All Questions
Tagged with raid performance
67
questions
2
votes
1
answer
763
views
Test RAID array read write speeds from boot disk
I have a VMware ESXi server with a local RAID 5 datastore formatted with VMFS. The RAID controller is a DELL PERC H710 hardware controller and the server is an R620. I get abysmal write speeds, ...
- 65.3k
0
votes
1
answer
2k
views
Xpenology (Synology) fast read speeds slow write speeds
For 2 years I've used a Xpenology server which has an Raid 0 volume and works perfectly fine. Gigabit read and write whitout any problems.
Now am I installing a Raid 5 volume 3x4 tb WD red. I'm not ...
- 151
0
votes
1
answer
92
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Can Windows 7 make good (high performance) use of RAID 1 between a SSD and a HDD?
Recently my hard drive died, and I lost all my files and I am really sad.
Right now I am making a software 1 raid between my 2250MBps/1850MBps Pcie 3 8x SSD, and my 1TB 170MBps/170MBps hard drive.
...
CommunityBot
- 1
6
votes
1
answer
696
views
Strange performance from RAID5 using WD RE4 disks
I've noticed a bit of a performance issue with some WD RE4 drives I'm using under AMD's hardware RAID solution. First a bit of background:
Environment: Windows 7 home premium x64
HDD's: 3x 1TB WD ...
- 65.3k
4
votes
1
answer
3k
views
SSD Cache/Buffer for HDD RAID
I have three 3TB 5400rpm HDD's running on RAID 5 in my Ubuntu server VM as my NAS. I recently just hooked up this NAS Server directly to my Desktop via 10GB Ethernet cards and fiber optic cable (...
- 6,422
1
vote
1
answer
10k
views
Windows 10 Storage Spaces Poor Speed
Using Storage Spaces under Windows 10 Pro, I am observing poor, nonsensical speed. A two-way mirror and a simple space across four drives on 2012R2 and 2016TP produce completely different performance ...
- 36
1
vote
1
answer
551
views
Raid Controller Write-Back Cache Behavior
I am trying to understand how it is that the write-back cache on a raid controller can continue to yield a benefit while you're writing a huge random dataset. Let me first say that I understand how a ...
- 9,467
0
votes
2
answers
723
views
Speed up ubuntu on desktop by moving some directories to a faster storage
I want to speed up my ubuntu install a bit. I was using a RAID1 setup for the whole system (separate md for /home and /). Now (thanks to http://www.webdesignblog.asia/operating-systems/linux-os/...
- 1
0
votes
2
answers
922
views
SiI 3114 vs. ICH7R RAID performance
I just got two new WD5000AAKS 500GB SATA 3.0Gb/s drives, and I need to put them in a RAID-0 array (I know that motherboard-RAID generally isn't the best for speed increases, but I have little choice). ...
- 103
1
vote
1
answer
488
views
What are the performance differences between SSD caching and native SSD usage?
I am looking at making some changes to my computer. I currently have a machine running on the X79 chipset and I am using a dedicated RAID controller. The controller is an LSI MegaRAID 9260-8i SAS / ...
- 2,147
-1
votes
1
answer
4k
views
4-bay NAS write performance RAID 5 + SSD vs RAID 10
I am planning on buying a new NAS (QNAP TS-453 Pro) for my Home Office.
The NAS has 4 HDD bays and supports SSD Caching. Hence, I was wondering which setup would probably be faster in terms of write ...
CommunityBot
- 1
-3
votes
2
answers
570
views
Which has faster read/write speeds an external hdd raid or external single ssd [closed]
I want to move data to an external hard drive AS FAST AS POSSIBLE and I was wondering whether it would be better to have 2 HDD (7200 rpm or higher 500GB each) in an enclosure running RAID 0 or a ...
- 3,451
0
votes
1
answer
8k
views
How can I achieve maximum sustained sequential disk write performance?
I need data write rates of ~1 GB/sec sustained for ~1 hour. Data is coming in over this PCIe x4 frame grabber. I need to stream its full bandwidth to disk.
I don't have experience with RAID, but as ...
CommunityBot
- 1
0
votes
1
answer
2k
views
poor write performance with RAID 5 array
I have an Intel RS2WC080 RAID controller card connected to an array of 8 WD Black 4TB SATA3 drives, in a RAID5 configuration.
While the read speed is ~750MB/s the write speed hovers around 45MB/s. I ...
- 4,329
1
vote
1
answer
1k
views
4 SSDs RAID 0 integreted vs dedicated controller
I've been thinking about setting up 4 SSD RAID 0 to gain performance in my home PC, and I ran into this review of PCI-E based SSD.
If I use PERC H310 (8 lane PCI-E 2.0 RAID controller, which means ...
- 9,302
0
votes
1
answer
21k
views
Recommended RAID5 stripe size?
I have a RAID5 array built from 4 1TB drives. I initially set the stripe size to 1M since I will be storing large files (much larger than 1MB). The NTFS cluster size is 64KB (largest possible). ...
CommunityBot
- 1
5
votes
2
answers
338
views
Would an array of SSD drives be able to succesfully substitute the system memory?
I watched a few videos trying to answer this.
This video (youtube.com/watch?v=eULFf6F5Ri8) shows a bunch of guys stacking 24 SSD's reaching a peak of around 2GBps r/w. That's under the limit of the ...
CommunityBot
- 1
0
votes
1
answer
4k
views
Windows Dynamic Disks vs BIOS FakeRAID
I have two 3TB disks in a Windows 7 Dynamic Disk Mirror array (effectively, software RAID1).
Apart from being tied to the O/S (I can't mount the array in Linux, for example) - is there any difference ...
- 57.5k
1
vote
1
answer
365
views
Troubleshooting major performance issue: Is culprit Intel RST, Hard drive, or something else?
The Setup
I have the following components that come into play in this situation:
ASUS P8Z68 V/PRO motherboard
a RAID1 configuration (1x 1TB drive, 1 x 2TB drive -- I explain below), accelerated with ...
- 2,402
1
vote
1
answer
557
views
RAID0 SSD performance degredation
I have a computer built to acquire uncompressed 2048 x 2048 16 bit images at 100 frames per second in real time, writing to disk. A RAID0 of SSDs is thus the only option.
For the past month or so, ...
- 164
1
vote
4
answers
3k
views
RAID 6 that can read with least 1000 Mbit/s?
I purchased a Dell PERC 6/i which I expected to be able to read with 1000 Mbps. There is not much to do now, but there are some things I wanted knowledge about for another time.
I have configured it ...
- 73.6k
0
votes
1
answer
45
views
Checking drive healh of RAID 0 with MOBO built-in RAID
I have the following MOBO: IPMTB-TK (Truckee) motherboard for HP Pavilion Elite HPE-490t.
I have 2 WD Blacks in RAID 0 mode. I was wondering if there is a way to view the status of each drive and it'...
CommunityBot
- 1
3
votes
1
answer
5k
views
What do I need to saturate a 6Gb/s SATA connection?
I know the throughput of a standard HDD doesn't quite saturate a 6Gb/s connection (if someone has a numerical value, that would be great). I have been told that the only way to reasonably saturate ...
- 65.3k
5
votes
2
answers
10k
views
Is it normal for Windows Software Raid (Mirroring) to slow a drive's performance?
I've been doing some performance tests on a few of my drives lately, trying to figure out which combination of drive/raid-level(or not) will give me the best performance (for Hyper-V incase anyone's ...
- 21
1
vote
1
answer
123
views
RAID 1 : one device reads while the other writes symmetrically. What is going on?
Take a look at the disk throughput of this two disk software RAID 1 array in a Linux 2.6.26-2-686 Debian system :
As you can see, one device reads at a speed apparently close to its top throughput ...
2
votes
1
answer
493
views
8 hard drives, very same model, software RAID0, terrible performance
I have 8 hard drives in my PC, assigned as storage.
Three of them are attached to the mainboard.
Four of them are attached to a controller [ SiL 3114 ]
One of them attached to an another controller ...
CommunityBot
- 1
1
vote
2
answers
2k
views
Does chunk size affect the read performance of a Linux md software RAID1 array?
This came up in relation to this question on determining chunk size of an existing RAID array.
The general consensus seems to be that chunk size does not apply to RAID1 as it is not striped. On the ...
CommunityBot
- 1
0
votes
1
answer
310
views
Can different models of drives be arranged in RAID 0
Given one WD Caviar Black 2TB and WD Caviar Green 1.5TB please tell me the following:
Can these two be stripped (RAID 0)?
Will there be a performance increase, or would using WD Black as a system ...
- 9,059
2
votes
2
answers
4k
views
Can a Raid5 array be optimized using defragmenting or other maintenance tools?
I have a Lian Li Ex-50 Raid Array setup to be 4x 2TB WD Black in a Raid5 formatted to HFS+ (journaled).
The raid array is a hardware raid running through a Sil3132 chipset (SATA2 via eSata connection)...
- 2,065
3
votes
1
answer
218
views
Is Splitting IDE hdds between Primary and Secondary faster?
I'm doing RAID 0 on two IDE harddrives (yes, this is old hardware). Will the harddrives be faster if I attach them separately so that one is on the Primary IDE controller and the other is on the ...
- 61.9k