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Samsung Spinpoint F3 HD502HJ 500gb 4x raıd 0??low performance - Page 2

post #11 of 27
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hımm..all hdds are new but i will try to..ty
    
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post #12 of 27
In all honesty, iv'e said what i can, but the only other advice i can give you is to let more and more people here on OCN give input.

Dont take my word for it just yet.
    
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post #13 of 27
If that's 4x F3's in RAID0, then something's not right. It's not your SATA controllers limiting you, because the graph is really spikey. If the SATA controller was the limitation, your results would look a lot like a SSD.

I get better performance than you do with my 2x F3 1TB drives honestly.

attachment.php?attachmentid=188766&d=1294395431

I honestly can't really give you much more help than that though. You haven't given us enough information to know how you set it up exactly, or if you even selected all 4 drives. Or if all 4 drives even match perfectly.
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post #14 of 27
Here are my four F3's in short stroke with onboard sata:
fourf3500gbraid0.png

The only difference I noticed in yours is that you have RAID 4+0 to where mine is just RAID 0. Short Stroking them to 250 will still yield you high speeds no doubt, just make sure you are not doing RAID 4+0. Also make sure when you setup the Stripe size you make it as large as possible for higher speeds. You will sacrifice more storage space in doing so, but if that's the case just make the partition size bigger if need be.

RAID 4: http://www.pcguide.com/ref/hdd/perf/raid/levels/singleLevel4-c.html
RAID 0: http://www.pcguide.com/ref/hdd/perf/raid/levels/singleLevel0-c.html
post #15 of 27
Quote:
Originally Posted by †Blade†;11922454 
Here are my four F3's in short stroke with onboard sata:
fourf3500gbraid0.png

The only difference I noticed in yours is that you have RAID 4+0 to where mine is just RAID 0. Short Stroking them to 250 will still yield you high speeds no doubt, just make sure you are not doing RAID 4+0. Also make sure when you setup the Stripe size you make it as large as possible for higher speeds. You will sacrifice more storage space in doing so, but if that's the case just make the partition size bigger if need be.

RAID 4: http://www.pcguide.com/ref/hdd/perf/raid/levels/singleLevel4-c.html
RAID 0: http://www.pcguide.com/ref/hdd/perf/raid/levels/singleLevel0-c.html

If you notice, your graph isn't very spikey (other than that random dip). You are clearly at the limitations of your SATA controllers.

Stripe size should be 64k for normal use. I'd only use 128k stripe if you're doing ONLY large files to it. 64k stripe will be a lot faster on a daily drive. And the stripe size has nothing at all to do with the space you'll use.

And that is a good point. Mine says "Raid 0" as well. He might very easily be doing a different type of RAID on accident.

EDIT:
I take that back. Mine says 2+0 / RAID0. His says 4+0 / RAID0. So that SOUNDS like its setup correctly.
Edited by pioneerisloud - 1/7/11 at 2:36am
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post #16 of 27
Thread Starter 
ty guys..

yea its amd-intel different i think..

intel systems seems raıd 0 volume

amd systems seems 4+0(2+0)strippe raıd 0

i did my test on 250gb and strippe size 64 kb..

i dont know what i can doing about this problem!!
this evening i will setup again.but i am not sure where is the problem:(

maybe bios settings?but dont know..

all of them new hdd guys..so all will be master on jumper..is it problem?
Edited by calebkan - 1/7/11 at 2:46am
    
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post #17 of 27
Must be an AMD mobo raid config then, I do see that both of you are running AMD.

As for stripe size I do believe it does make a difference in storage space.
Source
Quote:
In general, your stripe size choice has an impact on several factors:

• Performance
Conventional hard drives deliver their best transfer performance when they read or write sequentially, repositioning the heads as little as possible. From this standpoint, it makes the most sense to select the largest stripe size available, especially if your hard drives are good at providing high throughput. However, this only works if the files stored or read are at least as large as an entire stripe. If you will end of storing millions of text files, Word documents, small spreadsheets or similar small files, small stripe sizes will help to distribute all files across multiple drives to keep throughput high.

• Capacity Used
The stripe size also defines the amount of storage capacity that will at least be occupied on a RAID partition when you write a file. For example, if you selected a 64 kB stripe size and you store a 2 kB text file, this file will occupy 64 kB. Obviously, the stripe size defines the minimum amount of data that a RAID controller will distribute files across its hard drives, in my example, 64 kB. As long as a file can be written onto a single stripe or a single drive, you won’t have any advantage from running this particular RAID array.


If you want to create a RAID array for quick access to small files, small stripe sizes are favorable, to keep the waste of storage capacity small, and to provide high throughput thanks to a high level of data distribution across many drives. File servers for photos, audio and video should, however, be operated with larger stripe sizes, as this helps to maximize sequential read performance. In the end, the best solution is to experiment with various options: try both a small and a large stripe size and collect performance data for it. We recommend avoiding making little steps: going from 32 kB to 64 kB stripe size won’t have a significant impact.
post #18 of 27
And I'll quote that same text:
Quote:
Performance
Conventional hard drives deliver their best transfer performance when they read or write sequentially, repositioning the heads as little as possible. From this standpoint, it makes the most sense to select the largest stripe size available, especially if your hard drives are good at providing high throughput. However, this only works if the files stored or read are at least as large as an entire stripe. If you will end of storing millions of text files, Word documents, small spreadsheets or similar small files, small stripe sizes will help to distribute all files across multiple drives to keep throughput high.

In other words, OS files, and game files would all benefit having a slightly lesser stripe size. I've seen games install with a LOT of small files. 64k stripe size is generally considered the "normal" stripe size for a RAID0 for normal OS and gaming use. The only time you'll benefit from a 128k stripe is for basically a media drive.
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post #19 of 27
Haha touche, so it looks like we both were a little off in our sayings. Mine cause larger stripe size doesn't necessarily mean faster overall. And you stripe size does minimally impact storage capacity, just not on a large scale.
post #20 of 27
Quote:
Originally Posted by †Blade†;11922595 
Haha touche, so it looks like we both were a little off in our sayings. Mine cause larger stripe size doesn't necessarily mean faster overall. And you stripe size does minimally impact storage capacity, just not on a large scale.

Let me put it this way, a 1MB file is a 1MB file. It's still going to take up the same amount of space on the drives. You're still going to have 2TB storage space (assuming my drives here). The only time that comes into effect is when you have files SMALLER than 128k (or 64k). And honestly, how many files is that?

It is, however, FASTER to use the 64k stripe for general use, over the 128k stripe.
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