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 So if you were thinking of Raid-0, Here's the performance result.

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TSnUtZ`
post Jul 2 2004, 03:19 AM, updated 22y ago

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Raid-0 gives nearly 0 performance increase compare to non Raid configuration. It gives you twice the probably of hard drive failure and data lost too... My word of advise? Avoid any Raid-0 configuration at all cost. It is not worth the money or the risk.

Western Digital's Raptors in RAID-0: Are two drives better than one?
ieR
post Jul 2 2004, 06:06 AM

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why when ppl talk about raid0, thier mind are particulary stuck with only 2 hdd? i mean u dun get the full out of 2 hdd, try raid0 with 4 hdd, then u will feel the speed happy.gif ppl only use 2hdd as example, when u are really crazy about speed, 4hdd raid 0 is as fast as a 133mhz ram. happy.gif no kidding, i might as well use 4 raidO hdd (i guess each 40gb X4 =160GB of ram! and cheap though) and following the topic? quad chance of data lost. hohoho very fargile ram indeed.
TSnUtZ`
post Jul 2 2004, 01:19 PM

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QUOTE
4hdd raid 0 is as fast as a 133mhz ram.


on a Pentium III line your maximum bandwidth from your north to south bridge is limited to 266MB/s on most of the motherboard... it is shared between your nework(100Mb, that's 10MB), Sound card, and probably your TV tuner. you'll be happy if the hard disk get 100MB/s from the north to south bridge link itself..

QUOTE
try raid0 with 4 hdd, then u will feel the speed


no thanks.. i'd rather have RAID 5... from the article, the only thing that benifits from the extra bandwidth is from large file transfer... but what are you transftering too? USB 2 or Firewire external hard disk can only give you at most 40 Meg a second. Your network 100MB/s base can give you only 10 meg per second. same goes for your CD/DVD writter... What's the point of having a fast connection when you can't use it? Its like driving a ferrari F1 car on the normal roads..
Eokboy
post Jul 2 2004, 02:50 PM

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Wiord, I have RAID 0 with 2 40GB drives and I saw a very significant increase in performance compared to before I set it up.
cjtune
post Jul 2 2004, 04:46 PM

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I have come across benchmark articles like that too. The general consensus is that RAID-0 gives some performance increase but if any one of the HDD the data is striped across kongs, all the data can be considered martyred. BTW, if the chance of a HDD to kong in any given day is M, then the chance of a RAID-0 array to kong is like NxM, where N is the number of the drives in that array. It increases your chance of data loss!
ultrageek1
post Jul 3 2004, 11:06 AM

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as i've stated in my article that is now "pinned" up, RAID0 came abt in the good ol' days when hdd's capacity were smaller and performance was a slow pooky pre7200rpm (or even 5400rpm)!!!
USB/firewire wasn't available readily, nor was 1000LAN's...

times have changed. hence RAID0 has been discarded by system admins. if we needed RAID0, or any of it's stripe capabilities, we would get NAS or SAN boxes...
TSnUtZ`
post Jul 3 2004, 12:41 PM

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thanks ultra geek... i just need to post some bench marks to convince the ppl here that RAID-0 does not do anything to improve the speed but to add more headache when the hard drive fails. I don't think RAID-0 is ever recomended in any mission critical system at all... smile.gif

anyway NAS solution? Its only feasible for network with 1Gb connection link... Most of companies i know are still stuck with 10Mb connection link. *sigh* yeah i know sad.
nicotine
post Jul 3 2004, 02:05 PM

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raid 0 give no performance increase ? i cant fully agreed that ...
i hav 2 ibm deathstar 40gb running raid 0(in hell) .. all my stuff load way much more faster than running them on normal pata or even single sata eg boot up time way much faster ... Window Boot bar show 5 animated thingy then i'm off in to windows welcome screen.. and this cant be achive using normal pata channel(usually 8~10 count),it's true that normal benchies didnt show much improvement.. let take an example .. on pata(via) my Championship Manager 04 game take around +1 min to fully load.. and with Raid0(highpoint370) it take less than 1min(around 30-45sec) to load ..but then i agree whut u say .. which is .. they are very fragile on critical data..
i'm not flaming here .. just wunna share whut i feel /experience be4 wink.gif
cheers
TSnUtZ`
post Jul 4 2004, 12:57 AM

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QUOTE (nicotine @ Jul 3 2004, 02:05 PM)
raid 0 give no performance increase ? i cant fully agreed that ...
i hav 2 ibm deathstar 40gb running raid 0(in hell) .. all my stuff load way much more faster than running them on normal pata or even single sata eg boot up time way much faster ... Window Boot bar show 5 animated thingy then i'm off in to windows welcome screen.. and this cant be achive using normal pata channel(usually 8~10 count),it's true that normal benchies didnt show much improvement.. let take an example .. on pata(via) my Championship Manager 04 game take around +1 min to fully load.. and with Raid0(highpoint370) it take less than 1min(around 30-45sec) to load ..but then i agree whut u say .. which is .. they are very fragile on critical data..
i'm not flaming here .. just wunna share whut i feel /experience be4 wink.gif
cheers

Hmm.. i don't know.. my SATA windows XP SP1 boots up pretty snappy.. last count was 5 seconds.. As for championship manager.. well i can't comment about that cause i've never played that before..

Probably i should make it clearer about my point on posting this article. I'm acctually annoyed with people recomending RAID-0 for their main hard drive, alot of benchmark shows a little or litterally no improvement in performance (except benchmarking software). What you have is twice the probability of data lost. I've lost one seagate hard disk due to heat before and i know how pissed off i was with that...

Saving 10 seconds off loading your games is not a good enough excuse to have a twice the chance of 5 hours of installing reconfiguring, re downloading , and repatching the systems..
zaidi
post Jul 4 2004, 05:02 AM

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refer to the Pure Hard Disk Performance graph.

to me that's the only graph showing the real potential of raid0.

real-world benchmarks won't show significant score increase. even dual processor system don't show 50% increase in performance, or quad proc to show 100% increase. there's always bottlenecks somewhere.

while maybe saving 10seconds in loading windows/games is not significant, try unrar a 700mb torrent files on a hard drive and compare that with a raid0 setup. i'm sure it's pretty significant time saved.

QUOTE
Saving 10 seconds off loading your games is not a good enough excuse to have a twice the chance of 5 hours of installing reconfiguring, re downloading , and repatching the systems..


if you are refering to MS windows system, you should check out how to make unattended winXP/2000 installation complete with patches and software that can used to restore your system in less than an hour. just remember not to save your data on a raid0 setup biggrin.gif
ultrageek1
post Jul 4 2004, 11:10 AM

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QUOTE (nUtZ` @ Jul 3 2004, 12:41 PM)
anyway NAS solution? Its only feasible for network with 1Gb connection link... Most of companies i know are still stuck with 10Mb connection link. *sigh* yeah i know sad.

hey so is mine!!! but, it's not that bad. i mean, mostly used to store/backup their data. something akin to a file server, but cheaper alternative!

As for RAID0, it all boils down to, do you feel for THE NEED FOR SPEED??? tongue.gif
but in all seriousness, unless you're dealing with extermely huge files, which majority don't, RAID0 is pretty usesless in todays world!
i mean, most of us just use our office pc for office productivity stuff. how many needs to open > 100megs files? i would say very few. proly can count too!!!
Added with the extremely cheap cost of hdd nowadays, RAID5 is always the better option...

But this is not to say RAID0 isn't really what it claims. Depends on hdd's and how/what you use it for... in short, depends on scenario.
fridaynite
post Jul 6 2004, 02:23 PM

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With RAID 0 setup (80GB*2), I've tried installing a big game (installation files on hard disk), transfering a few gig of files from a partition to another and playing a divx movie on WMP (just for the heck of it tongue.gif ).

Absolutely smooth......

Then again, how often do we install games while transfering massive volumes of files and watching a movie.. tongue.gif
kev da man
post Jul 7 2004, 03:13 PM

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if u have 4 hdds and want to raid, raid 5 is the way
ultrageek1
post Jul 8 2004, 08:51 AM

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some benchies for you guys to chew on...

http://www.bjorn3d.com/read.php?cID=647

to me, they are just numbers. whether in real life, it DOES show THAT kind of improvement, i leave it to you guys to decide...

This post has been edited by ultrageek1: Jul 8 2004, 08:52 AM
meow
post Jul 8 2004, 09:07 AM

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QUOTE (kev da man @ Jul 7 2004, 03:13 PM)
if u have 4 hdds and want to raid, raid 5 is the way

u only need 3 hdd to do raid 5...
if u have 4 hdd, better option go for multi-level raid like 0+1.
bcoz raid 5 will have deep impact in random write performance...
but i dun think intel ich5r can do the above...
TSnUtZ`
post Jul 8 2004, 12:52 PM

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QUOTE (ultrageek1 @ Jul 8 2004, 08:51 AM)
some benchies for you guys to chew on...

http://www.bjorn3d.com/read.php?cID=647

to me, they are just numbers. whether in real life, it DOES show THAT kind of improvement, i leave it to you guys to decide...

And let me raise you this link..

RAID-0 FAQ
ionStorm
post Jul 15 2004, 05:41 PM

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I do lots of audio and video editing. I figure RAID 0 would be good for meh... smile.gif
cjtune
post Jul 15 2004, 05:55 PM

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QUOTE (ultrageek1 @ Jul 4 2004, 11:10 AM)
but in all seriousness, unless you're dealing with extermely huge files, which majority don't, RAID0 is pretty usesless in todays world!

Filesystems also matter. That's why some ppl prefer XFS over ReiserFS for their Linux rig. I deal with huge files where I worked last time. We can churn out simulation data in files in the order of gigabytes.


nrchy
post Jul 15 2004, 10:38 PM

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QUOTE (cjtune @ Jul 15 2004, 05:55 PM)
Filesystems also matter. That's why some ppl prefer XFS over ReiserFS for their Linux rig. I deal with huge files where I worked last time. We can churn out simulation data in files in the order of gigabytes.

wow, gigs of data..where did you work last time?
cjtune
post Jul 15 2004, 10:57 PM

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QUOTE (nrchy @ Jul 15 2004, 10:38 PM)
wow, gigs of data..where did you work last time?

I was a support engineer for some engineering software. It simulates fluid flow and heat transfer. One class of phenomena to be simulated is the 'transient' phenomena, where the system response changes with time (and with possibly time-dependent boundary conditions). To simulate such cases, 'snapshots' of the the system (not the PC!) condition have to be saved and many snapshots are needed to visualise how it changes with time.... thus the data output is in gigs. Compression like gzip or bzip can reduce it to 75% or 50% of its size but I'd rather just waste more CDs to backup than waiting past punch-out time to go home. Imagine the frustration coming in to work next morning to find that your simulation has kapoot overnight because an ancient UNIX filesystem cannot support files larger than 2GB... I moved on to Linux afterwards and the UNIX machines became legacy devices to help troubleshoot customer problems only.



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