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  Tom's Hardware Forums » Storage » NAS/RAID & Technologies » RAID 5 write speed help
 

RAID 5 write speed help




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 Thread : RAID 5 write speed help
 
Profile: stranger
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I have been trying to figure out if it is possible to speeds up my file transfers to my server. Here are the specs of the server:
Pentium D 805
2 GB DDR2-533
ECS P4M800PRO-M v2
LSI MegaRAID 150-6 (running in a 32bit PCI slot)
3 X 500GB Hard Drives in RAID 5
I get about 11MB/s when writing files to the server through a USB hard drive (write back enabled). Is this considered normal write speeds for RAID 5? I know I am running some old/cheap hardware, but I was expecting the write speeds to be higher. I figure the issue is probably either the motherboard or the RAID card. What would be the best way to increase the write speeds? New raid card? New motherboard?

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BAM!
Profile: Faithful Poster
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First of all... the limitation here would be the USB drive, so i wouldnt be concerned for your array... if you get HDTach you could do some testing to get a better figure.

Have you got USB2.0 harddrive? I see your mobo does but dont know about external drive... drivers maybe an issue here too try maybe updating chipset drivers from ECS website.

Although the RAID card will be somewhat limited by the 32Bit PCI slot it would NOT limit it to 11mb/s


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"This thread made me strap on my lolerskates and head for my roflcopter."
Profile: stranger
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It is a USB 2.0 drive, but I know it's not the issue. I can read and write to it much faster on any other computer. Also I got a similar speed when I transferred data from an SATA drive to the RAID array.


Message edited by brad28304 on 02-22-2008 at 03:34:00 AM
Profile: stranger
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Hi

Please assess whether you have the latest driver loaded, expereinced a similar problem on a Raid PCI card. After update, I could not believe the difference.

Regards

Profile: stranger
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Well I am running ubuntu 7.10 I just put the CD in and installed. I guess its running the default ubuntu 7.10 drivers. I am not sure how you check.

Profile: stranger
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Hi

Unfortunately unable to help, noob on Linux. This was an experience on Winodws XP Pro. I am sure you may be able to get help in the O/S section of the forum.

Regards

Druedd

Sniper
Profile: Forum Fixture
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brad28304 wrote :

I have been trying to figure out if it is possible to speeds up my file transfers to my server. Here are the specs of the server:
Pentium D 805
2 GB DDR2-533
ECS P4M800PRO-M v2
LSI MegaRAID 150-6 (running in a 32bit PCI slot)
3 X 500GB Hard Drives in RAID 5
I get about 11MB/s when writing files to the server through a USB hard drive (write back enabled). Is this considered normal write speeds for RAID 5? I know I am running some old/cheap hardware, but I was expecting the write speeds to be higher. I figure the issue is probably either the motherboard or the RAID card. What would be the best way to increase the write speeds? New raid card? New motherboard?


Thats most likely the problem. Imo, ECS boards have a tendency to have a lot of problems. It could also be your RAM, which is limited to 533Mhz.


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Profile: stranger
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Ok, let’s just say my motherboard is the problem and I replace it. Would one that has a 64bit PCI (PCI-X?) bus be worth it? Or should I just stick to a 32 bit one (much more common). Any recommendations? Also what kind of write speeds should I be getting roughly?


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