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USB 3.0 download speeds

by crash727 / May 1, 2013 5:39 AM PDT

I would like to know what kind of download speed I should be getting using a USB 3.0 WD Passbook external HD. I have a Azus P8Z77-V motherboard that has USB 3.0 connections. The internal HD i'm using as a source drive is a WD black.m My processor is an Intel CORE i5. I am mostly backing up MP3 music files. I'm getting speeds of 24-29mb/s I thing that is slow

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All Answers

Best Answer chosen by crash727

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Re: speed
by Kees_B Forum moderator / May 1, 2013 5:52 AM PDT

mb/s is dat megabit or megabyte per seconds. I assume bytes, and that isn't bad for a USB 2 external hard disk.

Consider a USB 3.0 is 3 times faster. So if your backup now takes 15 minutes it will take 5 minutes then. That's why make an incremental backup during lunch or dinner or when looking at the news on the TV. My file backup is ready before I'm ready, so i feel no urgent need for a faster backup device.

But if your backup takes 1.5 hours it might be worthwhile.


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USB 3.0 speed
by crash727 / May 1, 2013 1:31 PM PDT
In reply to: Re: speed

You're right that isn't bad for a USB 2.0 but i'm using a USB 3.0 device and my internal source drive is a sata WD black HD which is a pretty fast HD. That's why I think my back-up speed is slow. Asus told me I should be getting about 150mb/s Do you think there could be a problem with my MB

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No. Here's why.
by R. Proffitt Forum moderator / May 1, 2013 1:41 PM PDT
In reply to: USB 3.0 speed

The transfer rate is higher but the hard drive is still going to have the SAME delays as the head moves from the data area to the directory and the file allocation areas so a lot of the time it's moving the head around.

If you use Windows Explorer to copy the files, you added a pile of overhead. The fastest copies I see are with the command line and next after that is -> Roadkil's Unstoppable Copier <-

For me, the command line wins.

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(NT) Thanks very much for the info
by crash727 / May 1, 2013 11:14 PM PDT
In reply to: No. Here's why.
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by spadeskingtx / May 2, 2013 7:20 AM PDT
In reply to: No. Here's why.

To expand on the concept of using the command line to copy/backup files. You can use xcopy and it has switches to include subdirectories, and switches to only copy files that have the archive bit on indicating the file has changed recently, and you can turn that archive bit off as you make the copy.

My typical line is xcopy c:\original\*.* d:\backup-C\original\*.* /s/v/a/m

Run xcopy /? to get a list of switches and their meanings.

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Seems normal
by Jimmy Greystone / May 1, 2013 5:55 AM PDT

Seems normal. The problem you're having is with overhead. Without getting deep into the weeds, there's a lot of behind the scenes stuff going on when you copy files. The OS has to open each file, read the contents, duplicate them, then close the file before moving on to the next one. So long story short, trying to transfer a large number of small files is always going to be slow.

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(NT) thanks for the info
by crash727 / May 2, 2013 4:41 AM PDT
In reply to: Seems normal
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