Connecting a Bytecc BT-300 IDE/SATA to USB adapter

September 4, 2012 at 12:28:26
Specs: Win 7
I have this adapter. It came with no instructions. The Bytecc
website has a very poorly-written set of instructions:
Tips to install BT-300

1. For all 2.5” and 3.5” SATA hard drives – Use the 4 pins power
connector plug onto the BT-300 adapter kit. Then connect the
BT-300 adapter to the SATA hard drives. Afterward, power up
the drives by connect the power adapter to the power cord that
plug onto the wall.

2. For all 3.5” and 5.25” IDE drives – Make sure all IDE drives set
as Master drive, use the 4 pins power connector plug directly onto
the drive. Afterward, power up the drives by connect the power
adapter to the power cord that plug onto the wall.

3. For all 2.5” IDE drives – do not use any power from the power
adapter all. The USB connection to the computer will power it up.

4. After the hard drive was power up and spinning, wait a while
and then connect the USB connector from BT-300 to the USB port
on the computer.

It is clear that the USB should be plugged in last.

But I'm unsure about the instruction to plug in the power adapter
after plugging into the data connector. has over 700 reviews of the adapter. I read the 40
most recent, going back about one year. The very last review,
from a few days ago, suggests that the catastrophic problem
reported by many reviewers is due to plugging the 4-pin Molex
power connector in upside-down, because the construction of
the socket allows it. I agree. That isn't directly relevant to my
question, but needed to be mentioned.

Among the 40 most recent reviews, I found three which discuss
the order of plugging things in. The earliest agrees with Bytecc's
instructions above, while the later two reverse the order:
Tech Level: 4/5
Ownership: 3/5
Verified Owner
Rating: 5/5
Pros: There is a .pdf on bytecc's website showing how to connect
drives. go to byteccusa dot com, click the download, and under
adapter cable section click "Tips to install BT-300".
It basically says plug everything into the drives before you plug
in the a/c power. For all SATA drives, you plug in the 4-pin
connector to the adapter itself. For all 3.5" TO 5.25" IDE drives,
the 4-pin connector plugs directly into the hard drive. For all
2.5" IDE drives, do not use any power at all. The usb cord will
provide the power.
Tech Level: 3/5
Ownership: 4/5
Verified Owner
Rating: 5/5
Works like a charm!
Pros: Small and easy to use. Just be sure to plug in the power
cable before the data cable. I have used this for 2.5" SATA and
3.5" IDE drives with no issues.
Tech Level: 4/5
Ownership: 5/5
Rating: 5/5
Great device
Other Thoughts: We've used these for years at the shop I work at
(3 of these, 2 of the previous models) & I've never had a drive fry.
It could be due to you guys either a) plugging in the power upside
down (it has an indication on the head itself which way is up...) or
b) plugging in the power AFTER plugging in the drive (duhhhh,
that will definitely fry the drive. always plug the power in FIRST).

There are three power connectors: The general-purpose power
cord plugs into an outlet at one end and into the power brick at
the other end. The 4-pin Molex connector from the brick can
either plug into the adapter or into a drive. So it is possible to
plug in two of those three connectors without applying power.

So, should I plug in the data connector first, then apply power,
as the Bytecc instructions and the first reviewer say, or apply
power first, and then plug in the data connector, as the other
two reviewers appear to say? Why?

-- Jeff, in Minneapolis

See More: Connecting a Bytecc BT-300 IDE/SATA to USB adapter

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September 4, 2012 at 15:32:22
I have never used this product before, but use something similar and by the sounds of it MUCH better. Iv used it for years, its called a magic bridge 2. Amazinf bit of kit.

Here is my method of connecting to the device:

1) plug in the hard drive in to brige
2) plug in the power into bridge
3) plug in power to the wall
4) plug usb from bridge into computer

This has never failed me yet.

However from what you've written above it seems you will probably need to plug the usb in last inorder to allow the disk to spin up. I would put the data in first then power or to be completly safe, return it and buy a magic bridge. Best piece of kit iv used highly recommend it.

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September 4, 2012 at 18:42:45
Do you need the IDE? Buy a docking station.

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September 4, 2012 at 21:39:39
The only physical problem with the device is, as I said, that
it is possible to jam the Molex plug in upside-down. Since I
am the only person who will be using it, adjusting my behavior
to accommodate this problem (by being careful), in addition
to marking the plug clearly (it wasn't, despite what one of the
reviewers quoted above said), which I have done, means it
should be a non-problem. Hence it is not what I asked about.

My only question is the order in which the connectors should
be connected. I wondered because the instructions are so
badly written, and then I discovered that two of the reviewers
say quite emphatically that the power should be plugged in
before the data connection. That sounds wrong, but no later
reviewer remarked on any error.

-- Jeff, in Minneapolis

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Related Solutions

September 5, 2012 at 09:17:12
I have personally used the linked Vantec product and it works fine on all types of drives. IDE, SATA, 2.5", 3.5", 5.25" optical. This is a very handy and inexpensive tool to have if you only need to access the particular drive occasionally or only once.

If you need it continuously then use a docking station. The instructions are clear. I don't know how you can connect a Molex connector wrong.

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September 5, 2012 at 10:35:04
The Bytecc adapter does exactly the same things, the same way.
As far as I'm concerned -- and as far as I know, not having tried
it yet -- there is nothing wrong with it.

The Molex connector can be plugged in upside-down. The most
recent reviewer on said it is because the plastic
used for the socket is soft rather than hard. I can't tell if that is the
correct explanation without gouging away at the plastic, which I
don't care to do. I already have a (AFAIK) perfectly good adapter.
I'm not interested in buying another one that is virtually identical.

I take it that nobody has any explanation why the second and
third reviewers on Newegg quoted above said that the power
must be connected first.

-- Jeff, in Minneapolis

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September 5, 2012 at 12:06:35
I am guessing that it 'could' be to allow the drive to spin up. that way when you plug it into a machine it can be detected. I could be wrong but then again i cannot think of any other reason.

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September 5, 2012 at 12:48:07
The third reviewer said "... plugging in the power AFTER
plugging in the drive (duhhhh, that will definitely fry the drive.
always plug the power in FIRST)."

No later reviewer complained that he had it backward.

-- Jeff, in Minneapolis

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September 6, 2012 at 18:28:15
A minor correction to my original post:

My BT-300 did come with a warning to plug the Molex
connector in the correct orientation. Obviously Bytecc
was aware of that problem when my unit shipped.

Again, this isn't what I'm asking about.

-- Jeff, in Minneapolis

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