RAID Not Performing?

Wizardskills

Wizardskills

Wizardskills

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Hi all,

I have set up 2 seagate 320Gb HDD's in RAID 0 using my motherboards RAID controler. The RAID seemed to be working fine, but not giving me much of a performance increase so i decided to test its speed against an identical single drive. Results below (RAID drive is the second graph)

temp-4.jpg


Now there doesn't seem to be a massive differance in the numbers. Is this normal or have i set it up wrong?:confused:
 
What size have you set the RAID0 to in the RAID BIOS?

I have mine at 32kb, as i tried 16kb and 64kb and found 32 to be the best.

Also, are you using the Gigabyte RAID or the Intel. With Intel, if you go into the Intel Storage Matrix program, you can turn on write-back caching which can improve speed.
 
i thought raid 1 increases performance :S ie using 2 disks at same time with same data on each, and raid 0 just makes it easier to manage :(.
 
Raid 0 is faster due to splitting data onto two spindles, raid 1 just mirrors data meaning same speeds writing as a single drive but slightly faster supposed speeds reading.
I ran some controlled tests last week on a new HP 7800 minitower using several different drives, 80gb Hitachi sata, 250 gb WD RE drives and WD Raptor 74gb sata drives. Windows xp sp2 image with 1gb pagefile and index service turned off.
First of all, 2 x 74Gb Raptors striped on a boggo adaptec 1220sa card
7800raptorstripeonadaptec.jpg


Next up, same setup minus the adaptec card and running a single raptor..
7800noadaptersingleraptor.jpg

3rd up is the 2 x 250gb wd Raid Edition running in a very average benchmark.
78002x250wdre2array.jpg


Last of the posted tests is the hitachi 80gb 7200rpm sata drive. It has a decent burst rate but being a single slower drive it only looks average I also think I hadnt turned off the index service as it does cause spiking.
7600hitachi80gb.jpg
 
Last edited:
schumi84 said:
What size have you set the RAID0 to in the RAID BIOS?

I have mine at 32kb, as i tried 16kb and 64kb and found 32 to be the best.

Also, are you using the Gigabyte RAID or the Intel. With Intel, if you go into the Intel Storage Matrix program, you can turn on write-back caching which can improve speed.
Click to expand...

I set it to the standard one, which i think was 128kb ont he Gigabyte RAID :confused:
 
Raid 0 is striping ie you get the full use of the two drives capacity. In this case 640gb
Raid 1 is mirroring where windows only sees one logical drive and the second disk is a mirror copy.
 
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