[KLUG Members] help for longtime (but novice) user who finally managed to misuse rm...?

[Adam Tauno Williams]

> > For anyone looking to buy an external USB drive, make sure both your
> > drive and PC support USB 2.0 HI-speed.  Anything slower (like USB
> > 1.1 
> > or USB 2.0 FULL-speed), and you might as well backup to floppy.  :

> or FIreWire 400, which has a higher throughput than USB2, even though
> USB2 is rated at 480Mbit/s
> of course, one could just go all the way to FireWire 800 :)

You are looking at a serious issue of diminishing returns however.  You
are not going to get anything like 480 throughput out of a single
spindle, in a real world scenario you are pretty luck if you can get 100
so beyond that bus speed becomes much less relevant (for a single drive
scenario).  Even a SCSI-Ultra bus at 160 attached to a multi-drive cage
is rarely a bottleneck;   in the real world drives are not anywhere near
as fast as silly benchmarks claim.

The question I have, and I haven't seen discussed, is whether firewire
or USB is actually faster in practice attached to the same device from
the same computer.  Does is matter much what your controller chip-set
is?  Because in the case of SCSI is certainly does.

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