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Velociraptor...only 300 GB? - Page 3

post #21 of 34
Quote:
Originally Posted by DuckieHo View Post
Any HD benchmarks app should be downward sloping on sequential performance. This is due to the fact that data read/write on the other edge is faster.
You're right, and math supports it. I dont know why so many people are having difficulty understanding this concept.

circumference = pi(diameter)
If a point on the inside and a point on the outside of the disk both move at 7200 RPM, a point on the outside of the disk (larger diameter) will move at a higher velocity than the inside, as it has to travel much farther to make the revolution.

Therefor points on the outside pass under the reader much faster, which would result in faster read/write.
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post #22 of 34
Quote:
Originally Posted by TnB= Gir View Post
Lol my raid 0 36gb raptors are enough space for me. Stop dl'ing pr0n guys.

Isn't that what the internetz is for though?
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post #23 of 34
The difficulty to understand is that the inside tracks make more rotations compared to the outside.

While this is true, more data can be retrieved from the outside tracks since it has a larger surface area.
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post #24 of 34
ITT: Stupid people.

Quote:
Originally Posted by Dillard13 View Post
I'm not sure if you did that right.....the math that is. Shouldn't the inner circumference hold the larger number? Also, wouldn't it make more sense to not measure it in meters per minute, but some other measurement that I can't think of.....I wanna say RPM but that's obviously 7,200....
No, he did it exactly right. The speed of the harddrive can be measured in meters per second, because the density of the data across the disc surface is the same therefore the speed is directly related to how much hard drive is moving below the head...

Quote:
Originally Posted by justarealguy View Post
The difficulty to understand is that the inside tracks make more rotations compared to the outside.

While this is true, more data can be retrieved from the outside tracks since it has a larger surface area.
No... The entire disk is spinning at the same speed... That's why it's called a 7200 Revolutions Per Minute drive.

[ontopic]

The RAID controller on the Intel chipsets with Matrix raid capabilities can separate the drives into smaller partitions.
Edited by RonindeBeatrice - 5/12/08 at 1:02pm
    
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post #25 of 34
I have Vista on a 50GB partition with about 20GB free space now that Vista x64 is fully "bedded in". Runs fine to me.

Also, a 300GB raptor would suit me fine as a boot + storage drive. I've never used more space than that, even when I've pretty much installed EVERY game that I own.
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post #26 of 34
I believe I have an answer to the madness! The inside of the drive platter has faster seeks times, while the outsides of the drive have faster sequential reads! I'm a genius!
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post #27 of 34
One thing that sucks about them is they won't fit in Hot Swap bays do to the Ice Pack aluminum HS
    
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post #28 of 34
ok ok so....both inner and outside takes the exact same time to make 1 rotation.
so ....in the same amount of them the of time, the outside will traveld more distant which could also means FASTER on travel speedwise.

I am guessing the seek time should be faster on the outter, not to mention is bigger movement for the heads to move if it need to go through the same amount of space?

I remember we had a discussion about this few years ago............just couldn't remember the result.
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post #29 of 34
I'm throwing two of these into my new summer rig hopefully in RAID 0, along with another 2 500GB 32MB Barracuda's in RAID 0 (Depending on how much storage I need)
post #30 of 34
not trying to be rude but there is a lot of fail on this thread. it's cool though as it's a little interesting thing.

I'll give it a go though.

Quote:
Originally Posted by Robilar View Post
? Since when???

That doesn't happen any more since they updated the hard drive controllers and changed platter configuration (about 5 years ago....)

it's always happened. drive controller isn't going to change the mechanics of the drive. will explain further down.

Quote:
Originally Posted by Manyak View Post
Untrue. SEEK TIMES no longer get degraded, but sequential transfers do.

Think about it - the outside of the drive spins faster than the inside, so the sectors pass faster across the head.
kind of right. inside and outside still spin the same speed the difference though is per rotation of the drive the outside of the drive covers more surface area and so with that you get more bits read/written per rotation of the drive and so the outside of the drive will read/write faster. remember though both inside and outside of the drive still spin at the same speed.
seek times also do degrade a little depending upon it being on the outside vs the inside of the drive.

Quote:
Originally Posted by EmerilLIVE View Post
It's the insides that spin "faster."
read above both spin at the same rate.

Quote:
Originally Posted by Robilar View Post
Which is why hard drives come with 16mb internal cache to increase the speed of the sequential transfer.
it does help a little but it has it's limits. the cahce really only helps for files loaded into the cache. so this can cause problems with loading something for the first time as it has to read straight from the drive, or even if it has been cleared from the cache it has to then laod straight from the drive and the other problem is if the file is larger then the size of the cache then it won't help much either.

Quote:
Originally Posted by Manyak View Post
So what you are saying is that the cache is supposed to increase the speed that the head can read from the disk only on the INNER tracks?

I don't see any way that could possibly make sense.
it doesn't. read above

Quote:
Originally Posted by Manyak View Post
No, its the outsides.

If a disk spins at 7,200RPM, and say the inside of the disk has a 2cm diameter and the outside is 8cm:

Inner Circumference: 2*3.14 = 6.28cm * 7,200RPM = 45 meters per minute
Outer Circumference: 8*3.14 = 25.12cm * = 180.864 meters per minute
didn't check the math. I'm lazy but the idea is correct. rate of rotation stays the same but the amount of area covered per rotation gets larger as you go to the outside of the drive and so therefor you are able to get more bits read per rotation on the outer edge.

Quote:
Originally Posted by Dillard13 View Post
I'm not sure if you did that right.....the math that is. Shouldn't the inner circumference hold the larger number? Also, wouldn't it make more sense to not measure it in meters per minute, but some other measurement that I can't think of.....I wanna say RPM but that's obviously 7,200....
which is larger, a 10foot circle or a 1 foot? which one could hold more people a 10 foot circle or a 1foot circle? and last question is per rotation around each circle which one would you count moer people?
with the measurement it works or he could do feet per second or something like that. the better one would of been bits per second but that would take moer work as you would have to know the bit density.

Quote:
Originally Posted by Dillard13 View Post
Not by centimeters/meters per second, shouldn't it be completions per minutes or so?
not sure what you mean by completions per min. if your talking about how many times you make a complete rotation it is the same on the inside or the outside. you still cover more area per rotation though on the outside.

Quote:
Originally Posted by justarealguy View Post
The difficulty to understand is that the inside tracks make more rotations compared to the outside.

While this is true, more data can be retrieved from the outside tracks since it has a larger surface area.

how would the inside make more rotations then the outside? try this. grab a broom and go outside and start spinning circles and say "hey I'm a ahrd drive" while your spinning how many rotations does the outside of the broom spin vs the inside edge of the broom vs how many times yoru body rotates. it should be the same amount of rotations for each.



sorry about this I have been working on it for about 2 hours now but between working and stuff it has been taking a while so
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