Moving large amounts of files via USB 2.0

[Winchester]

I am wanting to back up my data, around 80gb. I can either get an 120gb external USB drive or regular IDE, both pretty much the same cost. My question is, how long IYO would it take to transfer all 80GB via USB 2.0 vs via IDE. I know it will take longer, but I am wondering how much longer.

 

[MercenaryForHire]

480Mbps / 8 = 60MB/s

80GB = 81920MB

81920MB / 60MB/s = 1365.3s

1365s / 60s/min = 22.75min

Yay, math!

- M4H

 

[daniel1113]

Originally posted by: MercenaryForHire
480Mbps / 8 = 60MB/s

80GB = 81920MB

81920MB / 60MB/s = 1365.3s

1365s / 60s/min = 22.75min

Yay, math!

- M4H

Remember all those kids that would whine during math class? "Teacher, when will we ever use this in real life?" Well, you showed them

 

[Winchester]

Hell, I did that but USB never transfers at 480Mbps that is the max. Just cause it says it can doesnt mean it will.

There is no way in hell that I can move 80GB in 23 minutes. It takes 30+ to move that much IDE - IDE.

 

[seasea]

my external hdd gets rates of 20-40 mbs/sec

 

[MercenaryForHire]

Originally posted by: Winchester
Hell, I did that but USB never transfers at 480Mbps that is the max. Just cause it says it can doesnt mean it will.

There is no way in hell that I can move 80GB in 23 minutes. It takes 30+ to move that much IDE - IDE.

That's because most hard drives have sustained transfer speeds that are way lower than the theoretical max (calculated above)

I'm going to say "Just try it already"

- M4H

 

[twitchee2]

Hell, I did that but USB never transfers at 480Mbps that is the max. Just cause it says it can doesnt mean it will.

agreed it took me ~25min to move 15GBs of music on my external using firewrie

 

[VirtualLarry]

Originally posted by: MercenaryForHire
480Mbps / 8 = 60MB/s
80GB = 81920MB
81920MB / 60MB/s = 1365.3s
1365s / 60s/min = 22.75min

Yay, math!
- M4H

LOL. That was awesome. Now if you could only teach Windows' progress-dialogs to be able to count/calculate that well..

 

[Jeff7]

Originally posted by: daniel1113

Originally posted by: MercenaryForHire
480Mbps / 8 = 60MB/s

80GB = 81920MB

81920MB / 60MB/s = 1365.3s

1365s / 60s/min = 22.75min

Yay, math!

- M4H

Remember all those kids that would whine during math class? "Teacher, when will we ever use this in real life?" Well, you showed them

Heh, I used trigonometry in real life. The free electronic CAD software I was using didn't support rotation of less than 90 degrees. I wanted 35. Had to use sin, cos, tan, whichever of them I needed to figure out where to put the through-holes for the component.
And algebra for the same circuit to figure out the voltage output for an IC.
Of course, that project would likely confuse the hell out of the "Teacher, this is hard stuff, I'll never use this!" people.

And remember, those are ideal speeds. You'll never see that kind of speed.

LOL. That was awesome. Now if you could only teach Windows' progress-dialogs to be able to count/calculate that well.

But it's like the hidden surprise! Don't you just love the indicators that say "100%" for an unspecified amount of time? Place bets with your friends. Try to complete a crossword puzzle before it "actually" finishes! There's so much fun to be had beyond 100%!!!! (Sounds almost like a cheesy corporate slogan, doesn't it?)

 

[sharkeeper]

Originally posted by: MercenaryForHire
480Mbps / 8 = 60MB/s

80GB = 81920MB

81920MB / 60MB/s = 1365.3s

1365s / 60s/min = 22.75min

Yay, math!

- M4H

There's a problem as these numbers are never relised. USB 2.0 achieves far below the max AND it will always take longer especially if there are lots of little files being transferred.

I would say 85 minutes, 33.607 seconds would be a more accurate approximation.

There's so much fun to be had beyond 100%!!!!

Our screws are running at ~104% right now. I'm told we can push them to 115% but she gets bitchy and may trip out on us then we lose time bringing them back online. Gotta love that.

Cheers!