On Sat, Apr 3, 2010 at 20:16, Glen Farney <[email protected]> wrote:

> Is one of the units wired and the other wireless ?  I've heard that the
> wireless connections are limited in terms of file transfer, perhaps the
> wired aren't limited in the same way.
>

WiFi isn't limited in any special way for file transfers, but WiFi has
inherent limitations when compared to wired Ethernet that make it slower in
general.  First of all, 802.11g has a max theoretical speed of 54Mbps, while
Fast Ethernet (which is what most people have) is 100Mbps, and, of course,
Gigabit Ethernet is 1Gbps.  802.11n maxes out at 600Mbps, but only in very
specific configurations - and, again, that's max theoretical.

In the real world you're rarely going to see anything close to max
theoretical, you're more likely to see maybe half that sustained, often
less.

Another issue is that WiFi is half-duplex, while modern Ethernet systems are
full-duplex. That means that while one WiFi device is transmitting other
devices cannot transmit, they have to wait.  While with wired Ethernet a
device can transmit and receive at the same time.  Also, modern wired
networks are switched, so network segments only carry traffic for devices on
that segment.  That means if you have two devices on switch ports 1 & 2
talking to each other, two other devices on ports 3 & 4 can talk to each
other at the same time - since the traffic doesn't have to cross the same
segment there is no contention.  WiFi is not, everything has to pass through
the access point and share the same channel(s).  So the more devices you
have using the same access point, the slower they can all be.

There are other issues, but I don't want to get even geekier.  Basically,
WiFi is great for portability and when you just can't run a wire, but wired
Ethernet is still the best solution for performance - not to mention
security, reliability, etc.


> I've never tried to move a show from Tivo 1 to PC to Tivo 2, so I'm not
> sure
> how that works given they each have a different Media Access Key.  There
> are
> programs like DirectShowDump that allow you to convert them to basic .mpeg
> file format to watch on any PC.
>

All TiVos on the same account share the same MAK, so you can move content
from TiVo 1 to PC to TiVo 2.  But TiVos on different accounts will have
different MAKs, and you can't transfer content between them, even relaying
through a PC, unless you strip the DRM and turn the .tivo file into a raw
MPG using DirectShowDump or the like.

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