4 hdd in raid 0 too much? - Page 2 - Overclock.net

DuckieHo · 07-10-09

Quote:

Originally Posted by apt2vanish

with a fastTrak 4310 PCI raid controller I am getting between 101.5-105.3Mb/s avg thats with all four drives.

Seems very low for almost $500 worth of hard drives.
I even turned on write-buffer with the same results.
gonna plug them onboard and see what happens

LOL. You have a PCI controller. The PCI bus only has 133MB/s shared among ALL PCI devices. Your bottleneck is the card.

Why aren't you just using onboard RAID?

apt2vanish · 07-10-09

Quote:

Originally Posted by binormalkilla

I have 4 in RAID0 and yes it's fast, but I think I'm going to take one off and add it to my RAID5 array........I am never going to fill 1.76 TB of data for the OS and temp downloads, and I don't trust RAID0 enough to store my media.

After looking at the results I see that the numbers are very low......it may be that RAID with NV SBs really suck.
What sort of speeds do you get with 2 drives? 1?
My WD Caviar 500GBs (not super fast drives mind you) I get 150min, 319 max, 250 avg with 11.1ms access on my PERC. Granted there should be some increase for the controller, but not really that much.
I would make sure that the controller is functioning properly, as it seems that the results are a bit low.

If you can spare $75 you might want to grab a Perc 5 controller on ebay.........they're awesome for the price.
Mine handles my 4 drive RAID0 and 4 drive RAID5 like a champ.
It only takes ~1 hour to rebuild the RAID5 array when I disconnect a drive (purposely simulate failure.)

I will do more testing this weekend, thank you for that info now I have something to compare to. I will def look into a perc 5 controller.

Quote:

Originally Posted by DuckieHo

LOL. You have a PCI controller. The PCI bus only has 133MB/s shared among ALL PCI devices. Your bottleneck is the card.

Why aren't you just using onboard RAID?

I have been, I just happened to find that pci raid card laying around, I think it was used for a raid 10 array for data on one of out servers. was just doing some testing with it.

apt2vanish · 07-10-09

This is bs, now all of a sudden I can't get any of the raid drivers to show my array during an install, I just re-installed a few days ago with the same ones. How the heck does that happen?

I remember when we had to re-install our servers with server 2008x64, and I had this same problem.
like using 64bit drivers to get the arry to show up on one machine , then using 32bit drivers on the other, when the hardware is identical....how stupid is that?

Anyone have any ideas what is going on here?
(i have the controller turned on for raid, and created a 0 array with four hdd, then added a 300gb seagate by itself on the same controller ~two port side of the controller~)

Well thats strange windows 7 had the drivers already cooked into the disk, so I finally was able to test the raid
here is with win7 default drivers

here is the drivers for my board (newest JMB36X)

Now I have to re-install again because win7 created the 300mb recovery partition on my raid array, so if I am to break it and test just 2 drives I have to re-install. maybe I'll try to move it to the installation disk, but doubt thats gonna work

binormalkilla · 07-11-09

Well I never noticed that he had a PCI controller.........yea as Duckie said your bottleneck is the PCI bus speed. You need at least a PCI-E x4 (really x8 would be preferable as in the Perc and most other controllers.)

apt2vanish · 07-11-09

Quote:

Originally Posted by binormalkilla

Well I never noticed that he had a PCI controller.........yea as Duckie said your bottleneck is the PCI bus speed. You need at least a PCI-E x4 (really x8 would be preferable as in the Perc and most other controllers.)

Actually I just found the pci controller and wanted to see if I would get better speeds, but I didn't. My normal array is onboard my foxconn, and not on a pci card.

spccraig9 · 07-13-09

4 drives on a RAID 0? Wow, I don't think I would ever do that. Three at the most for a RAID0.

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4 hdd in raid 0 too much?

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