minimal bottlenecks. I have a fast array of RAID 0 NVME drives used for daily tasks. At ...
- 141
1
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3
answers
3k
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Windows 10 Pro - Very Slow Bootup // Here's My :: Windows Performance ToolKit (ETL) File
PROBLEM
I installed a FRESH copy of Windows 10 Pro onto my formatted SSD RAID0 drive. This is not an Upgrade from an older OS. Each time on startup (not from SLEEP but actual full startup / restart)...
- 2,428
10
votes
11
answers
46k
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Can someone explain RAID-0 in plain English?
I've heard about and read about RAID throughout the years and understand it theoretically as a way to help e.g. server PCs reduce the chance of data loss, but now I am buying a new PC which I want to ...
- 81
1
vote
1
answer
4k
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Network speed versus HDD speed in NAS RAID5 configuration
I'm considering a QNAP 653D 6-bay NAS with 8GB of memory and an array of 12TB Seagate Ironwolf NAS HDDs configured in RAID 5 (initially with three drives that I bought on sale and expanding to 6 later)...
- 173
0
votes
0
answers
51
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Ramdisk speeds on older server bottlenecked when rsyncing files vs dd
Why am I seeing poor copy performance in memory?
Background and details:
While testing a RAID 10 on an older server, I wanted to see whether or not other parts of my system were bottlenecking my ...
- 238
0
votes
1
answer
903
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RAID vs DFS: What's the difference?
I know the question sounds quite stupid, as to why RAID (Redundant Array of Inexpensive Disks) is compared with DFS (Distributed File System), I may get downvoted.
First of all, I'm aware that RAID is ...
- 11.8k
2
votes
2
answers
6k
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Performance of RAID 5 with mdadm
I have set up a software-raid 5 with mdadm on a 1.3 GHz AMD Neo 36L dual core machine using 3 1.5 TB Seagate Barracude Green drives (4k sectors). The chunk size of the raid is 512 KB. On top of the ...
- 3,450
6
votes
2
answers
12k
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Very slow volume expand on Synology ds2413+
I've posted this elsewhere on the internet aswell, and will obviously reply in both places if a proper solution is found.
I am attempting to expand SHR volumne (2x4TB, 1x2TB) with additional 4TB ...
- 65.3k
0
votes
1
answer
203
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How does loss of single drive influence 4k random performance of RAID 1 array?
Here is one explanation of the benefits of RAID 1:
"As different disks can seek on different data, it [RAID 1] has up to 2x the random read IOPS but the same 1x (or slightly lower, due to ...
CommunityBot
- 1
1
vote
1
answer
3k
views
Is RAID 1 the highest read speed type?
We have some servers that provide a web server with about 4,000 files with 1GB of each.
Always have a problem on bandwidth that server can’t produce on more than 800Mbps and it’s from the read speed ...
- 65
0
votes
1
answer
729
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Will setting up RAID 1 on secondary HDD(s) where games are installed affect performance?
I'm recently setting up a new computer and was trying to decide if I should set up RAID 1 on my computer.
My setup has a small (240gb) SSD for Windows and maybe one or two games I play most often, ...
- 2,875
0
votes
1
answer
95
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maxquant software on my HPDC does not seem to utilize the speed of my m.2 raid drives
I am using a software called MaxQuant v. 1.6.6 to analyze proteiomic data. The computer in question has the following specs:
gigabyte x299 motherboard
i9-7980 chip (18 core, 36 logical, 2.6 GHz, runs
...
0
votes
0
answers
331
views
Why Raid 1 don't improve read performance like Raid 0?
It should be able to read the data across the 2 disks like with Raid 0 right?
but when I look at benchmark it looks like only one drive is used to read the data.
https://raid.wiki.kernel.org/index....
- 667
0
votes
1
answer
2k
views
Unusual slow SSD on RAID 0 performance
I'm using a ThunderBay 4 external enclosure as my main storage and backup unit. Recently I bought two 1TB Samsung EVO 860 SSD to improve performance of my data drives. I installed them using NewerTech ...
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0
votes
0
answers
783
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Very slow bootup time after adding SSD - Windows 10
I wanted to increase the speed of my DLL PC so added a new 120 GB SSD hard disk in addition to the previously present hard disk, system boot up time became very slow.
It is litreally stuck at bios ...
- 101
1
vote
1
answer
3k
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Is it worth switching from RAID to AHCI on on windows 10 pc
Currently I have RAID configured on my PC in BIOS (not at software level).
I wanted to use dual boot with ubuntu but this is not possible with RAID cnfiguration.
Will my pc suffer in performance for ...
0
votes
0
answers
150
views
Server SSD read speed
We have a hp proliant DL580 Gen10 with
5x12Gb/s ssd
2x6Gb/s ssd
I put the 2x6Gb/s ssd in raid1 to install esxi.
How do I configure the 5x12Gb/s ssd for max read performance? i.e. the main workload ...
- 101
-3
votes
2
answers
1k
views
CPU: What is more important when reading from HDD, processor speed or number of cores?
I am considering which NAS to purchase, a Synology DS418play or DS419play.
The former has a Dual Core 2.0 burst up to 2.5 GHz, and the latter has a Quad Core 1.5 burst up to 2.3 GHz.
In either case, ...
- 1
3
votes
1
answer
978
views
Does RAID 0 increase the latency of the volume on HDD? [duplicate]
I will add a new HDD to my computer (identical to the old HDD).
I'm wondering if it's a good idea to do a raid 0 vs using the two drive separately.
How much it impact the latency and the performance....
- 667
17
votes
7
answers
59k
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Should I use "Raid 5 + spare" or "Raid 6"?
What is "Raid 5 + Spare" (excerpt from User Manual, Sect 4.17.2, P.54):
RAID5+Spare: RAID 5+Spare is a RAID 5 array in which one disk is
used as spare to rebuild the system as soon as a disk fails (...
- 10.2k
1
vote
1
answer
104
views
One hard drive in a group is much slower
I bought a group of Seagate Expansion portable 4TB drives to harvest and install as a low-power RAID group. I've been testing them before breaking their cases open in case one has an infant mortality ...
- 21
2
votes
0
answers
237
views
HDD painfully slow only on my computer
I have Dell Vostro 3560 that has Intel Rapid that makes a hybrid RAID with an internal SSD to optimize performance. Just to check things I disabled it to test the pure HDD performance without help ...
- 75.5k
0
votes
1
answer
702
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Terrible write speeds with Z77 Intel 510 RAID 0
I just bought an Asus P8Z77-V Pro board today, connected my old Intel 510's in RAID 0 mode on the Intel controller and installed Windows 7. I'm gettings read speeds of around 900mb/s, but the writes ...
- 65.3k
0
votes
1
answer
267
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Raid 0 Performance Decreased
I was trying to understand the performance benefits of RAID. I created 4 virtual disks in Windows 10 (10 GB each). I then set up 2 of them as Stripped volumes and the other 2 as spanned volumes. Now I ...
- 1,374
2
votes
1
answer
1k
views
RAID 5 degraded performance
I'm currently rebuilding my fileserver, but because of SATA port limitations, I can only use 5 disks at a time. I've remove a drive from my original RAID, so I've been able to create a new degraded ...
0
votes
1
answer
6k
views
Can the transfer rate of SATA limit the performance of a RAID array?
Let's say I have 4 drives and each of them has a transfer rate (random/sequential,read/write, it doesn't matter for the purpose of this question) of 250Mb/s. I put them in RAID 0. This means that I ...
- 65.3k