"12 hours?!? Holy crap. I can sum it up in 20 seconds:"...and get it wrong. How, exactly, is raid 1 "Fast as hell?" Speed is generally equal to that of a single drive. Also, raid 5 performance isn't "Generally Slow," it depends on the type of access you're talking about. Read access performance is can be higher than raid 0 because you've got at least one more drive that you're pulling data from. Write performance is slower because it's got to sort out parity data.If you're going to knock on someone, at least take some time to get your own facts straight.
"How, exactly, is raid 1 "Fast as hell?" Speed is generally equal to that of a single drive."With a good controller, reading is double speed because it can read from both drives. Writing doesn't change, admittedly."Also, raid 5 performance isn't "Generally Slow," it depends on the type of access you're talking about. Read access performance is can be higher than raid 0 because you've got at least one more drive that you're pulling data from."Read access won't be any faster than RAID 0 with a normal 3 drive RAID 5 configuration, because you're still only reading from two drives. Yeah, you can gain from striping, but not any more than RAID 0 can. And writing is slower because you've got to do the math to write to that "parity" drive (although "parity" is not the actual algorithim generally used except in simple RAID 5 configurations, Reed Solomon is better and can be almost as fast)."If you're going to knock on someone, at least take some time to get your own facts straight."Who's knocking on someone?? Not me. But that last bit of advice: right back at ya.
> see how if you pull one bottle out from> raid 1 it will leave a mess but if you > do the analogy of water and voltage, > putting a water bottle on top of > another will give it all more overall > potential energy,Yeah... and let's color the water in the checksum jug with blue food coloring so nodody drinks it.will still have one bottle functioning, but from a speed point of
Hmm, I suppose that's true. My thoughts were going more towards the optimal setup of each, which certainly would not include a large raid0 array. Honestly, I'm leary of using raid 0 at all for anything more than a scratch volume. :)
Kind of lame. QUOTE "A no-brainer, non-geek presentation of what the different RAID levels mean. :)" It's NOT a no-brainer, or a non-geek presentation UNLESS you have a "geek" next to you to explain it. I get it because I know RAID. But my mom would have NO idea what those water jugs are... no digg.yep.... but im a geek so i get it.and yes its funny, but some might not even get it.
jdgtrplyrOct 28, 2005
Good explanation, good resource = dugg!
gotroot11Oct 28, 2005
well access granted.. kind of a let down after the slight build up of not being able to get in.. useful though
blackrabbitOct 28, 2005
this has already been posted with more detail
spectre_25gtOct 28, 2005
"12 hours?!? Holy crap. I can sum it up in 20 seconds:"...and get it wrong. How, exactly, is raid 1 "Fast as hell?" Speed is generally equal to that of a single drive. Also, raid 5 performance isn't "Generally Slow," it depends on the type of access you're talking about. Read access performance is can be higher than raid 0 because you've got at least one more drive that you're pulling data from. Write performance is slower because it's got to sort out parity data.If you're going to knock on someone, at least take some time to get your own facts straight.
ottoOct 28, 2005
"How, exactly, is raid 1 "Fast as hell?" Speed is generally equal to that of a single drive."With a good controller, reading is double speed because it can read from both drives. Writing doesn't change, admittedly."Also, raid 5 performance isn't "Generally Slow," it depends on the type of access you're talking about. Read access performance is can be higher than raid 0 because you've got at least one more drive that you're pulling data from."Read access won't be any faster than RAID 0 with a normal 3 drive RAID 5 configuration, because you're still only reading from two drives. Yeah, you can gain from striping, but not any more than RAID 0 can. And writing is slower because you've got to do the math to write to that "parity" drive (although "parity" is not the actual algorithim generally used except in simple RAID 5 configurations, Reed Solomon is better and can be almost as fast)."If you're going to knock on someone, at least take some time to get your own facts straight."Who's knocking on someone?? Not me. But that last bit of advice: right back at ya.
duncanOct 29, 2005
jezze this s**ts old, welcome to the internet guys
Closed AccountOct 29, 2005
> see how if you pull one bottle out from> raid 1 it will leave a mess but if you > do the analogy of water and voltage, > putting a water bottle on top of > another will give it all more overall > potential energy,Yeah... and let's color the water in the checksum jug with blue food coloring so nodody drinks it.will still have one bottle functioning, but from a speed point of
spectre_25gtOct 29, 2005
Hmm, I suppose that's true. My thoughts were going more towards the optimal setup of each, which certainly would not include a large raid0 array. Honestly, I'm leary of using raid 0 at all for anything more than a scratch volume. :)
Closed AccountNov 6, 2005
Kind of lame. QUOTE "A no-brainer, non-geek presentation of what the different RAID levels mean. :)" It's NOT a no-brainer, or a non-geek presentation UNLESS you have a "geek" next to you to explain it. I get it because I know RAID. But my mom would have NO idea what those water jugs are... no digg.yep.... but im a geek so i get it.and yes its funny, but some might not even get it.
mvidataJun 18, 2009
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