On 02/08/11 09:20, Alessandro Bono wrote:
> Hi all
> 
> I need an LTO4 or LTO5 tape with usb interface, someone know a similar
> beast?

"So what you've got to ask yourself is, do you feel lucky?  Well, do ya
... punk?"

"Full speed" USB 1.1 is 12 Mbit/s (roughly 1.44 MB/s).  "High speed" USB
2.0 can theoretically hit 480 Mbit/s (roughly 57 MB/s).  An LTO1 drive
can transfer data at 20 MB/s, LTO2 40MB/s, LTO3 80 MB/s.  Do the math.
Even a maximum speed USB2.0 connection won't keep an LTO3 drive
streaming, let alone an LTO4 or LTO5.


(Footnote:  LTO technology is now planned to extend out to LTO8, with
native uncompressed capacity of 12.8TB and transfer rate of 472MB/s.  No
word on what interface is going to be required to accomplish a sustained
transfer rate of almost half a gigabyte per second.  Direct PCI-Express
connection...?)


-- 
  Phil Stracchino, CDK#2     DoD#299792458     ICBM: 43.5607, -71.355
  alaric AT caerllewys DOT net   alaric AT metrocast DOT net   phil AT 
co.ordinate DOT org
         Renaissance Man, Unix ronin, Perl hacker, Free Stater
                 It's not the years, it's the mileage.

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