Tom Gal wrote:
On 9/9/05, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
I just plugged in a 40 Gb USB drive into my Linux
laptop and the darn thing worked right away! Imagine that!
How does the speed compare to good ol' IDE hard drives?
Is USB now slowly going to replace IDE and many PCI cards?
Funnily enough, we just had this discussion at work.
The HS-USB data rate is it's theoretical maximum transport layer rate.
But with protocol overhead, there's is NO WAY HD's will get 60MB/s
Compare this with Ethernet (100Mbs) or GigE (1Gbps) and TCP. There is NO
WAY you will get 1Gbs TCP transfer. You'd be happy with 80% of that, and
estatic with 90% (in some recent performance tests at work, were able to
squeeze 850Mbs with TCP over GigE). There is a comparison similarity
between the TCP overhead (using buffers, waiting for ACK's etc) as there
is with the HD transfer protocols
In the end, our conclusion is that USB drives are (at the moment)
dissapointing compared to fixed drives in the performance category, but
they are exceptional when you include the convenience factor.
Well Full Speed USB = 12Mbits/second where Hi-Speed USB = 480Mbits/second.
But it all depends on the HD speed of the device itselft..
Technically an Ultra ATA/133 interface maximizes supports data
transfer rate up to 133MB/sec. But that all depends on the drive as
well.
Is that 133MB/s or 133Mb/s ?
If it's MB/s, thent that's at least twice the speed of HS-USB
--
Michael O'Keefe | [EMAIL PROTECTED]
Live on and Ride a 03 BMW F650GSDakar| [EMAIL PROTECTED] / |
I like less more or less less than |Work:+1 858 845 3514 / |
more. UNIX-live it,love it,fork() it |Fax :+1 858 845 2652 /_p_|
My views are MINE ALONE, blah, blah, |Home:+1 760 788 1296 \`O'|
blah, yackety yack - don't come back |Fax :+1 858 _/_\|_,
--
[email protected]
http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
