John wrote:
>
>
> Thanks Paul,
>
> Don't know about the expert thing
But the point about boot times is
> not that the BIOS is slow but that Windows is really quick, it wasn't a
> complaint at all.
>
> One question, the case has a SATA connector coming form the front panel
> which I connected to one of the SATA ports on the MB. This is supposed
> to be E-SATA according to the case literature. The power supply has some
> elaborate E-SATA wiring but I had no idea what to do with it, there is
> no place on the MB for it and *if* its supposed to be connected to the
> case front its certainly not obvious or accessible?
>
> Any pictures I might glean some ideas from.
>
> John
Typically, a modern power supply has wiring harnesses for
SATA drives, with 15 contact wafer connectors crimped to the
cable. Those would connect to the hard drive, and they're used
internally.
(The one on the right, is what it might look like. Multiple
of them, on one cable, with some spacing between them.)
http://www.playtool.com/pages/psuconnectors/satano3.jpg
Those wouldn't be used for an ESATA port. At least,
not for the majority of what you can find for sale today.
Maybe some day, that will change.
Generally speaking, you don't want power leaving the
chassis of the computer. One reason for me making that
statement, is the power wires act as antennas for conducted
emissions. If you extend a power cable, or power wires from
the chassis, they should have filters to prevent
conducted emissions. Perhaps that would take the form of
a large ferrite bead. I believe that, as well as safety issues,
is what has prevented a lot of external powering adventures
in the past. If you just extended the SATA power cable
from inside your computer, it could deliver up to the
power supply limit (like, 12V @ 20A), and in the event of
a short circuit, there could be smoke or a fire. If you
deliver power for external use, it's a good idea to put a fuse
inline.
The initial intention for ESATA, was like this. It's a data
only connection, using a total of seven pins on the connector,
where the enclosure provides its own power. That means either
a wall adapter, or an AC cord snaking inside the enclosure.
Computer
Data signals only ESATA Drive
ESATA ----------------------------- + Enclosure ----- Power
Port 7 wires Source
Now, a thing I learned just today, is they've invented an
ESATAP connector. It is ESATA, with a few extra pins added
for distributing power. It changes the ESATA world (in fact,
it means there'll be a whole slew of goofy adapters and
inventions derived from the idea). The ESATAP drive comes
in a slightly different enclosure, as the connector on the
enclosure has a total of 13 pins. The existing
ESATA connector only has seven pins (data only).
I don't know what the current flow limits for ESATAP
pins 12 and 13 are, but they'd have to be able to
handle a 2.5 to 3.0 amp surge on +12V, while the
drive is spinning up. That takes 5 to 10 seconds.
After that, the drive settles down to 0.6 amps or less.
Computer
Data + Power ESATAP Drive
ESATAP ----------------------------- + Enclosure
Port More than 7 wires
Your Sonata will have the older ESATA connector (7 pins).
The fact I only learned about the ESATAP thing today, and
it was invented around 2008, tells you how visible it is :-)
It's never come up in a conversation here.
Apparently, the intended practice will be, ESATAP on
laptops, will have only +5V power. ESATAP on desktops
will have +5V and +12V. A 3.5" drive needs both +5V
and +12V. A 2.5" drive runs everything from +5V.
A desktop will be able to use either 2.5" or 3.5"
external drives, using its ESATAP connector.
If you want to add ESATAP to your Sonata, you'll
be able to buy an add-in PCI Express card, with two
ESATAP on the faceplate. That add-in PCI Express
card, may have some provision for an auxiliary power
connection.
(Koutech card with dual ESATAP on faceplate $40 - has provision
for a 1x4 floppy power connector (the white connector),
to get extra 5V and 12V. You run an ESATAP cable to the
external enclosure.)
http://www.newegg.com/Product/Produc...82E16816104012
I don't see anything in this picture, to suggest current
flow on ESATAP is limited. Neither do I see any significant
conducted emissions prevention.
http://www.koutech.com/images/PESU220_side.jpg
This is an example of an ESATAP enclosure, but I can't find
one for sale to get a price.
http://upload.wikimedia.org/wikipedi...2465-panel.jpg
So some day, those will be more common. But right now, with
your Sonata, you connect a SATA cable to the ESATA on the front
of the Sonata, and then the external ESATA drive enclosure, has
its own power supply. That should work fine.
ESATA cables come in 3 foot and 6 foot lengths.
I recommend buying the short one (3 foot), in order
to guarantee a low error rate on the cable. True ESATA
electrical interfaces, will be able to reach the full
six feet. To protect you from inferior electrical
implementations, I recommend using a 1 meter (3 foot) cable.
If you decide to go ESATA, and you buy a separate enclosure and
a raw drive mechanism, you should run two tests. Install the
raw drive, inside the computer, then run HDTune (you don't need
to format the drive or anything, to do that test). Next, install
the raw drive inside the ESATA enclosure, and run HDTune again.
Compare the graphs. They should be identical. If they're not,
it could be a cabling issue (error rate).
(Examples of HDTune results for my best hard drive)
http://img829.imageshack.us/img829/8...scomposite.gif
(Copy of HDTune)
http://www.hdtune.com/files/hdtune_255.exe
Paul