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RAID vs single drive: same speed

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January 7, 2013 10:24:57 AM

Hi, Right now i am quite confused, because my new RAID-0 array from 2 disks has nearly same performance than single Disk (disk used for this raid)
I was testing speed in HD tune and it seemed very good: nearly 2x performance, But then i tried load and save quite big file in 3ds max and also in photoshop (cca 1,5gb) result: exactly same time!!!
So i am asking, what is wrong?

My configuration:
MB: ASUS-P9X79 -LGA2011
HDDs: Seagate Barracuda 7200.12 1000GB -ST1000DM003
RAID driver on board: Intel C600 series chipset
Windows7

It would help have external RAID card?
Thanks for any help



a b G Storage
January 7, 2013 12:21:01 PM

have you set the raid in bios or is it a software raid?
a b G Storage
January 7, 2013 12:32:25 PM

Your average went up almost 120MB/sec. It's possible that file saves might be limited in speed by the software generating and parsing the save file, or another limitation like CPU speed, etc. HDTune shows raw read/write speed, and your gains are typical of using an onboard Intel RAID in that situation.
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January 7, 2013 3:10:02 PM

Thanks for answer,
alvine: i set through bios (CTRL +I)
mavroxur: i think not. CPU is used about 3 %,
I tried also load image sequenge into composition software (fusion) and this same result).
maybe would be better try save file into ramdisk .....today i will try
January 7, 2013 7:20:57 PM

mavroxur: You were right! saving/loading with Ramdisk its very similar to HDD in all application :o 
ramdisk is faster only about 5-10%. processor loading is 5%
what next...it's realy limit of my system?
a b G Storage
January 7, 2013 8:34:41 PM

I recommend an SSD.
January 8, 2013 5:29:17 PM

SSD is no solution for me.
a b G Storage
January 8, 2013 7:21:23 PM

zdbc13 said:
I recommend an SSD.



I don't think an SSD is going to help, since he doubled his raw read/write speed, and saving typically isn't very IOPS intensive.

OP - Have you tried watching your disk perf monitor during a save?
!