TiM Posted January 2, 2003 Posted January 2, 2003 What's faster: RAID 0 (UDMA66/5400 20Gb + UDMA100/5400 20Gb) or UDMA100/5400 40Gb? RAID 0 (UDMA66/5400 20Gb + UDMA100/5400 20Gb) or UDMA100/7200 40Gb? RAID 0 (UDMA100/5400 20Gb + UDMA100/5400 20Gb) or UDMA133/7200 40Gb? Share this post Link to post Share on other sites More sharing options...
GolDfiNger Posted January 2, 2003 Posted January 2, 2003 What's faster: RAID 0 (UDMA66/5400 20Gb + UDMA100/5400 20Gb) or UDMA100/5400 40Gb? RAID 0 (UDMA66/5400 20Gb + UDMA100/5400 20Gb) or UDMA100/7200 40Gb? RAID 0 (UDMA100/5400 20Gb + UDMA100/5400 20Gb) or UDMA133/7200 40Gb? hmm the first one i would say the udma100/5400 40Gb would be faster, the udma66 on the raid would slow teh udma100 drive down no? samd with the second the third, the raid may be faster, it actually probably depends on the drive, its seek time and whatnot, not just the rpm's of the drive Share this post Link to post Share on other sites More sharing options...
DNAT Posted January 11, 2003 Posted January 11, 2003 Of all your options, Tim, the 2 x UDMA100 / 5400 / 20s will run the fastest if they are the same model. They'll eek out the 133/7200/40 by a little bit (prob around 10-15%). You have to be careful though because RAID 0 alone doubles the failure rate of an array -- i.e. if mean fail time was 50,000 hrs/drive before, the "statistical" MTBF for the array is 25,000. One drive's failure is also a "catastrophic" failure...no way to recover anything off either disk. RAID 1 mirrors disks and has terrific failure protection (statistically 1:50,000X50,000=1 in 2,500,000,000 hours) hence why RAID 1 (and others like 3 or 5 with ECC) are used in servers. As with the "dual processor" question, RAID isn't for everyone. Gaming systems with a single OS do very well with a single, strong UDMA133/7200RPM drive. If you want all our speed from a raid system (RAID 0 - striping), make sure all your disks (2, 3 or 4) are all the same type and size. My Raid 0+1 system stripes 2 drives together for speed, then mirrors them with 2 more for fault tolerance (max 4 drives on a HighPoint 372 controller). I don't even see system crashes, since the RAID software automatically repairs any problems with the master array from the mirror! It did cost me 4 drive though, but all my school work is on the computer, and I'd hate to lose my thesis work! FWIW, DT Share this post Link to post Share on other sites More sharing options...
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