[mythtv-users] OT: Size (MB) of Samsung HD501LJ drive?

[Josh White]

Actually, most cars deliver about 80% of their rated engine horsepower to
the road.  And the 20% that doesn't go to the road is the energy required to
transmit the energy from the flywheel, through the transmission which
converts the output speed/torque to a useful level, and so forth.  Nothing's
free in the world of thermodynamics.  If cars were rated in their wheel
horsepower, then the numbers would come out correctly.  If you look closely,
most cars are advertised as having a "300hp engine," not "300hp available at
the drive wheels."  Also, there's a new SAE standard for rating engine
horsepower, which increased the number of significant figures involved, the
accuracy of the rating, and the way 3rd party verification is handled.  You
may have noticed cars such as the Honda Civic Si, which has a 197hp engine,
rather than the 200hp engine it was advertised to have in all the car
magazines.  The engine doesn't have any more or less hp than planned, it's
simply rated in a different way.

/just sayin'

On 10/8/07, Brian Wood <beww at beww.org> wrote:
>
> Dean Harding wrote:
> > Michael Heironimus wrote:
> >> You need another multiplier in there to make it come out right.
> >>
> >> 465.76G * 1024M/G * 1024k/M * 1024b/k = 500105991946 bytes
> >
> > It's kind of annoying that as drives get bigger and bigger, the size the
> > manufacturer reports gets further and further from the size the
> > operating system reports i.e. every order of magnitude takes it further
> > apart -- 1000GB drives are becoming common now, but the OS reports a 1TB
> > drive as 0.91TB; a discrepancy of 10%!
>
> Certainly nothing new:
>
> No "56K" modem can hit that speed, even theoretically due to telco level
> restrictions, and it comes somewhere close only in one direction, and
> only if it's talking to a digital interface, not a modem like itself.
>
> No "54 Mbps" 802.11 link can ever hit that speed, and certainly no "108"
> unit can come close to that.
>
> SATA 300 drives are NOT faster than SATA 150 units (at least not today),
> in fact some of the latter are faster than any of the former.
>
> No "GigaBit" ethernet link can run at that speed.
>
> No "420 Mhz." USB 2.0 link will ever transfer data in a sustained way at
> anywhere close to that speed. A firewire link, rated at 400, is actually
> faster than the "420" USB link, but still can't sustain the advertised
> rate.
>
> No "6-hour battery" laptop will ever run for that length of time on a
> single charge, at least not if it's doing anything but idling with the
> CPU throttled and the HDD spun down.
>
> No "20-mile" range GPRS radio will ever achieve that range, unless
> perhaps it's straight up.
>
> Face it folks, we are lied to all the time by the marketers, it's just
> up to us to know what we are buying.
>
> And your "300 Horsepower" car might deliver almost half of that to the
> road surface.
>
> And of course, where do you think "YMMV" comes from ?
>
> beww
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