Tom's Hardware > Forum > Storage > Hard Disks > Single drive vs. 2-drive RAID 0 vs. 3-drive RAID 5
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edwardng   10-24-2002 at 08:47:41 AM

I am confused regarding RAID 5 performance after reading the guide at Storage Review.com and reading a RAID card comparison at Anandtech so I will ask the highly knowledgeable group of people who browse this site. Right now I have a FastTrak100 card, am using 2 WD 400BBs in a striping configuration with stripe size of 64kB. Now, I am considering upgrading to a FastTrak SX4000 with 256MB of cache, buying a 3rd 400BB, and switching over to a RAID 5 array with 3 400BBs with 128kB stripe size. How would a 3-drive RAID 5 array compare to a 2-drive stripe array in terms of:
1) Random Read performance
2) Random Write performance
3) Straight Read performance
4) Straight Write performance
Please keep in mind: the 256MB of cache, the fact that I work with a large(r) than normal amount of large(r) files, and that I defrag EVERY NIGHT.

-Ed

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