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walkaboutcamera
 Post subject: USB 3
PostPosted: Sun Feb 21, 2010 11:17 pm 
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Don't know if this has been posted before but...

was just on the WD site and there is now UBB 3. The WD site is claiming 5 GB/sec. For thier drive, I believe thats 10 times faster than firewire and 67% faster than SATA
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dant
 Post subject: Re: USB 3
PostPosted: Sun Feb 21, 2010 11:19 pm 
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walkaboutcamera wrote:
Don't know if this has been posted before but...

was just on the WD site and there is now UBB 3. The WD site is claiming 5 GB/sec. For thier drive, I believe thats 10 times faster than firewire and 67% faster than SATA


Beware Peak quotes like that. What is the sustained transfer?
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radup70
 Post subject: Re: USB 3
PostPosted: Sun Feb 21, 2010 11:24 pm 
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walkaboutcamera wrote:
Don't know if this has been posted before but...

was just on the WD site and there is now UBB 3. The WD site is claiming 5 GB/sec. For thier drive, I believe thats 10 times faster than firewire and 67% faster than SATA


that is a peak rate which is attained only in theory.
What you need to look at is the sustained transfer rate. This is the transfer rate which can be achieved for transferring large blocks of data.

Both firewire and SATA have greater sustained transfer rates than USB, SATA being the fastest.
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Seren Dipity
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PostPosted: Sun Feb 21, 2010 11:26 pm 
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http://www.pcworld.com/article/186566/u ... rives.html
http://www.everythingusb.com/superspeed-usb.html

Some more information here.
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walkaboutcamera
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PostPosted: Sun Feb 21, 2010 11:30 pm 
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That's true, but still you could have a number of external drives a firewire type speed on the same hub and the hub would not be the bottle neck. That's just way cool.
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GrantH
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PostPosted: Tue Feb 23, 2010 5:48 pm 
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All the reviews I've have shown comparable speeds to connecting sata directly to the motherboard. It's great, now I can make all 9 of my drives external. Now I just need a bigger desk.
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matt.mackinnon
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PostPosted: Sun Feb 28, 2010 2:57 pm 
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Keep in mind what SATA spec that you are referring to. the SATAiii is rated at 6mb/s. Now to find any drive that can truly transfer at that rate will take some time. Also, you have to question as well the bus on the motherboard and does it have the bandwidth to process that data rate?

And to think back to my first computer that we use to load everything off a cassette tape. Then we got a floppy disk drive, and it was revolutionary fast, and the capacity that would blow your mind... if only i knew then what I know now....


Matt.
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My Flickr - Canon EOS 50D | Canon EFs 18-200mm IS f3.5-5.6 kit lens | Canon EF 50mm f1.4 | Canon 430 EX II
Post Production: AMD Phenon II X4 - 8gb Ram, Win7-64, NEC EA231WMi | Adobe Photoshop CS4 NAPP member
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sliua
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PostPosted: Mon Mar 01, 2010 12:00 pm 
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SATA 3.0 goes up to 6 Gbps full duplex
USB 3.0 goes up to 5 Gbps full duplex
USB 2.0 goes up to 480 Mbps half-duplex

PCIE 2.0 is up to 5 Gbps per lane, Southbridge <=> Northbridge is usually several lanes
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